10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended June 30, 2011

¨ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the Transition Period From             to              .

Commission file number 001-32336 (Digital Realty Trust, Inc.)

                                            000-54023 (Digital Realty Trust, L.P.)

DIGITAL REALTY TRUST, INC.

DIGITAL REALTY TRUST, L.P.

(Exact name of registrant as specified in its charter)

Maryland (Digital Realty Trust, Inc.) Maryland (Digital Realty Trust, L.P.)	26-0081711 20-2402955
(State or other jurisdiction of incorporation or organization)	(IRS employer identification number)
560 Mission Street, Suite 2900 San Francisco, CA	94105
(Address of principal executive offices)	(Zip Code)

(415) 738-6500

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Digital Realty Trust, Inc.	Yes  x      No   ¨
Digital Realty Trust, L.P.	Yes  x      No   ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Digital Realty Trust, Inc.	Yes  x      No   ¨
Digital Realty Trust, L.P.	Yes  x      No   ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Digital Realty Trust, Inc.:

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Digital Realty Trust, L.P.:

Large accelerated filer	¨	Accelerated filer	¨
Non-accelerated filer	x  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Digital Realty Trust, Inc.	Yes  ¨      No   x
Digital Realty Trust, L.P.	Yes  ¨      No   x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Digital Realty Trust, Inc.:

Class	Outstanding at August 1, 2011
Common Stock, $.01 par value per share	99,376,058

EXPLANATORY NOTE

This report combines the quarterly reports on Form 10-Q for the quarter ended June 30, 2011 of Digital Realty Trust, Inc., a Maryland corporation, and Digital Realty Trust, L.P., a Maryland limited partnership, of which Digital Realty Trust, Inc. is the sole general partner. Unless otherwise indicated or unless the context requires otherwise, all references in this report to “we,” “us,” “our,” “our company” or “the company” refer to Digital Realty Trust, Inc. together with its consolidated subsidiaries, including Digital Realty Trust, L.P. Unless otherwise indicated or unless the context requires otherwise, all references to “our operating partnership” or “the operating partnership” refer to Digital Realty Trust, L.P. together with its consolidated subsidiaries.

Digital Realty Trust, Inc. is a real estate investment trust, or REIT, and the sole general partner of Digital Realty Trust, L.P. As of June 30, 2011, Digital Realty Trust, Inc. owned an approximate 95.1% common general partnership interest in Digital Realty Trust, L.P. The remaining approximate 4.9% common limited partnership interests are owned by non-affiliated investors and certain directors and officers of Digital Realty Trust, Inc. As of June 30, 2011, Digital Realty Trust, Inc. owned all of the preferred limited partnership interests of Digital Realty Trust, L.P. As the sole general partner of Digital Realty Trust, L.P., Digital Realty Trust, Inc. has the full, exclusive and complete responsibility for the operating partnership’s day-to-day management and control.

We believe combining the quarterly reports on Form 10-Q of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. into this single report results in the following benefits:

• enhancing investors’ understanding of our company and our operating partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both our company and our operating partnership; and

• creating time and cost efficiencies through the preparation of one combined report instead of two separate reports.

There are a few differences between our company and our operating partnership, which are reflected in the disclosure in this report. We believe it is important to understand the differences between our company and our operating partnership in the context of how Digital Realty Trust, Inc. and Digital Realty Trust, L.P. operate as an interrelated consolidated company. Digital Realty Trust, Inc. is a REIT, whose only material asset is its ownership of partnership interests of Digital Realty Trust, L.P. As a result, Digital Realty Trust, Inc. does not conduct business itself, other than acting as the sole general partner of Digital Realty Trust, L.P., issuing public equity from time to time and guaranteeing certain unsecured debt of Digital Realty Trust, L.P. Digital Realty Trust, Inc. itself does not issue any indebtedness but guarantees some of the unsecured debt of Digital Realty Trust, L.P., as disclosed in this report. Digital Realty Trust, L.P. holds substantially all the assets of the company and holds the ownership interests in the company’s joint ventures. Digital Realty Trust, L.P. conducts the operations of the business and is structured as a partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to Digital Realty Trust, L.P. in exchange for partnership units, Digital Realty Trust, L.P. generates the capital required by the company’s business through Digital Realty Trust, L.P.’s operations, by Digital Realty Trust, L.P.’s direct or indirect incurrence of indebtedness or through the issuance of partnership units.

The presentation of noncontrolling interests in operating partnership, stockholders’ equity and partners’ capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of Digital Realty Trust, L.P. The common limited partnership interests held by the limited partners in Digital Realty Trust, L.P. are presented as limited partners’ capital within partners’ capital in Digital Realty Trust, L.P.’s condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in Digital Realty Trust, L.P. are presented as general partner’s capital within partners’ capital in Digital Realty Trust, L.P.’s condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders’ equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The differences in the presentations between stockholders’ equity and partners’ capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Digital Realty Trust, L.P. levels.

2

To help investors understand the significant differences between the company and the operating partnership, this report presents the following separate sections for each of the company and the operating partnership:

• condensed consolidated financial statements;

• the following notes to the condensed consolidated financial statements:

• Debt of the Company and Debt of the Operating Partnership;

• Income per Share and Income per Unit; and

• Equity and Accumulated Other Comprehensive Loss, Net of the Company and Capital and Comprehensive Income of the Operating Partnership.

• Liquidity and Capital Resources in Management’s Discussion and Analysis of Financial Condition and Results of Operations; and

• Unregistered Sales of Equity Securities and Use of Proceeds.

This report also includes separate Item 4. Controls and Procedures sections and separate Exhibit 31 and 32 certifications for each of the company and the operating partnership in order to establish that the Chief Executive Officer and the Chief Financial Officer of each entity have made the requisite certifications and that the company and the operating partnership are compliant with Rule 13a-15 or Rule 15d-15 of the Securities Exchange Act of 1934 and 18 U.S.C. §1350.

In order to highlight the differences between the company and the operating partnership, the separate sections in this report for the company and the operating partnership specifically refer to the company and the operating partnership. In the sections that combine disclosure of the company and the operating partnership, this report refers to actions or holdings as being actions or holdings of the company. Although the operating partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the company is appropriate because the business is one enterprise and the company operates the business through the operating partnership.

As general partner with control of the operating partnership, Digital Realty Trust, Inc. consolidates the operating partnership for financial reporting purposes, and it does not have significant assets other than its investment in the operating partnership. Therefore, the assets and liabilities of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. are the same on their respective condensed consolidated financial statements. The separate discussions of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. in this report should be read in conjunction with each other to understand the results of the company on a consolidated basis and how management operates the company.

3

DIGITAL REALTY TRUST, INC. AND DIGITAL REALTY TRUST, L.P.

FORM 10-Q

FOR THE QUARTER ENDED JUNE 30, 2011

TABLE OF CONTENTS

		Page Number
PART I.	FINANCIAL INFORMATION
ITEM 1.	Condensed Consolidated Financial Statements of Digital Realty Trust, Inc.:
	Condensed Consolidated Balance Sheets as of June 30, 2011 (unaudited) and December 31, 2010		5
	Condensed Consolidated Income Statements for the three and six months ended June 30, 2011 and 2010 (unaudited)		6
	Condensed Consolidated Statement of Equity for the six months ended June 30, 2011 (unaudited)		7
	Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June  30, 2011 and 2010 (unaudited)		8
	Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2011 and 2010 (unaudited)		9
	Condensed Consolidated Financial Statements of Digital Realty Trust, L.P.:
	Condensed Consolidated Balance Sheets as of June 30, 2011 (unaudited) and December 31, 2010		11
	Condensed Consolidated Income Statements for the three and six months ended June 30, 2011 and 2010 (unaudited)		12
	Condensed Consolidated Statement of Capital for the six months ended June 30, 2011 (unaudited)		13
	Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June  30, 2011 and 2010 (unaudited)		14
	Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2011 and 2010 (unaudited)		15
	Notes to Condensed Consolidated Financial Statements of Digital Realty Trust, Inc. and Digital Realty Trust, L.P.		17
ITEM 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		49
ITEM 3.	Quantitative and Qualitative Disclosures About Market Risk		76
ITEM 4.	Controls and Procedures (Digital Realty Trust, Inc.)		78
	Controls and Procedures (Digital Realty Trust, L.P.)		78
PART II.	OTHER INFORMATION		79
ITEM 1.	Legal Proceedings		79
ITEM 1A.	Risk Factors		79
ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds		79
ITEM 3.	Defaults Upon Senior Securities		79
ITEM 4.	Removed and Reserved		79
ITEM 5.	Other Information		79
ITEM 6.	Exhibits		80
	Signatures		82
	Exhibit Index		83

4

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share data)

	June 30, 2011			December 31, 2010
	(unaudited)
ASSETS
Investments in real estate:
Properties:
Land	$	498,522		$	478,629
Acquired ground leases		6,796			6,374
Buildings and improvements		4,820,275			4,459,047
Tenant improvements		290,643			283,492
Total investments in properties		5,616,236			5,227,542
Accumulated depreciation and amortization		(781,871	)		(660,700	)
Net investments in properties		4,834,365			4,566,842
Investment in unconsolidated joint ventures		18,145			17,635
Net investments in real estate		4,852,510			4,584,477
Cash and cash equivalents		27,900			11,719
Accounts and other receivables, net of allowance for doubtful accounts of $1,955 and $3,250 as of June 30, 2011 and December 31, 2010, respectively		83,672			70,337
Deferred rent		218,318			190,067
Acquired above market leases, net		34,506			40,539
Acquired in place lease value and deferred leasing costs, net		322,793			334,366
Deferred financing costs, net		21,821			22,825
Restricted cash		56,928			60,062
Other assets		39,957			15,091
Total assets	$	5,658,405		$	5,329,483
LIABILITIES AND EQUITY
Revolving credit facility	$	341,417		$	333,534
Unsecured senior notes, net of discount		1,465,587			1,066,030
Exchangeable senior debentures, net of discount		314,588			353,702
Mortgage loans, net of premiums		935,485			1,043,188
Other secured loan		10,500			10,500
Accounts payable and other accrued liabilities		284,284			237,631
Accrued dividends and distributions		—			51,210
Acquired below market leases, net		84,518			93,250
Security deposits and prepaid rents		88,212			85,775
Total liabilities		3,524,591			3,274,820
Commitments and contingencies
Equity:
Stockholders’ Equity:
Preferred Stock: $0.01 par value, 30,000,000 authorized:
Series C Cumulative Convertible Preferred Stock, 4.375%, $131,775 and $174,999 liquidation preference, respectively ($25.00 per share), 5,270,980 and 6,999,955 issued and outstanding as of June 30, 2011 and December 31, 2010, respectively		127,312			169,067
Series D Cumulative Convertible Preferred Stock, 5.500%, $237,940 and $344,683 liquidation preference, respectively ($25.00 per share), 9,517,580 and 13,787,300 issued and outstanding as of June 30, 2011 and December 31, 2010, respectively		230,074			333,274
Common Stock: $0.01 par value, 145,000,000 authorized, 98,754,727 and 91,159,221 shares issued and outstanding as of June 30, 2011 and December 31, 2010, respectively		984			909
Additional paid-in capital		2,143,619			1,849,497
Dividends in excess of earnings		(414,668	)		(348,148	)
Accumulated other comprehensive loss, net		(16,169	)		(42,081	)
Total stockholders’ equity		2,071,152			1,962,518
Noncontrolling Interests:
Noncontrolling interests in operating partnership		49,630			52,436
Noncontrolling interests in consolidated joint ventures		13,032			39,709
Total noncontrolling interests		62,662			92,145
Total equity		2,133,814			2,054,663
Total liabilities and equity	$	5,658,405		$	5,329,483

See accompanying notes to the condensed consolidated financial statements.

5

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED INCOME STATEMENTS

(unaudited, in thousands, except share and per share data)

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Operating Revenues:
Rental	$	202,806		$	156,831		$	399,601		$	308,138
Tenant reimbursements		51,311			39,597			103,145			78,655
Construction management		13,759			1,036			15,576			2,450
Other		5			—			300			—
Total operating revenues		267,881			197,464			518,622			389,243
Operating Expenses:
Rental property operating and maintenance		72,337			53,935			144,060			106,530
Property taxes		13,962			12,748			27,433			25,469
Insurance		1,998			1,846			4,049			3,581
Construction management		11,199			471			12,936			1,118
Depreciation and amortization		76,848			59,860			150,766			117,392
General and administrative		14,077			12,574			26,482			23,093
Transactions		740			1,715			1,421			2,548
Other		—			165			90			167
Total operating expenses		191,161			143,314			367,237			279,898
Operating income		76,720			54,150			151,385			109,345
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures		1,058			955			2,266			2,933
Interest and other income		380			34			644			65
Interest expense		(39,334	)		(33,162	)		(75,416	)		(64,064	)
Tax expense		(233	)		(534	)		(661	)		(1,250	)
Loss from early extinguishment of debt		(363	)		(1,541	)		(978	)		(1,541	)
Net income		38,228			19,902			77,240			45,488
Net income attributable to noncontrolling interests		(1,525	)		(710	)		(3,035	)		(1,451	)
Net income attributable to Digital Realty Trust, Inc.		36,703			19,192			74,205			44,037
Preferred stock dividends		(4,713	)		(10,101	)		(11,235	)		(20,202	)
Net income available to common stockholders	$	31,990		$	9,091		$	62,970		$	23,835
Net income per share available to common stockholders:
Basic	$	0.33		$	0.11		$	0.67		$	0.30
Diluted	$	0.33		$	0.11		$	0.66		$	0.29
Weighted average common shares outstanding:
Basic		96,295,585			80,542,329			93,875,415			79,164,167
Diluted		97,511,811			83,021,817			95,012,965			81,450,636

See accompanying notes to the condensed consolidated financial statements.

6

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENT OF EQUITY

(unaudited, in thousands, except share data)

	Preferred Stock			Number of Common Shares		Common Stock		Additional Paid-in Capital			Accumulated Dividends in Excess of Earnings			Accumulated Other Comprehensive Loss, net			Total Stockholders’ Equity			Noncontrolling Interests in Operating Partnership			Noncontrolling Interests in Consolidated Joint Ventures			Total Noncontrolling Interests			Total Equity
Balance as of December 31, 2010	$	502,341			91,159,221	$	909	$	1,849,497		$	(348,148	)	$	(42,081	)	$	1,962,518		$	52,436		$	39,709		$	92,145		$	2,054,663
Conversion of units to common stock		—			558,970		6		6,428			—			—			6,434			(6,434	)		—			(6,434	)		—
Issuance of restricted stock, net of forfeitures		—			79,848		—		—			—			—			—			—			—			—			—
Net proceeds from sale of common stock		—			2,967,545		29		176,237			—			—			176,266			—			—			—			176,266
Exercise of stock options		—			80,303		1		3,052			—			—			3,053			—			—			—			3,053
Issuance of common stock in exchange for debentures		—			372,068		4		(11,445	)		—			—			(11,441	)		—			—			—			(11,441	)
Conversion of preferred stock		(144,955	)		3,536,772		35		144,920			—			—			—			—			—			—			—
Amortization of unearned compensation regarding share based awards		—			—		—		8,031			—			—			8,031			—			—			—			8,031
Reclassification of vested share based awards		—			—		—		(6,381	)		—			—			(6,381	)		6,381			—			6,381			—
Dividends declared on preferred stock		—			—		—		—			(11,235	)		—			(11,235	)		—			—			—			(11,235	)
Dividends and distributions on common stock and common and incentive units		—			—		—		—			(129,490	)		—			(129,490	)		(7,339	)		—			(7,339	)		(136,829	)
Contributions from noncontrolling interests in consolidated joint ventures		—			—		—		—			—			—			—			—			42			42			42
Purchase of noncontrolling interests of a consolidated joint venture		—			—		—		(26,720	)		—			—			(26,720	)		—			(26,520	)		(26,520	)		(53,240	)
Net income		—			—		—		—			74,205			—			74,205			3,234			(199	)		3,035			77,240
Other comprehensive income - foreign currency translation adjustments		—			—		—		—			—			23,800			23,800			1,237			—			1,237			25,037
Other comprehensive income - fair value of interest rate swaps		—			—		—		—			—			(907	)		(907	)		(40	)		—			(40	)		(947	)
Other comprehensive income - reclassification of accumulated other comprehensive loss to interest expense		—			—		—		—			—			3,019			3,019			155			—			155			3,174
Balance as of June 30, 2011	$	357,386			98,754,727	$	984	$	2,143,619		$	(414,668	)	$	(16,169	)	$	2,071,152		$	49,630		$	13,032		$	62,662		$	2,133,814

See accompanying notes to the condensed consolidated financial statements.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(unaudited, in thousands)

	Three months ended June 30,						Six months ended June 30,
	2011			2010			2011			2010
Net income	$	38,228		$	19,902		$	77,240		$	45,488
Other comprehensive income (loss):
Foreign currency translation adjustments		8,631			(19,232	)		25,037			(37,519	)
Decrease in fair value of interest rate swaps		(2,453	)		(1,820	)		(947	)		(6,096	)
Reclassification to interest expense from interest rate swaps		1,589			1,741			3,174			3,400
Comprehensive income		45,995			591			104,504			5,273
Comprehensive (income) loss attributable to noncontrolling interests		(1,891	)		411			(4,387	)		964
Comprehensive income attributable to Digital Realty Trust, Inc.	$	44,104		$	1,002		$	100,117		$	6,237

See accompanying notes to the condensed consolidated financial statements.

8

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Six Months Ended June 30,
	2011			2010
Cash flows from operating activities:
Net income	$	77,240		$	45,488
Adjustments to reconcile net income to net cash provided by operating activities
Loss on early extinguishment of debt-non cash portion		567			1,193
Equity in earnings of unconsolidated joint venture		(2,266	)		(2,933	)
Distributions from unconsolidated joint venture		2,000			2,000
Write-off of net assets due to early lease terminations		81			167
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases		118,520			93,940
Amortization of share-based unearned compensation		6,702			6,601
(Recovery of) allowance for doubtful accounts		(1,295	)		296
Amortization of deferred financing costs		4,961			5,335
Write-off of deferred financing costs, included in net loss on early extinguishment of debt		85			—
Amortization of debt discount/premium		1,498			2,256
Amortization of acquired in place lease value and deferred leasing costs		32,246			23,453
Amortization of acquired above market leases and acquired below market leases, net		(3,674	)		(4,704	)
Changes in assets and liabilities:
Restricted cash		2,654			2,043
Accounts and other receivables		(7,224	)		(9,017	)
Deferred rent		(27,053	)		(21,682	)
Deferred leasing costs		(7,770	)		(5,122	)
Other assets		(12,915	)		(6,561	)
Accounts payable and other accrued liabilities		4,154			14,020
Security deposits and prepaid rents		1,212			(3,701	)
Net cash provided by operating activities		189,723			143,072
Cash flows from investing activities:
Acquisitions of real estate		(17,523	)		(405,983	)
Investment in unconsolidated joint venture		(244	)		—
Deposits paid for acquisitions of real estate		(2,224	)		(25,000	)
Receipt of value added tax refund		5,623			1,818
Refundable value added tax paid		(7,674	)		(2,077	)
Change in restricted cash		118			(1,626	)
Improvements to and advances for investments in real estate		(307,890	)		(153,701	)
Improvement advances to tenants		(2,935	)		(911	)
Collection of advances from tenants for improvements		1,728			994
Net cash used in investing activities		(331,021	)		(586,486	)

See accompanying notes to the condensed consolidated financial statements.

9

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

(unaudited, in thousands)

	Six Months Ended June 30,
	2011			2010
Cash flows from financing activities:
Borrowings on revolving credit facility	$	537,431		$	291,404
Repayments on revolving credit facility		(527,500	)		(485,547	)
Borrowings on unsecured senior notes		—			117,000
Borrowings on 5.875% unsecured senior notes due 2020		—			491,480
Borrowings on 5.250% unsecured senior notes due 2021		399,100			—
Principal payments on mortgage loans		(123,645	)		(6,705	)
Principal repayments on 2026 exchangeable senior debentures		(40,457	)		(250	)
Equity component settled associated with exchange of 2026 exchangeable senior debentures		(11,783	)		—
Change in restricted cash		1,311			514
Payment of loan fees and costs		(3,825	)		(5,544	)
Capital contributions received from noncontrolling interests in joint venture		42			4,833
Gross proceeds from the sale of common stock		179,583			461,868
Common stock offering costs paid		(3,317	)		(17,183	)
Proceeds from exercise of stock options		3,053			3,638
Payment of dividends to preferred stockholders		(11,235	)		(20,202	)
Payment of dividends to common stockholders and distributions to noncontrolling interests in operating partnership		(188,039	)		(121,589	)
Purchase of noncontrolling interests in consolidated joint venture		(53,240	)		—
Net cash provided by financing activities		157,479			713,717
Net increase in cash and cash equivalents		16,181			270,303
Cash and cash equivalents at beginning of period		11,719			72,320
Cash and cash equivalents at end of period	$	27,900		$	342,623
Supplemental disclosure of cash flow information:
Cash paid for interest, including amounts capitalized	$	72,557		$	49,293
Cash paid for taxes		1,080			695
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments	$	25,037		$	(37,519	)
Decrease in accounts payable and other accrued liabilities related to change in fair value of interest rate swaps		(947	)		(6,096	)
Noncontrolling interests in operating partnership redeemed for or converted to shares of common stock		6,434			7,179
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses		126,039			80,439
Accrual of contingent purchase price for investments in real estate		—			7,440
Issuance of common stock in exchange of 2026 exchangeable senior debentures, net		230			36,989
Allocation of purchase price of real estate/investment in partnership to:
Investments in real estate		17,523			377,419
Acquired above market leases		—			9,714
Acquired below market leases		—			(26,450	)
Acquired in place lease value and deferred leasing costs		—			45,300
Cash paid for acquisition of real estate	$	17,523		$	405,983

See accompanying notes to the condensed consolidated financial statements.

10

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except unit and per unit data)

	June 30, 2011			December 31, 2010
	(unaudited)
ASSETS
Investments in real estate:
Properties:
Land	$	498,522		$	478,629
Acquired ground leases		6,796			6,374
Buildings and improvements		4,820,275			4,459,047
Tenant improvements		290,643			283,492
Total investments in properties		5,616,236			5,227,542
Accumulated depreciation and amortization		(781,871	)		(660,700	)
Net investments in properties		4,834,365			4,566,842
Investment in unconsolidated joint ventures		18,145			17,635
Net investments in real estate		4,852,510			4,584,477
Cash and cash equivalents		27,900			11,719
Accounts and other receivables, net of allowance for doubtful accounts of $1,955 and $3,250 as of June 30, 2011 and December 31, 2010, respectively		83,672			70,337
Deferred rent		218,318			190,067
Acquired above market leases, net		34,506			40,539
Acquired in place lease value and deferred leasing costs, net		322,793			334,366
Deferred financing costs, net		21,821			22,825
Restricted cash		56,928			60,062
Other assets		39,957			15,091
Total assets	$	5,658,405		$	5,329,483
LIABILITIES AND CAPITAL
Revolving credit facility	$	341,417		$	333,534
Unsecured senior notes, net of discount		1,465,587			1,066,030
Exchangeable senior debentures, net of discount		314,588			353,702
Mortgage loans, net of premiums		935,485			1,043,188
Other secured loan		10,500			10,500
Accounts payable and other accrued liabilities		284,284			237,631
Accrued dividends and distributions		—			51,210
Acquired below market leases, net		84,518			93,250
Security deposits and prepaid rents		88,212			85,775
Total liabilities		3,524,591			3,274,820
Commitments and contingencies
Capital:
Partners’ capital:
General Partner:
5,270,980 and 6,999,955 Series C Cumulative Convertible preferred units issued and outstanding, respectively, 9,517,580 and 13,787,300 Series D Cumulative Convertible preferred units issued and outstanding, respectively as of June 30, 2011 and December 31, 2010, all with a $25.00 liquidation preference per preferred unit (liquidation preference of $369,715 and $519,681, respectively)		357,386			502,341
98,754,727 and 91,159,221 common units issued and outstanding, respectively		1,729,935			1,502,258
Limited partners, 3,430,814 and 3,937,827 common units, 1,092,184 and 982,618 profits interest units and 511,848 and 543,004 class C units outstanding as of June 30, 2011 and December 31, 2010, respectively		52,057			56,215
Accumulated other comprehensive loss		(18,596	)		(45,860	)
Total partners’ capital		2,120,782			2,014,954
Noncontrolling interests in consolidated joint ventures		13,032			39,709
Total capital		2,133,814			2,054,663
Total liabilities and capital	$	5,658,405		$	5,329,483

See accompanying notes to the condensed consolidated financial statements.

11

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED INCOME STATEMENTS

(unaudited, in thousands, except unit and per unit data)

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Operating Revenues:
Rental	$	202,806		$	156,831		$	399,601		$	308,138
Tenant reimbursements		51,311			39,597			103,145			78,655
Construction management		13,759			1,036			15,576			2,450
Other		5			—			300			—
Total operating revenues		267,881			197,464			518,622			389,243
Operating Expenses:
Rental property operating and maintenance		72,337			53,935			144,060			106,530
Property taxes		13,962			12,748			27,433			25,469
Insurance		1,998			1,846			4,049			3,581
Construction management		11,199			471			12,936			1,118
Depreciation and amortization		76,848			59,860			150,766			117,392
General and administrative		14,077			12,574			26,482			23,093
Transactions		740			1,715			1,421			2,548
Other		—			165			90			167
Total operating expenses		191,161			143,314			367,237			279,898
Operating income		76,720			54,150			151,385			109,345
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures		1,058			955			2,266			2,933
Interest and other income		380			34			644			65
Interest expense		(39,334	)		(33,162	)		(75,416	)		(64,064	)
Tax expense		(233	)		(534	)		(661	)		(1,250	)
Loss from early extinguishment of debt		(363	)		(1,541	)		(978	)		(1,541	)
Net income		38,228			19,902			77,240			45,488
Net loss (income) attributable to noncontrolling interests in consolidated joint ventures		57			(150	)		199			82
Net income attributable to Digital Realty Trust, L.P.		38,285			19,752			77,439			45,570
Preferred units distributions		(4,713	)		(10,101	)		(11,235	)		(20,202	)
Net income available to common unitholders	$	33,572		$	9,651		$	66,204		$	25,368
Net income per unit available to common unitholders:
Basic	$	0.33		$	0.11		$	0.67		$	0.30
Diluted	$	0.33		$	0.11		$	0.66		$	0.29
Weighted average common units outstanding:
Basic		101,056,387			86,149,647			98,698,968			84,699,431
Diluted		102,272,613			88,629,135			99,836,518			86,985,900

See accompanying notes to the condensed consolidated financial statements.

12

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENT OF CAPITAL

(unaudited, in thousands, except unit data)

	General Partner											Limited Partners						Accumulated Other Comprehensive Loss			Noncontrolling Interests in Consolidated Joint Ventures			Total Capital
	Preferred Units						Common Units					Common Units
	Units			Amount			Units		Amount			Units			Amount
Balance as of December 31, 2010		20,787,255		$	502,341			91,159,221	$	1,502,258			5,463,449		$	56,215		$	(45,860	)	$	39,709		$	2,054,663
Conversion of limited partner common units to general partner common units		—			—			558,970		6,434			(558,970	)		(6,434	)		—			—			—
Issuance of restricted common units, net of forfeitures		—			—			79,848		—			—			—			—			—			—
Net proceeds from issuance of common units		—			—			2,967,545		176,266			—			—			—			—			176,266
Issuance of common units in connection with the exercise of stock options		—			—			80,303		3,053			—			—			—			—			3,053
Issuance of common units, net of forfeitures		—			—			—		—			130,367			—			—			—			—
Issuance of common units in exchange for debentures		—			—			372,068		(11,441	)		—			—			—			—			(11,441	)
Conversion of preferred units		(5,998,695	)		(144,955	)		3,536,772		144,955			—			—			—			—			—
Amortization of unearned compensation regarding share based awards		—			—			—		8,031			—			—			—			—			8,031
Reclassification of vested share based awards		—			—			—		(6,381	)		—			6,381			—			—			—
Distributions		—			(11,235	)		—		(129,490	)		—			(7,339	)		—			—			(148,064	)
Purchase of noncontrolling interests of a consolidated joint venture		—			—			—		(26,720	)		—			—			—			(26,520	)		(53,240	)
Contributions from noncontrolling interest in consolidated joint ventures		—			—			—		—			—			—			—			42			42
Net income		—			11,235			—		62,970			—			3,234			—			(199	)		77,240
Other comprehensive income - foreign currency translation adjustments		—			—			—		—			—			—			25,037			—			25,037
Other comprehensive income - fair value of interest rate swaps		—			—			—		—			—			—			(947	)		—			(947	)
Other comprehensive income - reclassification of accumulated other comprehensive loss to interest expense		—			—			—		—			—			—			3,174			—			3,174
Balance as of June 30, 2011		14,788,560		$	357,386			98,754,727	$	1,729,935			5,034,846		$	52,057		$	(18,596	)	$	13,032		$	2,133,814

See accompanying notes to the condensed consolidated financial statements.

13

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(unaudited, in thousands, except unit data)

	Three months ended June 30,						Six months ended June 30,
	2011			2010			2011			2010
Net income	$	38,228		$	19,902		$	77,240		$	45,488
Other comprehensive income (loss):
Foreign currency translation adjustments		8,631			(19,232	)		25,037			(37,519	)
Decrease in fair value of interest rate swaps		(2,453	)		(1,820	)		(947	)		(6,096	)
Reclassification to interest expense from interest rate swaps		1,589			1,741			3,174			3,400
Comprehensive income	$	45,995		$	591		$	104,504		$	5,273

See accompanying notes to the condensed consolidated financial statements.

14

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Six Months Ended June 30,
	2011			2010
Cash flows from operating activities:
Net income	$	77,240		$	45,488
Adjustments to reconcile net income to net cash provided by operating activities
Loss on early extinguishment of debt-non cash portion		567			1,193
Equity in earnings of unconsolidated joint venture		(2,266	)		(2,933	)
Distributions from unconsolidated joint venture		2,000			2,000
Write-off of net assets due to early lease terminations		81			167
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases		118,520			93,940
Amortization of share-based unearned compensation		6,702			6,601
(Recovery of) allowance for doubtful accounts		(1,295	)		296
Amortization of deferred financing costs		4,961			5,335
Write-off of deferred financing costs, included in net loss on early extinguishment of debt		85			—
Amortization of debt discount/premium		1,498			2,256
Amortization of acquired in place lease value and deferred leasing costs		32,246			23,453
Amortization of acquired above market leases and acquired below market leases, net		(3,674	)		(4,704	)
Changes in assets and liabilities:
Restricted cash		2,654			2,043
Accounts and other receivables		(7,224	)		(9,017	)
Deferred rent		(27,053	)		(21,682	)
Deferred leasing costs		(7,770	)		(5,122	)
Other assets		(12,915	)		(6,561	)
Accounts payable and other accrued liabilities		4,154			14,020
Security deposits and prepaid rents		1,212			(3,701	)
Net cash provided by operating activities		189,723			143,072
Cash flows from investing activities:
Acquisitions of real estate		(17,523	)		(405,983	)
Investment in unconsolidated joint venture		(244	)		—
Deposits paid for acquisitions of real estate		(2,224	)		(25,000	)
Receipt of value added tax refund		5,623			1,818
Refundable value added tax paid		(7,674	)		(2,077	)
Change in restricted cash		118			(1,626	)
Improvements to and advances for investments in real estate		(307,890	)		(153,701	)
Improvement advances to tenants		(2,935	)		(911	)
Collection of advances from tenants for improvements		1,728			994
Net cash used in investing activities		(331,021	)		(586,486	)

See accompanying notes to the condensed consolidated financial statements.

15

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

(unaudited, in thousands)

	Six Months Ended June 30,
	2011			2010
Cash flows from financing activities:
Borrowings on revolving credit facility	$	537,431		$	291,404
Repayments on revolving credit facility		(527,500	)		(485,547	)
Borrowings on unsecured senior notes		—			117,000
Borrowings on 5.875% unsecured senior notes due 2020		—			491,480
Borrowings on 5.250% unsecured senior notes due 2021		399,100			—
Principal payments on mortgage loans		(123,645	)		(6,705	)
Principal repayments on 2026 exchanagable senior debentures		(40,457	)		(250	)
Capital component settled associated with exchange of 2026 exchangeable senior debentures		(11,783	)		—
Change in restricted cash		1,311			514
Payment of loan fees and costs		(3,825	)		(5,544	)
Capital contributions received from noncontrolling interests in joint venture		42			4,833
General partner contributions		179,319			448,323
Payment of distributions to preferred unitholders		(11,235	)		(20,202	)
Payment of distributions to common unitholders		(188,039	)		(121,589	)
Purchase of noncontrolling interests in consolidated joint venture		(53,240	)		—
Net cash provided by financing activities		157,479			713,717
Net increase in cash and cash equivalents		16,181			270,303
Cash and cash equivalents at beginning of period		11,719			72,320
Cash and cash equivalents at end of period	$	27,900		$	342,623
Supplemental disclosure of cash flow information:
Cash paid for interest, including amounts capitalized	$	72,557		$	49,293
Cash paid for taxes		1,080			695
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments	$	25,037		$	(37,519	)
Decrease in accounts payable and other accrued liabilities related to change in fair value of interest rate swaps		(947	)		(6,096	)
Noncontrolling interest contribution to consolidated joint venture		6,434			7,179
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses		126,039			80,439
Accrual of contingent purchase price for investments in real estate		—			7,440
Issuance of common stock in exchange of 2026 exchangeable senior debentures, net		230			36,989
Allocation of purchase price of real estate/investment in partnership to:
Investments in real estate		17,523			377,419
Acquired above market leases		—			9,714
Acquired below market leases		—			(26,450	)
Acquired in place lease value and deferred leasing costs		—			45,300
Cash paid for acquisition of real estate	$	17,523		$	405,983

See accompanying notes to the condensed consolidated financial statements.

16

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

June 30, 2011 and 2010

(unaudited)

1. Organization and Description of Business

Digital Realty Trust, Inc. through its controlling interest in Digital Realty Trust, L.P. (the Operating Partnership) and the subsidiaries of the Operating Partnership (collectively, we, our, us or the Company) is engaged in the business of owning, acquiring, developing, redeveloping and managing technology-related real estate. The Company is focused on providing Turn-Key Datacenter^® and Powered Base Building^® datacenter solutions for domestic and international tenants across a variety of industry verticals ranging from information technology and Internet enterprises, to manufacturing and financial services. As of June 30, 2011, our portfolio consisted of 96 properties, excluding two properties held as investments in unconsolidated joint ventures, of which 81 are located throughout North America, 14 are located in Europe and one is located in Asia. Our properties are diversified in major markets where corporate datacenter and technology tenants are concentrated, including the Boston, Chicago, Dallas, Los Angeles, New York Metro, Northern Virginia, Phoenix, San Francisco and Silicon Valley metropolitan areas in the U.S., the Amsterdam, Dublin, London and Paris markets in Europe and Singapore in Asia. The portfolio consists of Internet gateway and corporate datacenter properties, technology manufacturing properties and regional or national headquarters of technology companies.

The Operating Partnership was formed on July 21, 2004 in anticipation of our initial public offering (IPO) on November 3, 2004 and commenced operations on that date. As of June 30, 2011, we own a 95.1% common interest and a 100% preferred interest in the Operating Partnership. As sole general partner, we have control over the Operating Partnership. The limited partners of the Operating Partnership do not have rights to replace us as the general partner nor do they have participating rights, although they do have certain protective rights.

2. Summary of Significant Accounting Policies

(a) Principles of Consolidation and Basis of Presentation

The accompanying interim condensed consolidated financial statements include all of the accounts of Digital Realty Trust, Inc., the Operating Partnership and the subsidiaries of the Operating Partnership. Intercompany balances and transactions have been eliminated.

The accompanying interim condensed consolidated financial statements are unaudited, but have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) for interim financial information and in compliance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, they do not include all of the disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments necessary for a fair presentation have been included. All such adjustments are considered to be of a normal recurring nature, except as otherwise indicated. The results of operations for the interim periods are not necessarily indicative of the results to be obtained for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our annual report on Form 10-K for the year ended December 31, 2010.

The notes to the condensed consolidated financial statements of Digital Realty Trust, Inc. and the Operating Partnership have been combined to provide the following benefits:

• enhancing investors’ understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both the Company and the Operating Partnership; and

• creating time and cost efficiencies through the preparation of one set of notes instead of two separate sets of notes.

There are few differences between the Company and the Operating Partnership, which are reflected in these condensed consolidated financial statements. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how Digital Realty Trust, Inc. and the Operating Partnership operate as an interrelated consolidated company. Digital Realty Trust, Inc.’s only material asset is its ownership of partnership interests of the Operating Partnership. As a result, Digital Realty Trust, Inc. does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public equity from time to time and guaranteeing certain unsecured debt of the Operating Partnership. Digital Realty Trust, Inc. itself does not hold any indebtedness but guarantees some of the unsecured debt of the Operating Partnership, as disclosed in these notes. The Operating Partnership holds substantially all the assets of the Company and holds the ownership interests in the Company’s joint ventures. The Operating Partnership conducts the operations of the business and is structured as a

17

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to the Operating Partnership in exchange for partnership units, the Operating Partnership generates the capital required by the Company’s business through the Operating Partnership’s operations, by the Operating Partnership’s direct or indirect incurrence of indebtedness or through the issuance of partnership units.

The presentation of noncontrolling interests in operating partnership, stockholder’s equity and partners’ capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of the Operating Partnership. The common limited partnership interests held by the limited partners in the Operating Partnership are presented as limited partners’ capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in the Operating Partnership are presented as general partner’s capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders’ equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The differences in the presentations between stockholders’ equity and partners’ capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Operating Partnership levels.

To help investors understand the significant differences between the Company and the Operating Partnership, these condensed consolidated financial statements present the following separate sections for each of the Company and the Operating Partnership:

• condensed consolidated face financial statements; and

• the following notes to the condensed consolidated financial statements:

• Debt of the Company and Debt of the Operating Partnership;

• Income per Share and Income per Unit; and

• Equity and Accumulated Other Comprehensive Loss, Net of the Company and Capital and Comprehensive Income of the Operating Partnership.

In the sections that combine disclosure of Digital Realty Trust, Inc. and the Operating Partnership, these notes refer to actions or holdings as being actions or holdings of the Company. Although the Operating Partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the Company is appropriate because the business is one enterprise and the Company operates the business through the Operating Partnership.

(b) Cash Equivalents

For the purpose of the condensed consolidated statements of cash flows, we consider short-term investments with original maturities of 90 days or less to be cash equivalents. As of June 30, 2011, cash equivalents consist of investments in money market instruments.

(c) Share Based Compensation

We account for share based compensation using the fair value method of accounting. The estimated fair value of the stock options granted by us is being amortized on a straight-line basis over the vesting period of the stock options. The estimated fair value of the long-term incentive units and Class C Units (discussed in note 12(b)) granted by us is being amortized on a straight-line basis over the expected service period.

For share based compensation awards with performance conditions, we estimate the fair value of the award for each of the possible performance condition outcomes and amortize the compensation cost based on management’s projected performance outcome. In the instance management’s projected performance outcome changes prior to the final measurement date, compensation cost is adjusted accordingly.

18

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

(d) Income Taxes

Digital Realty Trust, Inc. (the Parent Company) has elected to be treated and believes that it has been organized and has operated in a manner that has enabled the Parent Company to qualify as a REIT for federal income tax purposes. As a REIT, the Parent Company generally is not required to pay federal corporate income taxes on its taxable income to the extent it is currently distributed to its stockholders.

However, qualification and taxation as a REIT depend upon the Parent Company’s ability to meet the various qualification tests imposed under the Internal Revenue Code of 1986, as amended (the Code), including tests related to annual operating results, asset composition, distribution levels and diversity of stock ownership. Accordingly, no assurance can be given that the Parent Company has been organized or has operated or will continue to operate in a manner so as to qualify or remain qualified as a REIT. If the Parent Company fails to qualify as a REIT in any taxable year, it will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates.

The Operating Partnership is a partnership and is not required to pay federal income tax. Instead, taxable income is allocated to its partners, who include such amounts on their federal income tax returns. As such, no provision for federal income taxes has been included in the Operating Partnership’s accompanying condensed consolidated financial statements.

Even if the Parent Company and the Operating Partnership are not subject to federal income taxes, they are taxed in certain states in which they operate. The Company is also taxed in non-U.S. countries where it operates that do not recognize U.S. REITs under their respective tax laws. The Company’s consolidated taxable REIT subsidiary is subject to both federal and state income taxes to the extent there is taxable income. Accordingly, the Company recognizes and accrues income taxes for its taxable REIT subsidiary, certain states and non-U.S. jurisdictions, as appropriate.

We assess our significant tax positions in accordance with U.S. GAAP for all open tax years and determine whether we have any material unrecognized liabilities from uncertain tax benefits. If a tax position is not considered “more-likely-than-not” to be sustained solely on its technical merits, no benefits of the tax position are to be recognized (for financial statement purposes). As of June 30, 2011 and December 31, 2010, we have no assets or liabilities for uncertain tax positions. We classify interest and penalties from significant uncertain tax positions as interest expense and operating expense, respectively, in our condensed consolidated statements of operations. For the three and six months ended June 30, 2011 and 2010, we had no such interest or penalties. The tax years 2007 through 2010 remain open to examination by the major taxing jurisdictions with which the Parent Company and its subsidiaries file tax returns.

See Note 9 for further discussion on income taxes.

(e) Presentation of Transactional-based Taxes

We account for transactional-based taxes, such as value added tax, or VAT, for our international properties on a net basis.

(f) Asset Retirement Obligations

We record accruals for estimated retirement obligations as required by current accounting guidance. The amount of asset retirement obligations relates primarily to estimated asbestos removal costs at the end of the economic life of properties that were built before 1984. As of June 30, 2011 and December 31, 2010, the amount included in accounts payable and other accrued liabilities on our condensed consolidated balance sheets was approximately $1.3 million.

(g) Assets and Liabilities Measured at Fair Value

Fair value under U.S. GAAP is a market-based measurement, not an entity-specific measurement. Therefore, our fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair-value measurements, we use a fair-value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair-value measurement is based on inputs from different levels of the fair-value hierarchy, the level in the fair-value hierarchy within which the entire fair-value measurement falls is based on the lowest level input that is significant to the fair-value measurement in its entirety. Our assessment of the significance of a particular input to the fair-value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

(h) Construction Management Revenue

Construction management revenue is recognized under the percentage-of-completion method of accounting. Revenues are determined by measuring the percentage of total costs incurred to date to estimated total costs for each construction management contract based on current estimates of costs to complete. Contract costs include all labor and benefits, materials, subcontracts, and an allocation of indirect costs related to contract performance. Indirect costs are allocated to projects based upon labor hours charged. As long-term design-build projects extend over one or more years, revisions in cost and estimated earnings during the course of the work are reflected in the accounting period in which the facts which require the revision become known. At the time a loss on a design-build project becomes known, the entire amount of the estimated ultimate loss is recognized in the condensed consolidated financial statements. Change orders are recognized when they are approved by the client.

Costs and estimated earnings in excess of billings on uncompleted construction management projects are included in other assets in the condensed consolidated balance sheets. Billings in excess of costs and estimated earnings on uncompleted construction management projects are included in accounts payable and accrued liabilities in the condensed consolidated balance sheets. Customers are billed on a monthly basis at the end of each month, which can be in advance of work performed.

(i) Transactions Expense

Transactions expense includes acquisition-related expenses and other business development expenses, which are expensed as incurred. Acquisition-related expenses include closing costs, broker commissions and other professional fees, including legal and accounting fees related to acquisitions and potential acquisitions.

(j) Capitalization of Costs

Direct and indirect project costs that are clearly associated with the development and redevelopment of properties are capitalized as incurred. Project costs include all costs directly associated with the development or redevelopment of a property, including construction costs, interest, property taxes, insurance, legal fees and costs of personnel working on the project. Indirect costs that do not clearly relate to the projects under development/redevelopment are not capitalized and are charged to expense as incurred.

Capitalization of costs begins when the activities necessary to get the development/redevelopment project ready for its intended use begins, which include costs incurred before the beginning of construction. Capitalization of costs ceases when the development/redevelopment project is substantially complete and ready for its intended use. Determining when a development/redevelopment project commences, and when it is substantially complete and ready for its intended use involves a degree of judgment. We generally consider a development/redevelopment project to be substantially complete and ready for its intended use upon recommissioning, which is when the redeveloped/developed project has been tested at full load, or receipt of a certificate of occupancy. We cease cost capitalization if activities necessary for the development/redevelopment of the property have been suspended. Capitalized costs are allocated to the specific components of a project that are benefited.

(k) Management’s Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates made. On an on-going basis, we evaluate our estimates, including those related to acquiring, developing and assessing the carrying values of our real estate properties, accrued liabilities, performance-based equity compensation plans, and Digital Realty Trust, Inc.’s qualification as a REIT. We base our estimates on historical experience, current market conditions, and various other assumptions that are believed to be reasonable under the circumstances. Actual results may vary from those estimates and those estimates could vary under different assumptions or conditions.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

(l) Segment Information

All of our properties generate similar revenues and expenses related to tenant rent and reimbursements and operating expenses. The delivery of our products is consistent across all properties and although services are provided to a wide range of customers, the types of services provided to them are limited to a few core principles. As such, the properties in our portfolio have similar economic characteristics and the nature of the products and services provided to our customers and the method to distribute such services are consistent throughout the portfolio. Consequently, our properties qualify for aggregation into one reporting segment.

(m) Reclassifications

Certain reclassifications to prior year amounts have been made to conform to the current year presentation. During the three and six months ended June 30, 2010, $1.0 million and $2.5 million was reclassified from rental revenue to construction management revenue, respectively, and $0.5 million and $1.1 million was reclassified from rental property operating and maintenance expense to construction management expense, respectively.

3. Acquisitions

We acquired the following real estate property during the six months ended June 30, 2011:

Location	Metropolitan Area	Date Acquired	Amount (in millions)
Loudoun Parkway North (1)	Northern Virginia	April 15, 2011	$	17.3

(1) Represents vacant land which is not included in our operating property count.

4. Acquired Intangible Assets and Liabilities

The following summarizes our acquired intangible assets (acquired in place lease value and acquired above-market lease value) and intangible liabilities (acquired below-market lease value) as of June 30, 2011 and December 31, 2010.

	Balance as of
(Amounts in thousands)	June 30, 2011			December 31, 2010
Acquired in place lease value:
Gross amount	$	518,357		$	515,958
Accumulated amortization		(290,853	)		(261,978	)
Net	$	227,504		$	253,980
Acquired above-market lease value:
Gross amount	$	88,126		$	87,622
Accumulated amortization		(53,620	)		(47,083	)
Net	$	34,506		$	40,539
Acquired below-market lease value:
Gross amount	$	191,940		$	189,990
Accumulated amortization		(107,422	)		(96,740	)
Net	$	84,518		$	93,250

Amortization of acquired below-market lease value, net of acquired above-market lease value, resulted in an increase to rental revenues of $1.9 million and $2.4 million for the three months ended June 30, 2011 and 2010, respectively, and $3.7 million and $4.7 million for the six months ended June 30, 2011 and 2010, respectively. The expected average

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

remaining lives for acquired below-market leases and acquired above-market leases is 4.8 years and 3.6 years, respectively, as of June 30, 2011. Estimated annual amortization of acquired below-market lease value, net of acquired above-market lease value, for each of the five succeeding years, commencing January 1, 2012 is as follows:

(Amounts in thousands)
2012	$	6,546
2013		7,115
2014		5,754
2015		5,088
2016		4,208

Costs associated with extending or renewing acquired leases are capitalized as exercised and classified as deferred leasing cost. Amortization of acquired in place lease value (a component of depreciation and amortization expense) was $13.5 million and $10.2 million for the three months ended June 30, 2011 and 2010, respectively, and $27.8 million and $20.1 million for the six months ended June 30, 2011 and 2010, respectively. The expected average amortization period for acquired in place lease value is 4.5 years as of June 30, 2011. The weighted average period prior to the next renewal or extension related to remaining contractual life for acquired leases is 3.9 years as of June 30, 2011. Estimated annual amortization of acquired in place lease value for each of the five succeeding years, commencing January 1, 2012 is as follows:

(Amounts in thousands)
2012	$	42,321
2013		37,960
2014		33,062
2015		24,816
2016		16,371

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

5. Debt of the Company

In this Note 5, the “Company” refers only to Digital Realty Trust, Inc. and not to any of its subsidiaries.

The Company itself does not have any indebtedness. All debt is held directly or indirectly by the Operating Partnership.

Guarantee of Debt

The Company has guaranteed some of the Operating Partnership’s debt. The Company guarantees the Operating Partnership’s obligations with respect to the 2026 Debentures, the 2029 Debentures, the 2015 Notes, the 2020 Notes, the 2021 Notes (each, as defined in Note 6) and its unsecured senior notes sold to Prudential (as defined in Note 6) pursuant to the Prudential shelf facility. The Company is also the guarantor of the Operating Partnership’s obligations under its revolving credit facility.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

6. Debt of the Operating Partnership

A summary of outstanding indebtedness of the Operating Partnership as of June 30, 2011 and December 31, 2010, respectively, is as follows (in thousands):

Indebtedness	Interest Rate at June 30, 2011	Maturity Date	Principal Outstanding June 30, 2011			Principal Outstanding December  31, 2010
Revolving credit facility	Various (1)	Aug. 31, 2011 (2)	$	341,417	(3)	$	333,534	(3)
Unsecured senior notes:
Prudential Shelf Facility:
Series A	7.000%	Jul. 24, 2011		25,000			25,000
Series B	9.320%	Nov. 5, 2013		33,000			33,000
Series C	9.680%	Jan. 6, 2016		25,000			25,000
Series D	4.570%	Jan. 20, 2015		50,000			50,000
Series E	5.730%	Jan. 20, 2017		50,000			50,000
Series F	4.500%	Feb. 3, 2015		17,000			17,000
Total Prudential Shelf Facility				200,000			200,000
Senior Notes:
4.50% notes due 2015	4.500%	Jul. 15, 2015		375,000			375,000
5.875% notes due 2020	5.875%	Feb. 1, 2020		500,000			500,000
5.25% notes due 2021	5.250%	Mar. 15, 2021		400,000			—
Unamortized discounts				(9,413	)		(8,970	)
Total senior notes, net of discount				1,265,587			866,030
Total unsecured senior notes, net of discount				1,465,587			1,066,030
Exchangeable senior debentures:
4.125% exchangeable senior debentures due 2026	4.125%	Aug. 15, 2026 (4)		48,301			88,758
5.50% exchangeable senior debentures due 2029	5.50%	Apr. 15, 2029 (5)		266,400			266,400
Unamortized discount				(113	)		(1,456	)
Total exchangeable senior debentures, net of discount				314,588			353,702

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

Indebtedness	Interest Rate at June 30, 2011	Maturity Date	Principal Outstanding June 30, 2011			Principal Outstanding December  31, 2010
Mortgage loans:
Secured Term Debt (6)(7)	5.65%	Nov. 11, 2014		140,186			141,465
3 Corporate Place (7)(8)	6.72%	Aug. 1, 2011		—	(15)		80,000
200 Paul Avenue 1-4 (7)	5.74%	Oct. 8, 2015		75,325			76,179
2045 & 2055 LaFayette Street (7)	5.93%	Feb. 6, 2017		65,995			66,437
Mundells Roundabout	3-month GBP LIBOR + 1.20% (9)	Nov. 30, 2013		68,747	(10)		66,858	(10)
600 West Seventh Street	5.80%	Mar. 15, 2016		53,443			54,157
34551 Ardenwood Boulevard 1-4 (7)	5.95%	Nov. 11, 2016		53,967			54,306
1100 Space Park Drive (7)	5.89%	Dec. 11, 2016		53,954			54,296
1350 Duane Avenue/3080 Raymond Street (7)	5.42%	Oct. 1, 2012		52,800			52,800
150 South First Street (7)	6.30%	Feb. 6, 2017		51,832			52,154
114 Rue Ambroise Croizat	3-month EURIBOR + 1.35% (9)	Jan. 18, 2012		44,534	(11)		41,430	(11)
Clonshaugh Industrial Estate II (8)	3-month EURIBOR + 4.50% (9)	Sep. 4, 2014		43,506	(11)		40,152	(11)
1500 Space Park Drive (7)	6.15%	Oct. 5, 2013		38,921			39,941
2334 Lundy Place (7)	5.96%	Nov. 11, 2016		39,250			39,496
Unit 9, Blanchardstown Corporate Park	3-month EURIBOR + 1.35% (9)	Jan. 18, 2012		38,289	(11)		35,620	(11)
Cressex 1 (13)	5.68%	Oct. 16, 2014		28,944	(10)		28,388	(10)
6 Braham Street (8)	3-month GBP LIBOR + 0.90% (9)	Apr. 10, 2011		—	(15)		19,515	(10)
1201 Comstock Street (7)(8)	1-month LIBOR + 3.50% (9)	Jun. 24, 2012 (2)		16,576			16,976
Datacenter Park — Dallas	5.00%	Sep. 15, 2011		—	(15)		16,150
Paul van Vlissingenstraat 16	3-month EURIBOR + 1.60% (9)	Jul. 18, 2013		15,024	(11)		13,978	(11)
Chemin de l’Epinglier 2	3-month EURIBOR + 1.50% (9)	Jul. 18, 2013		10,870	(11)		10,113	(11)
800 Central Expressway (7)	1-month LIBOR + 4.75%	Jun. 9, 2013		10,000			10,000
Gyroscoopweg 2E-2F (12)	3-month EURIBOR + 1.50% (9)	Oct. 18, 2013		9,566	(11)		8,900	(11)
1125 Energy Park Drive (7)	7.62% (14)	Mar. 1, 2032		8,983			9,060
Manchester Technopark (13)	5.68%	Oct. 16, 2014		8,805	(10)		8,636	(10)
731 East Trade Street	8.22%	Jul. 1, 2020		4,946			5,080
Unamortized net premiums				1,022			1,101
Total mortgage loans, net of premiums				935,485			1,043,188
Other secured loan:
800 Central Expressway Mezzanine (7)	1-month LIBOR + 8.50%	Jun. 9, 2013		10,500			10,500
Total other secured loan				10,500			10,500
Total indebtedness			$	3,067,577		$	2,806,954

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

(1) The interest rate under our revolving credit facility equals either (i) US LIBOR, EURIBOR and GBP LIBOR (ranging from 1- to 6-month maturities) plus a margin of between 1.10% and 2.00% or (ii) the greater of (x) the base rate announced by the lender and (y) 1/2 of 1% per annum above the federal funds rate, plus a margin of between 0.100%-—1.000%. In each case, the margin is based on our total leverage ratio. We incur a fee ranging from 0.125% to 0.20% for the unused portion of our unsecured revolving credit facility.

(2) A one-year extension is available, which we may exercise if certain conditions are met.

(3) Balances as of June 30, 2011 and December 31, 2010 are as follows (balances, in thousands):

Denomination of Draw	Balance as of June 30, 2011			Weighted-average interest rate			Balance as of December 31, 2010			Weighted- average interest rate
US ($)	$	251,000			1.39	%	$	312,500			1.40	%
Euro (€)		18,655	(a)		2.50	%		—			—
British Sterling (£)		71,762	(b)		1.83	%		21,034	(b)		1.69	%
Total	$	341,417			1.54	%	$	333,534			1.42	%

(a) Based on exchange rate of $1.45 to €1.00 as of June 30, 2011.

(b) Based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

(4) The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of August 15, 2011, August 15, 2016 and August 15, 2021. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on August 18, 2011.

(5) The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of April 15, 2014, April 15, 2019 and April 15, 2024. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on April 18, 2014.

(6) This amount represents six mortgage loans secured by our interests in 36 NE 2nd Street, 3300 East Birch Street, 100 & 200 Quannapowitt Parkway, 300 Boulevard East, 4849 Alpha Road, and 11830 Webb Chapel Road. Each of these loans is cross-collateralized by the six properties.

(7) The respective borrower's assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person.

(8) The Operating Partnership or its subsidiary provides a limited recourse guarantee with respect to this loan.

(9) We have entered into interest rate swap or interest rate cap agreements as a cash flow hedge for interest generated by these US LIBOR, EURIBOR and GBP LIBOR based loans. See note 13 for further information.

(10) Based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

(11) Based on exchange rate of $1.45 to €1.00 as of June 30, 2011 and $1.34 to €1.00 as of December 31, 2010.

(12) This loan is also secured by a €1.3 million letter of credit.

(13) These loans are also secured by a £7.8 million letter of credit. These loans are cross-collateralized by the two properties.

(14) If the loan is not repaid by March 1, 2012, the interest rate increases to the greater of 9.62% or the treasury rate then in effect plus 2%. Subject to a prepayment lock-out period through December 2011.

(15) These mortgages loans were repaid in full; 6 Braham Street (April 2011), 3 Corporate Place (May 2011) and Datacenter Park — Dallas (June 2011). Net loss from early extinguishment of debt related to prepayment costs on 3 Corporate Place amounted to $0.3 million for the three and six months ended June 30, 2011.

Revolving Credit Facility

As of June 30, 2011, our revolving credit facility had a total capacity of $750.0 million. Our revolving credit facility matures on August 31, 2011, subject to a one-year extension option. The bank group is obligated to grant the extension option provided we give proper notice, we make certain representations and warranties and no default exists under the revolving credit facility. As of June 30, 2011, borrowings under the revolving credit facility bore interest at a blended rate of 1.39% (U.S), 2.50% (Euro) and 1.83% (GBP), which are based on 1-month LIBOR, 1-month EURIBOR and 1-month GBP LIBOR, respectively, plus a margin of 1.20%. The revolving credit facility has a $515.0 million sub-facility for multicurrency advances in British Pounds Sterling, Canadian Dollars, Euros, and Swiss Francs. We intend to use available borrowings under the revolving credit facility to, among other things, finance the acquisition of additional properties, fund tenant improvements and capital expenditures, fund development and redevelopment activities and to provide for working capital and other corporate purposes, including potentially for the repurchase, redemption or retirement of outstanding debt securities. As of June 30, 2011, approximately $341.4 million was drawn under this facility and $30.5 million of letters of credit were issued.

The credit facility contains various restrictive covenants, including limitations on our ability to incur additional indebtedness, make certain investments or merge with another company, and requirements to maintain financial coverage ratios as well as a pool of unencumbered assets. In addition, a downgrade in Digital Realty Trust, Inc.’s credit rating below investment grade may trigger additional payments or other consequences under our credit facility. In addition, except to enable Digital Realty Trust, Inc. to maintain its status as a REIT for federal income tax purposes or as may otherwise be required to avoid the imposition of income or excise taxes on Digital Reality Trust, Inc., we are not permitted during any four consecutive fiscal quarters to make distributions with respect to common stock or other equity interests in an aggregate amount in excess of 95% of Funds From Operations, as defined in the credit agreement, for such period, subject to certain other adjustments. As of June 30, 2011, we were in compliance with all of such covenants.

26

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

During the three months ended June 30, 2011 and 2010, we capitalized interest of approximately $4.2 million and $2.5 million, respectively, and $8.9 million and $4.4 million during the six months ended June 30, 2011 and 2010, respectively.

Unsecured Senior Notes

Prudential Shelf Facility

On January 20, 2010, the Operating Partnership closed the sale of $100.0 million aggregate principal amount of its senior unsecured term notes to Prudential Investment Management, Inc. and certain of its affiliates, or, collectively, Prudential, pursuant to the Prudential shelf facility. The notes were issued in two series referred to as the series D and series E notes. The series D notes have a principal amount of $50.0 million, an interest-only rate of 4.57% per annum and a five-year maturity, and the series E notes have a principal amount of $50.0 million, an interest-only rate of 5.73% per annum and a seven-year maturity. On February 3, 2010, the Operating Partnership closed the sale of an additional $17.0 million aggregate principal amount of its senior unsecured term notes, which we refer to as the series F notes, to Prudential pursuant to the Prudential shelf facility. The series F notes have an interest-only rate of 4.50% per annum and a five-year maturity. We used the proceeds of the series D, series E and series F notes to fund acquisitions, to temporarily repay borrowings under our revolving credit facility, to fund working capital and for general corporate purposes. As of June 30, 2011 and December 31, 2010, there was $200.0 million of unsecured senior notes outstanding. On December 8, 2010, the Operating Partnership and Prudential entered into an amendment to the Note Purchase and Private Shelf Agreement, increasing the capacity of the Prudential shelf facility from $200.0 million to $250.0 million.

4.500% Notes due 2015

On July 8, 2010, the Operating Partnership issued $375.0 million aggregate principal amount of notes, maturing on July 15, 2015 with an interest rate of 4.500% per annum (the 2015 Notes). The purchase price paid by the initial purchasers was 99.697% of the principal amount. The 2015 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 2015 Notes is payable on January 15 and July 15 of each year, beginning on January 15, 2011. The net proceeds from the offering after deducting the original issue discount of approximately $1.1 million and underwriting commissions and expenses of approximately $3.1 million was approximately $370.8 million. We used the net proceeds from the offering to fund a portion of the purchase price of the 365 Main Portfolio. The 2015 Notes have been reflected net of discount in the condensed consolidated balance sheet.

The indenture governing the 2015 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At June 30, 2011, we were in compliance with each of these financial covenants.

We entered into a registration rights agreement whereby the Operating Partnership agreed to conduct an offer to exchange the 2015 Notes for a new series of publicly registered notes with substantially identical terms. If the Operating Partnership did not fulfill certain of its obligations under the registration rights agreement, it would have been required to pay liquidated damages to the holders of the 2015 Notes. No separate contingent obligation was recorded as no liquidated damages became probable. We filed a registration statement with the U.S. Securities and Exchange Commission in October 2010 in connection with the exchange offer, which was declared effective in December 2010. We completed the exchange offer on January 19, 2011.

5.875% Notes due 2020

On January 28, 2010, the Operating Partnership issued $500.0 million aggregate principal amount of notes, maturing on February 1, 2020 with an interest rate of 5.875% per annum (the 2020 Notes). The purchase price paid by the initial purchasers was 98.296% of the principal amount. The 2020 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 2020 Notes is payable on February 1 and August 1 of each year, beginning on August 1, 2010. The net proceeds from the offering after deducting the original issue discount of approximately $8.5 million and underwriting commissions and expenses of approximately $4.4 million was approximately $487.1 million. We used the net proceeds from the offering to temporarily repay our borrowings under our revolving credit facility, fund development and redevelopment opportunities and for general corporate purposes. The 2020 Notes have been reflected net of discount in the condensed consolidated balance sheet.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

The indenture governing the 2020 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At June 30, 2011, we were in compliance with each of these financial covenants.

We entered into a registration rights agreement whereby the Operating Partnership agreed to conduct an offer to exchange the 2020 Notes for a new series of publicly registered notes with substantially identical terms. If the Operating Partnership did not fulfill certain of its obligations under the registration rights agreement, it would have been required to pay liquidated damages to the holders of the 2020 Notes. No separate contingent obligation was recorded as no liquidated damages became probable. We filed a registration statement with the U.S. Securities and Exchange Commission in June 2010 in connection with the exchange offer, which was declared effective in September 2010. We completed the exchange offer on November 5, 2010.

5.250% Notes due 2021

On March 8, 2011, the Operating Partnership issued $400.0 million aggregate principal amount of notes, maturing on March 15, 2021 with an interest rate of 5.250% per annum (the 2021 Notes). The purchase price paid by the initial purchasers was 99.775% of the principal amount. The 2021 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 2021 Notes is payable on March 15 and September 15 of each year, beginning on September 15, 2011. The net proceeds from the offering after deducting the original issue discount of approximately $0.9 million and underwriting commissions and expenses of approximately $3.6 million was approximately $395.5 million. We used the net proceeds from this offering to temporarily repay borrowings under our revolving credit facility, to acquire additional properties, to fund development and redevelopment opportunities and for general working capital purposes, including potentially for the repurchase, redemption or retirement of outstanding debt securities. The 2021 Notes have been reflected net of discount in the condensed consolidated balance sheet.

The indenture governing the 2021 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At June 30, 2011, we were in compliance with each of these financial covenants.

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DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

Exchangeable Senior Debentures

4.125% Exchangeable Senior Debentures due 2026

On August 15, 2006, the Operating Partnership issued $172.5 million of its 4.125% exchangeable senior debentures due August 15, 2026 (the 2026 Debentures). Costs incurred to issue the 2026 Debentures were approximately $5.4 million, net of the amount allocated to the equity component of the debentures. These costs are being amortized over a period of five years, which represents the estimated term of the 2026 Debentures, and are included in deferred financing costs, net in the condensed consolidated balance sheet. The 2026 Debentures are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc.

Interest is payable on August 15 and February 15 of each year beginning February 15, 2007 until the maturity date of August 15, 2026. The 2026 Debentures bear interest at 4.125% per annum and contain an exchange settlement feature, which provides that the 2026 Debentures may, under certain circumstances, be exchangeable for cash (up to the principal amount of the 2026 Debentures) and, with respect to any excess exchange value, into cash, shares of Digital Realty Trust, Inc. common stock or a combination of cash and shares of Digital Realty Trust, Inc. common stock at an exchange rate that was initially 30.6828 shares per $1,000 principal amount of 2026 Debentures. The exchange rate on the 2026 Debentures is subject to adjustment for certain events, including, but not limited to, certain dividends on Digital Realty Trust, Inc. common stock in excess of $0.265 per share per quarter (the “reference dividend”). Effective June 13, 2011, the exchange rate has been adjusted to 32.2730 shares per $1,000 principal amount of 2026 Debentures as a result of the aggregate dividends in excess of the reference dividend that Digital Realty Trust, Inc. declared and paid on its common stock beginning with the quarter ended December 31, 2006 and through the quarter ended June 30, 2011.

Prior to August 18, 2011, the Operating Partnership may not redeem the 2026 Debentures except to preserve Digital Realty Trust, Inc.’s status as a REIT for U.S. federal income tax purposes. On or after August 18, 2011, at the Operating Partnership’s option, the 2026 Debentures are redeemable in cash in whole or in part at 100% of the principal amount plus unpaid interest, if any, accrued to, but excluding, the redemption date, upon at least 30 days’ but not more than 60 days’ prior written notice to holders of the 2026 Debentures.

The holders of the 2026 Debentures have the right to require the Operating Partnership to repurchase the 2026 Debentures in cash in whole or in part on each of August 15, 2011, August 15, 2016 and August 15, 2021, and in the event of a designated event, for a repurchase price equal to 100% of the principal amount of the 2026 Debentures plus unpaid interest, if any, accrued to, but excluding, the repurchase date. Designated events include certain merger or combination transactions, non-affiliates becoming the beneficial owner of more than 50% of the total voting power of Digital Realty Trust, Inc.’s capital stock, a substantial turnover of Digital Realty Trust, Inc.’s directors within a 12- month period and Digital Realty Trust, Inc. ceasing to be the general partner of the Operating Partnership. Certain events are considered “Events of Default,” which may result in the accelerated maturity of the 2026 Debentures, including a default for 30 days in payment of any installment of interest under the 2026 Debentures, a default in the payment of the principal amount or any repurchase price or redemption price due with respect to the 2026 Debentures and the Operating Partnership’s failure to deliver cash or any shares of Digital Realty Trust, Inc. common stock within 15 days after the due date upon an exchange of the 2026 Debentures, together with any cash due in lieu of fractional shares of common stock.

In addition, the 2026 Debentures are exchangeable (i) prior to July 15, 2026, during any fiscal quarter after the fiscal quarter ended September 30, 2006, if the closing sale price of Digital Realty Trust, Inc. common stock for 20 or more trading days in a period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter exceeds 130% of the exchange price in effect on the last trading day of the immediately preceding fiscal quarter, (ii) prior to July 15, 2026, during the five business day period after any five consecutive trading day period in which the average trading price per $1,000 principal amount of 2026 Debentures was equal to or less than 98% of the product of the closing sale price of the common stock during such period, multiplied by the applicable exchange rate, (iii) if we call the 2026 Debentures for redemption and (iv) any time on or after July 15, 2026. In April 2011, we gave notice to the holders of the 2026 Debentures that the 2026 Debentures shall be exchangeable during the calendar quarter ending June 30, 2011 pursuant to (i) above. The exchange price in effect as of June 30, 2011 was $30.99 per share.

We entered into a registration rights agreement whereby we agreed to register the shares of common stock which could be issued in the future upon exchange of the 2026 Debentures. If we do not fulfill certain of our obligations under the registration rights agreement, we will be required to pay liquidated damages to the holders of the 2026 Debentures. No separate contingent obligation has been recorded as no liquidated damages have become probable. We filed the shelf registration statement with the U.S. Securities and Exchange Commission in April 2007, which was automatically effective upon filing.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

During the six months ended June 30, 2011, we exchanged approximately $40.5 million aggregate principal amount of our 2026 Debentures for a combination of cash (approximately $52.2 million) and 372,068 restricted shares of Digital Realty Trust, Inc. common stock at the request of holders pursuant to the terms of the indenture governing our 2026 Debentures. As of June 30, 2011, the remaining approximately $48.3 million face amount of the 2026 Debentures remains outstanding under the original terms. We recorded a loss on exchange of approximately $0.1 million and $1.5 million for the three months ended June 30, 2011 and 2010, respectively, and approximately $0.7 million and $1.5 million for the six months ended June 30, 2011 and 2010, respectively, determined based on the excess of the fair value of the 2026 Debentures at the exchange date over the carrying value of the exchanged 2026 Debentures along with a write off of a pro rata portion of the associated debt discount on the 2026 Debentures and deferred financing costs. This loss is reported as a loss on early extinguishment of debt in the condensed consolidated income statements.

The following table provides additional information about the 2026 Debentures as of the date presented pursuant to requirements under U.S. GAAP for convertible debt instruments that require the principal amount to be settled in cash upon conversion:

	4.125% Exchangeable Senior Debentures due 2026
($ and shares in thousands, except exchange price)	June 30, 2011			December 31, 2010
Carrying amount of the equity component	$	5,119		$	9,406
Principal amount of the liability component	$	48,301		$	88,758
Unamortized discount of the liability component	$	113		$	1,456
Net carrying amount of the liability component	$	48,188		$	87,302
Remaining amortization period of discount		1 month			7 months
Exchange price	$	30.99		$	31.42
Number of shares to be issued upon exchange (a)		777			1,103
The amount by which the if-exchanged value exceeds the principal amount (a)	$	48,003		$	56,828
Effective interest rate on liability component		6.75	%		6.75	%
Non-cash interest cost recognized for the period ended	$	1,117		$	2,067	(b)
Coupon rate interest cost recognized for the period ended	$	1,376		$	3,490	(b)

(a) In accordance with accounting guidance on convertible debt instruments that require the principal amount to be settled in cash upon conversion, we are required to disclose the exchange price and the number of shares on which the aggregate consideration to be delivered upon exchange is determined (principal plus excess value). The 2026 Debentures require the entire principal amount to be settled in cash, and at our option, any excess value above the principal amount may be settled in cash and/or common shares. Based on the June 30, 2011 and December 31, 2010 closing share prices of Digital Realty Trust, Inc. common stock and the exchange prices in the table above, the excess value was approximately $48.0 million and $56.8 million, respectively; accordingly, approximately 0.8 million and 1.1 million common shares, respectively, would be issued if the 2026 Debentures were settled on these dates and we elected to settle the excess value in shares of Digital Realty Trust, Inc. common stock.

(b) Amounts are for the six months ended June 30, 2010.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

5.50% Exchangeable Senior Debentures due 2029

On April 20, 2009, the Operating Partnership issued $266.4 million of its 5.50% exchangeable senior debentures due April 15, 2029 (the 2029 Debentures). Costs incurred to issue the 2029 Debentures were approximately $7.8 million. These costs are being amortized over a period of five years, which represents the estimated term of the 2029 Debentures, and are included in deferred financing costs, net in the condensed consolidated balance sheet. The 2029 Debentures are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc.

Interest is payable on October 15 and April 15 of each year beginning October 15, 2009 until the maturity date of April 15, 2029. The 2029 Debentures bear interest at 5.50% per annum and may be exchanged for shares of Digital Realty Trust, Inc. common stock at an exchange rate that was initially 23.2558 shares per $1,000 principal amount of 2029 Debentures. The exchange rate on the 2029 Debentures is subject to adjustment for certain events, including, but not limited to, certain dividends on Digital Realty Trust, Inc. common stock in excess of $0.33 per share per quarter (the “reference dividend”). Effective June 13, 2011, the exchange rate has been adjusted to 23.9050 shares per $1,000 principal amount of 2029 Debentures as a result of the aggregate dividends in excess of the reference dividend that Digital Realty Trust, Inc. declared and paid on its common stock beginning with the quarter ended June 30, 2009 and through the quarter ended June 30, 2011. Due to the fact that the exchange feature for the 2029 Debentures must be settled in the common stock of Digital Realty Trust, Inc., new accounting guidance on convertible debt instruments that requires the principal amount to be settled in cash upon conversion does not apply.

Prior to April 18, 2014, the Operating Partnership may not redeem the 2029 Debentures except to preserve Digital Realty Trust, Inc.’s status as a REIT for U.S. federal income tax purposes. On or after April 18, 2014, at the Operating Partnership’s option, the 2029 Debentures are redeemable in cash in whole or in part at 100% of the principal amount plus unpaid interest, if any, accrued to, but excluding, the redemption date, upon at least 30 days’ but not more than 60 days’ prior written notice to holders of the 2029 Debentures.

The holders of the 2029 Debentures have the right to require the Operating Partnership to repurchase the 2029 Debentures in cash in whole or in part on each of April 15, 2014, April 15, 2019 and April 15, 2024, and in the event of a designated event, for a repurchase price equal to 100% of the principal amount of the 2029 Debentures plus unpaid interest, if any, accrued to, but excluding, the repurchase date. Designated events include certain merger or combination transactions, non-affiliates becoming the beneficial owner of more than 50% of the total voting power of Digital Realty Trust, Inc.’s capital stock, a substantial turnover of Digital Realty Trust, Inc.’s directors within a 12-month period without the approval of existing members and Digital Realty Trust, Inc. ceasing to be the general partner of the Operating Partnership. Certain events are considered “Events of Default,” which may result in the accelerated maturity of the 2029 Debentures, including a default for 30 days in payment of any installment of interest under the 2029 Debentures, a default in the payment of the principal amount or any repurchase price or redemption price due with respect to the 2029 Debentures and the Operating Partnership’s failure to deliver shares of Digital Realty Trust, Inc. common stock within 15 days after the due date upon an exchange of the 2029 Debentures, together with any cash due in lieu of fractional shares of common stock.

We entered into a registration rights agreement whereby we must register the shares of common stock which could be issued in the future upon exchange of the 2029 Debentures. If we do not fulfill certain of our obligations under the registration rights agreement, we will be required to pay liquidated damages to the holders of the 2029 Debentures. No separate contingent obligation has been recorded as no liquidated damages have become probable. We filed the shelf registration statement with the U.S. Securities and Exchange Commission in December 2009, which was automatically effective upon filing.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

The table below summarizes our debt maturities and principal payments as of June 30, 2011 (in thousands):

	Revolving Credit Facility (1)		Unsecured Senior Notes		Senior Notes			Exchangeable Senior Debentures			Mortgage Loans (2)		Other Secured Loan		Total Debt
Remainder of 2011	$	341,417	$	25,000	$	—		$	48,301	(3)	$	7,607	$	—	$	422,325
2012		—		—		—			—			164,743		—		164,743
2013		—		33,000		—			—			160,583		10,500		204,083
2014		—		—		—			266,400	(4)		220,996		—		487,396
2015		—		67,000		375,000			—			75,436		—		517,436
Thereafter		—		75,000		900,000			—			305,098		—		1,280,098
Subtotal	$	341,417	$	200,000	$	1,275,000		$	314,701		$	934,463	$	10,500	$	3,076,081
Unamortized discount		—		—		(9,413	)		(113	)		—		—		(9,526	)
Unamortized premium		—		—		—			—			1,022		—		1,022
Total	$	341,417	$	200,000	$	1,265,587		$	314,588		$	935,485	$	10,500	$	3,067,577

⁽¹⁾ Subject to a one-year extension option exercisable by us. The bank group is obligated to grant the extension option provided we give proper notice, we make certain representations and warranties and no default exists under the revolving credit facility.

⁽²⁾ Our mortgage loans are generally non-recourse to us, subject to carve outs for specified actions by us or specified undisclosed environmental liabilities. As of June 30, 2011, we had provided limited recourse guarantees with respect to approximately $60.1 million principal amount of the outstanding mortgage indebtedness, and partial letter of credit support with respect to approximately an additional $47.3 million of the outstanding mortgage indebtedness.

⁽³⁾ Assumes maturity of the 2026 Debentures at first redemption date in August 2011.

⁽⁴⁾ Assumes maturity of the 2029 Debentures at first redemption date in April 2014.

7. Income per Share

The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Net income available to common stockholders	$	31,990	$	9,091	$	62,970	$	23,835
Weighted average shares outstanding—basic		96,295,585		80,542,329		93,875,415		79,164,167
Potentially dilutive common shares:
Stock options		203,078		225,931		193,985		206,803
Class C Units (2007 Grant)		73,855		154,229		67,856		142,747
Unvested incentive units		180,377		179,267		152,927		155,504
Excess exchange value of the 2026 Debentures		758,916		1,920,061		722,782		1,781,415
Weighted average shares outstanding—diluted		97,511,811		83,021,817		95,012,965		81,450,636
Income per share:
Basic	$	0.33	$	0.11	$	0.67	$	0.30
Diluted	$	0.33	$	0.11	$	0.66	$	0.29

On or after July 15, 2026, the 2026 Debentures may be exchanged at the then-applicable exchange rate for cash (up to the principal amount of the 2026 Debentures) and, with respect to any excess exchange value, into cash, shares of Digital Realty Trust, Inc. common stock or a combination of cash and shares of Digital Realty Trust, Inc. common stock. The 2026 Debentures are also

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DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

exchangeable prior to July 15, 2026, but only upon the occurrence of certain specified events. During the three and six months ended June 30, 2011, the weighted average common stock price exceeded the strike price as of June 30, 2011 of $30.99. Therefore, using the treasury method, 758,916 and 722,782 shares of common stock contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common shares in determining diluted earnings per share for the three and six months ended June 30, 2011, respectively. During the three and six months ended June 30, 2010, the weighted average common stock price exceeded the strike price as of June 30, 2010 of $31.84. Therefore, using the treasury method, 1,920,061 and 1,781,415 shares of common stock contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common shares in determining diluted earnings per share for the three and six months ended June 30, 2010, respectively.

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Weighted average of Operating Partnership common units not owned by us		4,760,802		4,964,417		4,823,553		4,874,406
Potentially dilutive outstanding stock options		—		—		—		5,346
Potentially dilutive 2029 Debentures		6,289,434		6,195,345		6,279,766		6,195,345
Potentially dilutive Series C Cumulative Convertible Preferred Stock		2,864,660		3,657,477		3,256,316		3,657,477
Potentially dilutive Series D Cumulative Convertible Preferred Stock		6,418,585		8,237,540		7,370,713		8,226,381
		20,333,481		23,054,779		21,730,348		22,958,955

8. Income per Unit

The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts):

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Net income available to common unitholders	$	33,572	$	9,651	$	66,204	$	25,368
Weighted average units outstanding—basic		101,056,387		86,149,647		98,698,968		84,699,431
Potentially dilutive common units:
Stock options		203,078		225,931		193,985		206,803
Class C Units (2007 Grant)		73,855		154,229		67,856		142,747
Unvested incentive units		180,377		179,267		152,927		155,504
Excess exchange value of the 2026 Debentures		758,916		1,920,061		722,782		1,781,415
Weighted average units outstanding—diluted		102,272,613		88,629,135		99,836,518		86,985,900
Income per unit:
Basic	$	0.33	$	0.11	$	0.67	$	0.30
Diluted	$	0.33	$	0.11	$	0.66	$	0.29

On or after July 15, 2026, the 2026 Debentures may be exchanged at the then-applicable exchange rate for cash (up to the principal amount of the 2026 Debentures) and, with respect to any excess exchange value, into cash, shares of Digital Realty Trust, Inc. common stock or a combination of cash and shares of Digital Realty Trust, Inc. common stock. Pursuant to the terms of the

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

Operating Partnership’s agreement of limited partnership, the Operating Partnership will deliver to Digital Realty Trust, Inc. one common unit for each share of common stock issuable upon exchange of the 2026 Debentures. The 2026 Debentures are also exchangeable prior to July 15, 2026, but only upon the occurrence of certain specified events. During the three and six months ended June 30, 2011, the weighted average common stock price exceeded the strike price as of June 30, 2011 of $30.99. Therefore, using the treasury method, 758,916 and 722,782 common units contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common units in determining diluted earnings per unit for the three and six months ended June 30, 2011, respectively. During the three and six months ended June 30, 2010, the weighted average common stock price exceeded the strike price as of June 30, 2010 of $31.84. Therefore, using the treasury method, 1,920,061 and 1,781,415 common units contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common units in determining diluted earnings per unit for the three and six months ended June 30, 2010, respectively.

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Potentially dilutive outstanding stock options		—		—		—		5,346
Potentially dilutive 2029 Debentures		6,289,434		6,195,345		6,279,766		6,195,345
Potentially dilutive Series C Cumulative Convertible Preferred Units		2,864,660		3,657,477		3,256,316		3,657,477
Potentially dilutive Series D Cumulative Convertible Preferred Units		6,418,585		8,237,540		7,370,713		8,226,381
		15,572,679		18,090,362		16,906,795		18,084,549

9. Income Taxes

Digital Realty Trust, Inc. (the Parent Company) elected to be taxed as a REIT and believes that it has complied with the REIT requirements of the Code. As a REIT, the Parent Company is generally not subject to corporate level federal income taxes on taxable income to the extent it is currently distributed to its stockholders. Since inception, the Parent Company has distributed 100% of its taxable income and intends to do so for the tax year ending December 31, 2011. As such, no provision for federal income taxes has been included in the accompanying condensed consolidated financial statements for the three and six months ended June 30, 2011 and 2010.

We have elected taxable REIT subsidiary (TRS) status for some of our consolidated subsidiaries. In general, a TRS may provide services that would otherwise be considered impermissible for REITs and hold assets that REITs cannot hold directly. A TRS is subject to federal income tax as a regular C corporation. Income taxes for TRS entities are accrued, as necessary, for the three and six months ended June 30, 2011 and 2010.

For our TRS entities and foreign subsidiaries that are subject to U.S. federal, state and foreign income taxes, deferred tax assets and liabilities are established for temporary differences between the financial reporting basis and the tax basis of assets and liabilities at the enacted tax rates expected to be in effect when the temporary differences reverse. A valuation allowance for deferred tax assets is provided if we believe it is more likely than not that the deferred tax asset may not be realized, based on available evidence at the time the determination is made. An increase or decrease in the valuation allowance that results from the change in circumstances that causes a change in our judgment about the realizability of the related deferred tax asset is included in income. Deferred tax assets (net of valuation allowance) and liabilities for our TRS entities and foreign subsidiaries are accrued, as necessary, for the three and six months ended June 30, 2011 and 2010.

10. Equity and Accumulated Other Comprehensive Loss, Net

(a) Equity Distribution Agreements

On December 31, 2009, Digital Realty Trust, Inc. entered into equity distribution agreements, which we refer to as the Original Equity Distribution Agreements, with each of Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated and Credit Suisse Securities (USA) LLC, or the Original Agents, under which it could issue and sell shares of its common stock having an

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

aggregate offering price of up to $400.0 million from time to time through, at its discretion, any of the Original Agents as its sales agents. On January 22, 2010, Digital Realty Trust, Inc. amended and restated each Original Equity Distribution Agreement with the applicable Original Agent, and also entered into a new equity distribution agreement with Morgan Stanley & Co. Incorporated, or collectively the Equity Distribution Agreements, under which it may issue and sell shares of its common stock having an aggregate offering price of up to $400.0 million (including the approximately 1.1 million shares of common stock having an aggregate offering price of approximately $54.3 million sold pursuant to the Original Equity Distribution Agreements as of January 22, 2010), from time to time through, at its discretion, any of the Original Agents or Morgan Stanley & Co. Incorporated as its sales agents. On March 2, 2011, the Equity Distribution Agreements were amended to amend certain representations. The sales of common stock made under the Equity Distribution Agreements will be made in “at the market” offerings as defined in Rule 415 of the Securities Act. For the six months ended June 30, 2011, Digital Realty Trust, Inc. generated net proceeds of approximately $176.9 million from the issuance of approximately 3.0 million common shares under the Equity Distribution Agreements at an average price of $60.51 per share after payment of approximately $2.7 million of commissions to the sales agents and before offering expenses. In June 2011, we completed the equity distribution program. Pursuant to the program, we sold 6.8 million shares of common stock for gross proceeds of $400.0 million, resulting in net proceeds of approximately $394.0 million after deducting commissions.

On June 29, 2011, Digital Realty Trust, Inc. entered into equity distribution agreements with each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Credit Suisse Securities (USA) LLC, Deutsche Bank Securities Inc. and Morgan Stanley & Co. LLC, or the Agents, under which it could issue and sell shares of its common stock having an aggregate offering price of up to $400.0 million from time to time through, at its discretion, any of the Agents as its sales agents. The sales of common stock made under the equity distribution agreements will be made in “at the market” offerings as defined in Rule 415 of the Securities Act.

(b) Noncontrolling Interests in Operating Partnership

Noncontrolling interests in the Operating Partnership relate to the interests that are not owned by Digital Realty Trust, Inc. The following table shows the ownership interest in the Operating Partnership as of June 30, 2011 and December 31, 2010:

	June 30, 2011					December 31, 2010
	Number of units		Percentage of total			Number of units		Percentage of total
Digital Realty Trust, Inc.		98,754,727		95.1	%		91,159,221		94.3	%
Noncontrolling interests consist of:
Common units held by third parties		3,430,814		3.3			3,937,827		4.1
Incentive units held by employees and directors (see note 12)		1,604,032		1.6			1,525,622		1.6
		103,789,573		100.0	%		96,622,670		100.0	%

Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of Digital Realty Trust, Inc. common stock at the time of redemption. Alternatively, Digital Realty Trust, Inc. may elect to acquire those common units in exchange for shares of Digital Realty Trust, Inc. common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, Digital Realty Trust, Inc. evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the noncontrolling Operating Partnership common and incentive units. Based on the results of this analysis, we concluded that the common and incentive Operating Partnership units met the criteria to be classified within equity.

The redemption value of the noncontrolling Operating Partnership common units and the vested incentive units was approximately $272.0 million and $244.5 million based on the closing market price of Digital Realty Trust, Inc. common stock on June 30, 2011 and December 31, 2010, respectively.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

The following table shows activity for the noncontrolling interests in the Operating Partnership for the six months ended June 30, 2011:

	Common Units			Incentive Units			Total
As of December 31, 2010		3,937,827			1,525,622			5,463,449
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1)		(507,013	)		—			(507,013	)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1)		—			(51,957	)		(51,957	)
Cancellation of incentive units held by employees and directors		—			(53,138	)		(53,138	)
Grant of incentive units to employees and directors		—			183,505			183,505
As of June 30, 2011		3,430,814			1,604,032			5,034,846

(1) This redemption was recorded as a reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital based on the book value per unit in the accompanying condensed consolidated balance sheet of Digital Realty Trust, Inc.

Under the terms of certain third parties’ (the eXchange parties) contribution agreements signed in the third quarter of 2004, we have agreed to indemnify each eXchange party against adverse tax consequences in the event the Operating Partnership directly or indirectly sells, exchanges or otherwise disposes of (whether by way of merger, sale of assets or otherwise) in a taxable transaction any interest in 200 Paul Avenue 1-4 or 1100 Space Park Drive until the earlier of November 3, 2013 and the date on which these contributors or certain transferees hold less than 25% of the Operating Partnership common units issued to them in the formation transactions consummated concurrently with the IPO. Under the eXchange parties’ amended contribution agreement, the Operating Partnership has agreed to make approximately $17.8 million of indebtedness available for guaranty by the eXchange parties until the earlier of November 3, 2013 and the date on which these contributors or certain transferees hold less than 25% of the Operating Partnership common units issued to them in the formation transactions consummated concurrently with the IPO, and we have agreed to indemnify each eXchange party against adverse tax consequences if the Operating Partnership does not provide such indebtedness to guarantee.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

(c) Dividends

We have declared the following dividends on our common and preferred stock for the six months ended June 30, 2011 (in thousands):

Date dividend declared	Dividend payable date		Series C Preferred Stock (1)		Series D Preferred Stock (2)		Common Stock  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	62,459
April 25, 2011		June 30, 2011	$	1,441	$	3,272	$	67,031
			$	3,273	$	7,962	$	129,490

(1) $1.094 annual rate of dividend per share.

(2) $1.375 annual rate of dividend per share.

(3) $2.720 annual rate of dividend per share.

Distributions out of Digital Realty Trust, Inc.’s current or accumulated earnings and profits are generally classified as dividends whereas distributions in excess of its current and accumulated earnings and profits, to the extent of a stockholder’s U.S. federal income tax basis in Digital Realty Trust, Inc.’s stock, are generally classified as a return of capital. Distributions in excess of a stockholder’s U.S. federal income tax basis in Digital Realty Trust, Inc.’s stock are generally characterized as capital gain. Cash provided by operating activities has been sufficient to fund all distributions.

(d) Accumulated Other Comprehensive Loss, Net

The accumulated balances for each classification of other comprehensive loss, net as of June 30, 2011 are as follows (in thousands):

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss, net
Balance as of December 31, 2010	$	(33,175	)	$	(8,906	)	$	(42,081	)
Net current period change		23,800			(907	)		22,893
Reclassification to interest expense from interest rate swaps		—			3,019			3,019
Balance as of June 30, 2011	$	(9,375	)	$	(6,794	)	$	(16,169	)

(e) Noncontrolling Interests in Consolidated Joint Ventures

On June 24, 2011, we acquired all of the noncontrolling ownership interest in the entity that owns Datacenter Park Dallas from our joint venture partner for approximately $53.2 million (subject to adjustment in limited circumstances). The acquisition was financed with borrowings under our revolving credit facility. The amount paid in excess of the carrying value of the noncontrolling ownership interest resulted in a decrease to additional paid-in capital, as presented in the accompanying condensed consolidated statement of equity.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

11. Capital and Comprehensive Income

(a) Allocations of Net Income and Net Losses to Partners

Except for special allocations to holders of profits interest units described below in note 12(a) under the heading “Incentive Plans-Long-Term Incentive Units,” the Operating Partnership’s net income will generally be allocated to Digital Realty Trust, Inc. (the General Partner) to the extent of the accrued preferred return on its preferred units, and then to the General Partner and the Operating Partnership’s limited partners in accordance with the respective percentage interests in the common units issued by the Operating Partnership. Net loss will generally be allocated to the General Partner and the Operating Partnership’s limited partners in accordance with the respective common percentage interests in the Operating Partnership until the limited partner’s capital is reduced to zero and any remaining net loss would be allocated to the General Partner. However, in some cases, losses may be disproportionately allocated to partners who have guaranteed our debt. The allocations described above are subject to special allocations relating to depreciation deductions and to compliance with the provisions of Sections 704(b) and 704(c) of the Code, and the associated Treasury Regulations.

(b) Partnership Units

Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of the General Partner’s common stock at the time of redemption. Alternatively, the General Partner may elect to acquire those common units in exchange for shares of the General Partner’s common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, the Operating Partnership evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the limited partners’ common units and the vested incentive units. Based on the results of this analysis, the Operating Partnership concluded that the common and vested incentive Operating Partnership units met the criteria to be classified within capital.

The redemption value of the limited partners’ common units and the vested incentive units was approximately $272.0 million and $244.5 million based on the closing market price of Digital Realty Trust, Inc.’s common stock on June 30, 2011 and December 31, 2010, respectively.

(c) Distributions

All distributions on our units are at the discretion of Digital Realty Trust, Inc.’s board of directors. As of June 30, 2011, the Operating Partnership declared the following distributions (in thousands):

Date distribution declared	Distribution payable date		Series C Preferred Units (1)		Series D Preferred Units (2)		Common Units  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	66,252
April 25, 2011		June 30, 2011	$	1,441	$	3,272	$	70,577
			$	3,273	$	7,962	$	136,829

(1) $1.094 annual rate of distribution per unit.

(2) $1.375 annual rate of distribution per unit.

(3) $2.720 annual rate of distribution per unit.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

(d) Accumulated Other Comprehensive Loss

The accumulated balances for each classification of other comprehensive loss as of June 30, 2011 are as follows (in thousands):

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance as of December 31, 2010	$	(36,051	)	$	(9,809	)	$	(45,860	)
Net current period change		25,037			(947	)		24,090
Reclassification to interest expense from interest rate swaps		—			3,174			3,174
Balance as of June 30, 2011	$	(11,014	)	$	(7,582	)	$	(18,596	)

(e) Noncontrolling Interests in Consolidated Joint Ventures

On June 24, 2011, we acquired all of the noncontrolling ownership interest in the entity that owns Datacenter Park Dallas from our joint venture partner for approximately $53.2 million (subject to adjustment in limited circumstances). The acquisition was financed with borrowings under our revolving credit facility. The amount paid in excess of the carrying value of the noncontrolling ownership interest resulted in a decrease to general partner common capital as presented in the accompanying condensed consolidated statement of capital.

12. Incentive Plan

Our 2004 Incentive Award Plan provides for the grant of incentive awards to employees, directors and consultants. Awards issuable under the 2004 Incentive Award Plan include stock options, restricted stock, dividend equivalents, stock appreciation rights, long-term incentive units, cash performance bonuses and other incentive awards. Only employees are eligible to receive incentive stock options under the 2004 Incentive Award Plan. Initially, we had reserved a total of 4,474,102 shares of common stock for issuance pursuant to the 2004 Incentive Award Plan, subject to certain adjustments set forth in the 2004 Incentive Award Plan. On May 2, 2007, Digital Realty Trust, Inc.’s stockholders approved the First Amended and Restated Digital Realty Trust, Inc., Digital Realty Services, Inc. and Digital Realty Trust, L.P. 2004 Incentive Award Plan (as amended, the Amended and Restated 2004 Incentive Award Plan). The Amended and Restated 2004 Incentive Award Plan increases the aggregate number of shares of stock which may be issued or transferred under the plan by 5,000,000 shares to a total of 9,474,102 shares, and provides that the maximum number of shares of stock with respect to awards granted to any one participant during a calendar year will be 1,500,000 and the maximum amount that may be paid in cash during any calendar year with respect to any performance-based award not denominated in stock or otherwise for which the foregoing limitation would not be an effective limitation for purposes of Section 162(m) of the Code will be $10.0 million.

As of June 30, 2011, 3,739,090 shares of common stock or awards convertible into or exchangeable for common stock remained available for future issuance under the Amended and Restated 2004 Incentive Award Plan. Each long-term incentive and Class C unit issued under the Amended and Restated 2004 Incentive Award Plan will count as one share of common stock for purposes of calculating the limit on shares that may be issued under the Amended and Restated 2004 Incentive Award Plan and the individual award limit discussed above.

(a) Long-Term Incentive Units

Long-term incentive units, which are also referred to as profits interest units, may be issued to eligible participants for the performance of services to or for the benefit of the Operating Partnership. Long-term incentive units, whether vested or not, will receive the same quarterly per unit distributions as Operating Partnership common units, which equal per share distributions on Digital Realty Trust, Inc. common stock. Initially, long-term incentive units do not have full parity with common units with respect to liquidating distributions. If such parity is reached, vested long-term incentive units may be converted into an equal number of common units of the Operating Partnership at any time, and thereafter enjoy all the rights of common units of the Operating Partnership, including redemption rights.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

In order to achieve full parity with common units, long-term incentive units must be fully vested and the holder’s capital account balance in respect of such long-term incentive units must be equal to the capital account balance of a holder of an equivalent number of common units. The capital account balance attributable to each common unit is generally expected to be the same, in part because of the amount credited to a partner’s capital account upon the partner’s contribution of property to the Operating Partnership, and in part because the partnership agreement provides, in most cases, that allocations of income, gain, loss and deduction (which will adjust the partner’s capital accounts) are to be made to the common units on a proportionate basis. As a result, with respect to a number of long-term incentive units, it is possible to determine the capital account balance of an equivalent number of common units by multiplying the number of long-term incentive units by the capital account balance with respect to a common unit.

A partner’s initial capital account balance is equal to the amount the partner paid (or contributed to the Operating Partnership) for the partner’s units and is subject to subsequent adjustments, including with respect to the partner’s share of income, gain or loss of the Operating Partnership. Because a holder of long-term incentive units generally will not pay for the long-term incentive units, the initial capital account balance attributable to such long-term incentive units will be zero. However, the Operating Partnership is required to allocate income, gain, loss and deduction to the partner’s capital accounts in accordance with the terms of the partnership agreement, subject to applicable Treasury Regulations. The partnership agreement provides that holders of long-term incentive units will receive special allocations of gain in the event of a sale or “hypothetical sale” of assets of the Operating Partnership prior to the allocation of gain to Digital Realty Trust, Inc. or other limited partners with respect to their common units. The amount of such allocation will, to the extent of any such gain, be equal to the difference between the capital account balance of a holder of long-term incentive units attributable to such units and the capital account balance attributable to an equivalent number of common units. If and when such gain allocation is fully made, a holder of long-term incentive units will have achieved full parity with holders of common units. To the extent that, upon an actual sale or a “hypothetical sale” of the Operating Partnership’s assets as described above, there is not sufficient gain to allocate to a holder’s capital account with respect to long-term incentive units, or if such sale or “hypothetical sale” does not occur, such units will not achieve parity with common units.

The term “hypothetical sale” refers to circumstances that are not actual sales of the Operating Partnership’s assets but that require certain adjustments to the value of the Operating Partnership’s assets and the partners’ capital account balances. Specifically, the partnership agreement provides that, from time to time, in accordance with applicable Treasury Regulations, the Operating Partnership will adjust the value of its assets to equal their respective fair market values, and adjust the partners’ capital accounts, in accordance with the terms of the partnership agreement, as if the Operating Partnership sold its assets for an amount equal to their value. Times for making such adjustments generally include the liquidation of the Operating Partnership, the acquisition of an additional interest in the Operating Partnership by a new or existing partner in exchange for more than a de minimis capital contribution, the distribution by the Operating Partnership to a partner of more than a de minimis amount of partnership property as consideration for an interest in the Operating Partnership, in connection with the grant of an interest in the Operating Partnership (other than a de minimis interest) as consideration for the performance of services to or for the benefit of the Operating Partnership (including the grant of a long-term incentive unit), and at such other times as may be desirable or required to comply with the Treasury Regulations.

During the six months ended June 30, 2011 and 2010, certain employees were granted an aggregate of 84,873 and 92,368 long-term incentive units, respectively. The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock, are being expensed on a straight-line basis over the vesting period of the long-term incentive units, which is four years. During the six months ended June 30, 2011 and 2010, certain employees were also granted an aggregate of 98,632 and 107,993 long-term incentive units, respectively, which, in addition to a service condition, are subject to a performance condition that impacts the number of units in which the employee ultimately vests. The performance condition is based upon our achievement of the respective fiscal years’ Funds From Operations per share targets. Upon evaluating the results of the performance condition, the final number of units is determined and such units vest based on satisfaction of the service conditions. The service conditions of the awards provide for 20% vesting on each of the first and second anniversaries of the grant date and 30% vesting on each of the third and fourth anniversaries of the grant date, provided the grantee continues employment on each anniversary date. Based on our 2010 FFO per diluted share and unit, all of the 2010 long-term incentive units satisfied the performance condition. The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock, are being expensed on a straight-line basis over the vesting period of the long-term incentive units, which ranges from four to five years.

The expense recorded for the three months ended June 30, 2011 and 2010 related to long-term incentive units was approximately $2.5 million and $2.2 million, respectively, and approximately $4.4 million and $3.4 million for the six months ended June 30, 2011 and 2010, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.2 million and $0.2 million for the three months ended June 30, 2011 and 2010,

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

respectively, and approximately $0.4 million and $0.5 million for the six months ended June 30, 2011 and 2010, respectively. Unearned compensation representing the unvested portion of the long-term incentive units totaled $18.2 million and $12.9 million as of June 30, 2011 and December 31, 2010, respectively. We expect to recognize this unearned compensation over the next 2.8 years on a weighted average basis.

(b) Class C Profits Interest Units

On May 2, 2007, we granted awards of Class C Profits Interest Units of the Operating Partnership or similar stock-based performance awards, which we refer to collectively as the Class C Units, under the Amended and Restated 2004 Incentive Award Plan (2007 Grant) to each of our named executive officers and certain other officers and employees.

The Class C Units subject to this award were subject to vesting based on the achievement of a total stockholder return (which we refer to as the market condition) as measured on November 1, 2008 (which we refer to as the first measurement date) and May 1, 2010 (which we refer to as the second measurement date). If:

• with respect to the first measurement date, we achieved a total shareholder return equal to at least 18% over the period commencing on May 2, 2007 and ending on November 1, 2008; and

• with respect to the second measurement date, we achieved a total shareholder return equal to at least 36% over a period commencing on May 2, 2007 and ending on the earlier of May 1, 2010 and the date of a change in control of our company,

the aggregate amount of the 2007 Grant award was equal to 8% of the excess shareholder value, as defined, created during the applicable performance period, but in no event in excess of:

• $17 million for the first measurement date; or

• $40 million (less the amount of the award pool as of the first measurement date) for the second measurement date.

We previously determined that the market condition with respect to the first measurement date was not achieved. On May 1, 2010, we determined that 613,485 of the Class C Units subject to the 2007 Grant satisfied the market condition on the second measurement date (May 1, 2010), with the value of these units equal to the maximum amount of the award pool payable pursuant to the 2007 Grant on the second measurement date. Of the Class C Units that satisfied the market condition on May 1, 2010, 60% vested on May 1, 2010 and the remaining 40% will vest ratably each month thereafter for 24 months.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

The fair value of the 2007 Grant was measured on the grant date using a Monte Carlo simulation to estimate the probability of the multiple market conditions being satisfied. The Monte Carlo simulation uses a statistical formula underlying the Black-Scholes and binomial formulas, and such simulation was run approximately 100,000 times. For each simulation, the value of the payoff was calculated at the settlement date and was then discounted to the grant date at a risk-free interest rate. The expected value of the Class C units on the grant date was determined by multiplying the average of the values over all simulations by the number of outstanding shares of Digital Realty Trust, Inc. common stock and Operating Partnership units. The valuation was performed in a risk-neutral framework, so no assumption was made with respect to an equity risk premium. Other significant assumptions used in the valuation included an expected term of 36 months, expected stock price volatility of 23%, a risk-free interest rate of 4.6%, and a dividend growth rate of 5.0 percent. The fixed award limit under the plan is $17 million for the first market condition and $40 million for the second market condition, and there were 69.2 million shares of Digital Realty Trust, Inc. common stock and Operating Partnership units outstanding as of the 2007 grant date. The grant date fair value of these awards of approximately $11.8 million will be recognized as compensation expense on a straight-line basis over the expected service period of five years. The unearned compensation as of June 30, 2011 and December 31, 2010 was $1.9 million and $2.9 million, respectively. As of June 30, 2011 and December 31, 2010, 497,023 and 439,653, respectively, of the Class C Units subject to the 2007 Grant had vested. We recognized compensation expense related to the Class C Units subject to the 2007 Grant of approximately $0.5 million and $0.5 million for the three months ended June 30, 2011 and 2010, respectively, and approximately $1.1 million and $0.9 million for the six months ended June 30, 2011 and 2010, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.1 million for the three months ended June 30, 2011 and 2010 and approximately $0.1 million for the six months ended June 30, 2011 and 2010, respectively.

(c) Stock Options

The fair value of each option granted under the Amended and Restated 2004 Incentive Award Plan is estimated on the date of the grant using the Black-Scholes option-pricing model. For the three and six months ended June 30, 2011 and 2010, no stock options were granted. The fair values are being expensed on a straight-line basis over the vesting period of the options, which ranges from four to five years. The expense recorded for the three months ended June 30, 2011 and 2010, respectively, was approximately $0.2 million and approximately $0.4 million and $0.5 million for the six months ended June 30, 2011 and 2010, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.1 million for the three months ended June 30, 2011 and 2010 and approximately $0.1 million for the six months ended June 30, 2011 and 2010. Unearned compensation representing the unvested portion of the stock options totaled $0.8 million and $1.3 million as of June 30, 2011 and December 31, 2010, respectively. We expect to recognize this unearned compensation over the next 0.7 years on a weighted average basis.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

The following table summarizes the Amended and Restated 2004 Incentive Award Plan’s stock option activity for the six months ended June 30, 2011:

	Period ended June 30, 2011
	Shares			Weighted average exercise price
Options outstanding, beginning of period		470,264		$	28.35
Exercised		(80,303	)		38.02
Cancelled / Forfeited		(8,727	)		41.73
Options outstanding, end of period		381,234		$	26.01
Exercisable, end of period		317,007		$	22.90

The following table summarizes information about stock options outstanding and exercisable as of June 30, 2011:

Options outstanding									Options exercisable
Exercise price	Number outstanding		Weighted average remaining contractual life (years)		Weighted average exercise price		Aggregate intrinsic value		Number exercisable		Weighted average remaining contractual life (years)		Weighted average exercise price		Aggregate intrinsic value
$12.00-13.02		182,369		3.33	$	12.01	$	9,077,054		182,369		3.33	$	12.01	$	9,077,054
$20.37-28.09		22,722		4.47		22.98		881,525		22,638		4.46		22.97		878,584
$33.18-41.73		176,143		5.79		40.90		3,677,064		112,000		5.77		40.61		2,370,865
		381,234		4.53	$	26.01	$	13,635,643		317,007		4.27	$	22.90	$	12,326,503

(d) Restricted Stock

During the six months ended June 30, 2011 and 2010, certain employees were granted an aggregate of 40,807 and 31,164 shares of restricted stock, respectively. The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock, are being expensed on a straight-line basis over the vesting period of the restricted stock, which is four years. During the six months ended June 30, 2011 and 2010, certain employees were also granted an aggregate of 50,999 and 37,914 shares of restricted stock, respectively, which, in addition to a service condition, are subject to a performance condition that impacts the number of shares in which the employee ultimately vests. The performance condition is based upon our achievement of the respective year’s FFO per share targets. Upon evaluating the results of the performance condition, the final number of shares is determined and such shares vest based on satisfaction of the service conditions. The service conditions of the awards provide for 20% vesting on each of the first and second anniversaries of the grant date and 30% vesting on each of the third and fourth anniversaries of the grant date provided the grantee continues employment on each anniversary date. Based on our 2010 FFO per diluted share and unit, all of the 2010 restricted stock satisfied the performance condition.

The expense recorded for the three months ended June 30, 2011 and 2010 related to grants of restricted stock was approximately $0.5 million and $0.4 million, respectively, and approximately $1.0 million and $0.7 million for the six months ended June 30, 2011 and 2010, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.4 million and $0.3 million for the three months ended June 30, 2011 and 2010, respectively, and approximately $0.7 million and $0.4 million for the six months ended June 30, 2011 and 2010, respectively. Unearned compensation representing the unvested portion of the restricted stock totaled $7.1 million and $4.2 million as of June 30, 2011 and December 31, 2010, respectively. We expect to recognize this unearned compensation over the next 3.2 years on a weighted average basis.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

13. Derivative Instruments

Currently, we use interest rate caps and swaps to manage our interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves.

To comply with the provisions of fair value accounting guidance, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.

Although we have determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by us and our counterparties. However, as of December 31, 2010, we have assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and have determined that the credit valuation adjustments are not significant to the overall valuation of our derivatives. As a result, we have determined that our derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

Cash Flow Hedges of Interest Rate Risk

Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements related to US LIBOR, GBP LIBOR and EURIBOR based mortgage loans. To accomplish this objective, we primarily use interest rate swaps and caps as part of our interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Under an interest rate cap, if the reference interest rate, such as one-month LIBOR, increases above the cap rate, the holder of the instrument receives a payment based on the notional value of the instrument, the length of the period, and the difference between the current reference rate and the cap rate. If the reference rate increases above the cap rate, the payment received under the interest rate cap will offset the increase in the payments due under the variable rate notes payable.

We record all our interest rate swaps and caps on the consolidated balance sheet at fair value. In determining the fair value of our interest rate swaps and caps, we consider the credit risk of our counterparties. These counterparties are generally larger financial institutions engaged in providing a variety of financial services. These institutions generally face similar risks regarding adverse changes in market and economic conditions, including, but not limited to, fluctuations in interest rates, exchange rates, equity and commodity prices and credit spreads. The current and pervasive disruptions in the financial markets have heightened the risks to these institutions.

Interest rate caps are viewed as a series of call options or caplets which exist for each period the cap agreement is in existence. As each caplet expires, the related cost of the expired caplet is amortized to interest expense with the remaining caplets carried at fair value. The value of interest rate caps is primarily impacted by interest rates, market expectations about interest rates, and the remaining life of the instrument. In general, increases in interest rates, or anticipated increases in interest rates, will increase the value of interest rate caps. As the remaining life of an interest rate cap decreases, the value of the instrument will generally decrease towards zero. The purchase price of an interest rate cap is amortized to interest expense over the contractual life of the instrument. For interest rate caps that are designated as cash flow hedges under accounting guidance as it relates to derivative instruments, the change in the fair value of an effective interest rate cap is recorded to accumulated other comprehensive income in equity. Amounts we are entitled to under interest rate caps, if any, are recognized on an accrual basis, and are recorded to as a reduction against interest expense in the accompanying consolidated statements of operations.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

Our agreements with some of our derivative counterparties provide either that (1) we could be declared in default on our derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to our default on the indebtedness or (2) we could be declared in default on our derivative obligations if we default on any of our indebtedness, including a default where repayment of the underlying indebtedness has not been accelerated by the lender.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income (loss) and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During 2011, such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt. The fair value of these derivatives was ($5.7) million and ($8.0) million at June 30, 2011 and December 31, 2010, respectively. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the three and six months ended June 30, 2011 and 2010, respectively, there were no ineffective portions to our interest rate swaps.

Amounts reported in accumulated other comprehensive loss related to interest rate swaps will be reclassified to interest expense as interest payments are made on our debt. As of June 30, 2011, we estimate that an additional $3.8 million will be reclassified as an increase to interest expense during the twelve months ending June 30, 2012, when the hedged forecasted transactions impact earnings.

As of June 30, 2011 and December 31, 2010, we had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk (in thousands):

Notional Amount												Fair Value at Significant Other Observable Inputs (Level 2)
As of June 30, 2011			As of December 31, 2010			Type of Derivative		Strike Rate		Effective Date	Expiration Date	As of June 30, 2011			As of December 31, 2010
$	—		$	19,515	(1)		Swap		4.944	Jul. 10, 2006	Apr. 10, 2011	$	—		$	(231	)
	68,747	(1)		66,858	(1)		Swap		2.980	April 6, 2009	Nov. 30, 2013		(2,606	)		(2,471	)
	15,024	(2)		13,978	(2)		Swap		3.981	May 17, 2006	Jul. 18, 2013		(593	)		(828	)
	10,870	(2)		10,113	(2)		Swap		4.070	Jun. 23, 2006	Jul. 18, 2013		(448	)		(621	)
	9,566	(2)		8,900	(2)		Swap		3.989	Jul. 27, 2006	Oct. 18, 2013		(412	)		(557	)
	44,534	(2)		41,430	(2)		Swap		3.776	Dec. 5, 2006	Jan. 18, 2012		(516	)		(1,129	)
	38,289	(2)		35,620	(2)		Swap		4.000	Dec. 20, 2006	Jan. 18, 2012		(491	)		(1,054	)
	43,506	(2)		40,152	(2)		Swap		2.703	Dec. 3, 2009	Sep. 4, 2014		(630	)		(1,139	)
	16,576			16,976			Cap		4.000	June 24, 2009	June 25, 2012		—			3
	20,500			20,500			Cap		4.000	Aug. 4, 2010	June 15, 2013		4			30
$	267,612		$	274,042								$	(5,692	)	$	(7,997	)

(1) Translation to U.S. dollars is based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

(2) Translation to U.S. dollars is based on exchange rate of $1.45 to €1.00 as of June 30, 2011 and $1.34 to €1.00 as of December 31, 2010.

We do not have any fair value measurements using significant unobservable inputs (Level 3) as of June 30, 2011 or December 31, 2010.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

14. Fair Value of Instruments

We disclose fair value information about all financial instruments, whether or not recognized in the condensed consolidated balance sheets, for which it is practicable to estimate fair value.

Current accounting guidance requires the Company to disclose fair value information about all financial instruments, whether or not recognized in the balance sheets, for which it is practicable to estimate fair value. The Company’s disclosures of estimated fair value of financial instruments at June 30, 2011 and December 31, 2010 were determined using available market information and appropriate valuation methods. Considerable judgment is necessary to interpret market data and develop estimated fair value. The use of different market assumptions or estimation methods may have a material effect on the estimated fair value amounts.

The carrying amounts for cash and cash equivalents, restricted cash, accounts and other receivables, accounts payable and other accrued liabilities, security deposits and prepaid rents approximate fair value because of the short-term nature of these instruments. As described in note 13, the interest rate cap and interest rate swaps are recorded at fair value.

We calculate the fair value of our mortgage loans, unsecured senior notes and exchangeable senior debentures based on currently available market rates assuming the loans are outstanding through maturity and considering the collateral and other loan terms, including excess exchange value which exists related to our 2026 Debentures. In determining the current market rate for fixed rate debt, a market spread is added to the quoted yields on federal government treasury securities with similar maturity dates to debt. The carrying value of our revolving credit facility approximates fair value, due to the short-term nature of this instrument along with the variability of interest rates.

As of June 30, 2011 and December 31, 2010, the aggregate estimated fair value and carrying value of our revolving credit facility, unsecured senior notes, exchangeable senior debentures, mortgage loans and other secured loan were as follows (in thousands):

	As of June 30, 2011				As of December 31, 2010
	Estimated Fair Value		Carrying Value		Estimated Fair Value		Carrying Value
Revolving credit facility (1)	$	341,417	$	341,417	$	333,534	$	333,534
Unsecured senior notes (2)(3)		1,535,735		1,465,587		1,103,983		1,066,030
Exchangeable senior debentures (2)(3)		500,134		314,588		504,241		353,702
Mortgage loans (2)		986,894		935,485		1,078,220		1,043,188
Other secured loan		10,725		10,500		10,720		10,500
	$	3,374,905	$	3,067,577	$	3,030,698	$	2,806,954

(1) The carrying value of our revolving credit facility approximates estimated fair value, due to the short-term nature of this instrument along with the variability of interest rates.

(2) Valuations for our unsecured senior notes and mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2015 Notes, 2020 Notes and 2021 Notes and exchangeable senior debentures are valued based on quoted market prices.

(3) The carrying value of the 2015 Notes, 2020 Notes and 2021 Notes are net of discount of $9,413 and $8,970 in the aggregate as of June 30, 2011 and December 31, 2010, respectively. The carrying values of our exchangeable senior debentures are net of discount of $113 and $1,456 as of June 30, 2011 and December 31, 2010, respectively, related to our 2026 Debentures.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

15. Related Party Transactions

In December 2006, we entered into ten leases with tel(x), pursuant to which tel(x) provides enhanced meet-me-room services to our customers. The initial terms of these leases expire in 2026, and tel(x) has options to extend them through 2046. tel(x) was acquired by GI Partners Fund II, LLP in November 2006, which, collectively with GI Partners Side Fund II, L.P., owns the majority of the outstanding stock of tel(x) as of June 30, 2011. Richard Magnuson, our director, Chairman and employee, is the chief executive officer of the advisor to GI Partners Fund II, LLP and GI Partners Side Fund II, L.P. Our condensed consolidated statements of operations include rental revenues of approximately $10.7 million and $5.8 million from tel(x) for the three months ended June 30, 2011 and 2010, respectively, and approximately $19.5 million and $10.9 million for the six months ended June 30, 2011 and 2010, respectively. Our condensed consolidated balance sheet includes deferred rent and unamortized deferred leasing costs of approximately $28.3 million and $21.0 million as of June 30, 2011 and December 31, 2010, respectively. In connection with the lease agreements, we entered into an operating agreement with tel(x), effective as of December 1, 2006, with respect to joint sales and marketing efforts, designation of representatives to manage the national relationship between us and tel(x) and future meet-me-room facilities. Under the operating agreement, tel(x) has a sixty-day option to enter into a meet-me-room lease for certain future meet-me-room buildings acquired by us or any buildings currently owned by us that are converted into a meet-me-room building. As of June 30, 2011, tel(x) leases 254,314 square feet of net rentable space from us under 39 lease agreements and as of December 31, 2010, tel(x) leased 202,987 square feet of net rentable space from us under 31 lease agreements.

We also entered into an agreement with tel(x), effective as of December 1, 2006, with respect to percentage rent arising out of potential future lease agreements for rentable space in buildings covered by the meet-me-room lease agreements. Percentage rent earned during the three months ended June 30, 2011 and 2010 amounted to approximately $0.6 million and $0.4 million, respectively, and $0.7 million and $0.4 million during the six months ended June 30, 2011 and 2010, respectively.

In addition, in connection with the lease agreements, we entered into a management agreement with tel(x), effective as of December 1, 2007, pursuant to which tel(x) agreed to provide us with certain management services in exchange for a management fee of one percent of rents actually collected by tel(x).

We are party to seven leases with SoftLayer, of which six are in place as of June 30, 2011 and the remaining one will commence in future periods. The initial terms of these leases expire from 2013 to 2025, and SoftLayer has options to extend them from 2018 through 2035. On August 3, 2010, GI Partners Fund III, L.P. acquired a controlling interest in SoftLayer. Richard Magnuson, our Chairman, is also a manager of the general partner to GI Partners Fund III, L.P. Our condensed consolidated statements of operations include rental revenues of approximately $4.6 million and $6.9 million from SoftLayer for the three and six months ended June 30, 2011, respectively. Our condensed consolidated statements of operations include rental revenues of approximately $0.4 million from SoftLayer for the three and six months ended June 30, 2010.

16. Commitments and Contingencies

We have agreed with the seller of 350 East Cermak Road to share a portion, not to exceed $135,000 per month, of rental revenue, adjusted for our costs to lease the premises, from the leases of the 192,000 square feet of space held for redevelopment. This revenue sharing agreement will terminate in May 2012. We made payments of approximately $0.8 million and $3.8 million to the seller during the six months ended June 30, 2011 and 2010, respectively. We have recorded approximately $1.5 million and $2.3 million for this contingent liability on our consolidated balance sheet at June 30, 2011 and December 31, 2010, respectively.

As part of the acquisition of Clonshaugh Industrial Estate I, we entered into an agreement with the seller whereby the seller is entitled to receive 40% of the net rental income generated by the existing building after we have received a 9% return on all capital invested in the property. As of February 6, 2006, the date we acquired this property, we have estimated the present value of these expected payments over the 10 year lease term to be approximately $1.1 million and this value has been recorded as a component of the purchase price. Accounts payable and other liabilities include $1.4 million and $1.3 million for this liability as of June 30, 2011 and December 31, 2010, respectively. We made payments of $0.1 million to the seller during the six months ended June 30, 2011 and 2010.

Our properties require periodic investments of capital for tenant-related capital expenditures and for general capital improvements and from time to time in the normal course of our business, we enter into various construction contracts with third parties that may obligate us to make payments. At June 30, 2011, we had open commitments related to construction contracts of approximately $119.2 million.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

June 30, 2011 and 2010

(unaudited)

As part of the acquisition of 29A International Business Park, the seller could earn additional consideration based on future net operating income growth in excess of certain performance targets, as defined. As of June 30, 2011, construction is not complete and there have been no leases executed that would cause an amount to become probable of payment and therefore no amount is accrued as of June 30, 2011. The maximum amount that could be earned by the seller is S$50.0 million (or approximately $40.7 million based on the exchange rate as of June 30, 2011). The earnout contingency expires in November 2020.

17. Subsequent Events

On July 14, 2011, we commenced an offer to repurchase, at the option of each holder, any and all of the Operating Partnership’s outstanding 2026 Debentures at a price equal to 100% of the principal amount, as required by the terms of the indenture governing the 2026 Debentures. The repurchase offer will expire at 5:00 p.m., New York City time, on August 11, 2011. We also distributed a Notice of Redemption to the holders of the 2026 Debentures that the Operating Partnership intends to redeem all of the outstanding 2026 Debentures, pursuant to its option under the indenture governing the 2026 Debentures, on August 18, 2011, at a price equal to 100% of the principal amount, plus accrued and unpaid interest thereon to, but excluding, the redemption date. In connection with the redemption, holders of the 2026 Debentures have the right to exchange their 2026 Debentures prior to 5:00 p.m., New York City time, on August 16, 2011. 2026 Debentures not surrendered pursuant to the repurchase offer prior to 5:00 p.m., New York City time, on August 11, 2011, or for exchange prior to 5:00 p.m., New York City time, on August 16, 2011, will be redeemed by the Company on August 18, 2011.

On July 21, 2011, we completed the acquisition of an 8.6 acre development site in Sydney, Australia. The purchase price was approximately AUD 10.1 million (or $11.0 million based on the rate of exchange on July 21, 2011) and was funded with borrowings under our revolving credit facility.

On July 25, 2011, we repaid the $25.0 million of 7.0% Series A unsecured notes under the Prudential shelf facility at maturity. The repayment was funded with borrowings under our revolving credit facility.

On July 25, 2011, we declared the following dividends per share and the Operating Partnership declared an equivalent distribution per unit:

Share Class	Series C Preferred Stock		Series D Preferred Stock		Common stock and common unit
Dividend and distribution amount	$	0.273438	$	0.343750	$	0.680000
Dividend and distribution payable date		September 30, 2011		September 30, 2011		September 30, 2011
Dividend payable to shareholders of record on		September 15, 2011		September 15, 2011		September 15, 2011
Annual equivalent rate of dividend and distribution	$	1.094	$	1.375	$	2.720

On July 26, 2011, we completed the acquisition of a redevelopment site in London, U.K. The purchase price was £12.9 million (or $21.2 million based on the rate of exchange on July 26, 2011) and was funded with borrowings under our revolving credit facility.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

The following discussion should be read in conjunction with the condensed consolidated financial statements and notes thereto appearing elsewhere in this report. This report contains forward-looking statements within the meaning of the federal securities laws. In particular, statements pertaining to our capital resources, expected use of proceeds from our equity distribution program, portfolio performance, leverage policy and acquisition and capital expenditure plans, as well as our discussion of “Factors Which May Influence Future Results of Operations,” contain forward-looking statements. Likewise, all of our statements regarding anticipated market conditions, demographics and results of operations are forward-looking statements. You can identify forward-looking statements by the use of forward-looking terminology such as “believes,” “expects,” “may,” “will,” “should,” “seeks,” “approximately,” “intends,” “plans,” “pro forma,” “estimates” or “anticipates” or the negative of these words and phrases or similar words or phrases which are predictions of or indicate future events or trends and discussions which do not relate solely to historical matters. You can also identify forward-looking statements by discussions of strategy, plans or intentions. Forward-looking statements involve numerous risks and uncertainties and you should not rely on them as predictions of future events. Forward-looking statements depend on assumptions, data or methods that may be incorrect or imprecise and that we may not be able to realize. We do not guarantee that the transactions and events described will happen as described or that they will happen at all. The following factors, among others, could cause actual results and future events to differ materially from those set forth or contemplated in the forward-looking statements: the impact of the recent deterioration in global economic, credit and market conditions including the potential downgrading of the U.S. government’s credit rating; current local economic conditions in our geographic markets; decreases in information technology spending, including as a result of economic slowdowns or recession; adverse economic or real estate developments in our industry or the industry sectors that we sell to (including risks relating to decreasing real estate valuations and impairment charges); our dependence upon significant tenants; bankruptcy or insolvency of a major tenant or a significant number of smaller tenants; defaults on or non-renewal of leases by tenants; our failure to obtain necessary debt and equity financing; increased interest rates and operating costs; risks associated with using debt to fund our business activities, including re-financing and interest rate risks, our failure to repay debt when due, adverse changes in our credit ratings or our breach of covenants or other terms contained in our loan facilities and agreements; financial market fluctuations; changes in foreign currency exchange rates; our inability to manage our growth effectively; difficulty acquiring or operating properties in foreign jurisdictions; our failure to successfully integrate and operate acquired or redeveloped properties; risks related to joint venture investments, including as a result of our lack of control of such investments; delays or unexpected costs in development or redevelopment of properties; decreased rental rates or increased vacancy rates; increased competition or available supply of data center space; our inability to successfully develop and lease new properties and space held for redevelopment; difficulties in identifying properties to acquire and completing acquisitions; our inability to acquire off-market properties; our inability to comply with the rules and regulations applicable to reporting companies; Digital Realty Trust, Inc.’s failure to maintain its status as a REIT; possible adverse changes to tax laws; restrictions on our ability to engage in certain business activities; environmental uncertainties and risks related to natural disasters; losses in excess of our insurance coverage; changes in foreign laws and regulations, including those related to taxation and real estate ownership and operation; and changes in local, state and federal regulatory requirements, including changes in real estate and zoning laws and increases in real property tax rates.

While forward-looking statements reflect our good faith beliefs, they are not guaranties of future performance. We disclaim any obligation to publicly update or revise any forward-looking statement to reflect changes in underlying assumptions or factors, new information, data or methods, future events or other changes.

The risks included here are not exhaustive, and additional factors could adversely affect our business and financial performance, including factors and risks included in other sections of this report, including under Part II, Item 1A, Risk Factors. Moreover, we operate in a very competitive and rapidly changing environment. New risk factors emerge from time to time and it is not possible for management to predict all such risk factors, nor can we assess the impact of all such risk factors on the business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. Given these risks and uncertainties, you should not place undue reliance on forward-looking statements as a prediction of actual results.

Occupancy percentages discussed in the following discussion, for some of our properties, are calculated based on factors in addition to contractually leased square feet, including available power, required support space and common area.

Overview

Our company. Digital Realty Trust, Inc. completed its initial public offering of common stock, or our IPO, on November 3, 2004. We believe that we have operated in a manner that has enabled Digital Realty Trust, Inc. to qualify, and have elected to treat Digital Realty Trust, Inc., as a REIT under Sections 856 through 860 of the Code. Digital Realty Trust, Inc. was formed on March 9, 2004. During the period from our formation until we commenced operations in connection with the completion of our IPO, we did not have any corporate activity other than the issuance of shares of Digital Realty Trust, Inc. common stock in connection with the initial capitalization of the company. Our operating partnership was formed on July 21, 2004.

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Business and strategy. Our primary business objectives are to maximize: (i) sustainable long-term growth in earnings and funds from operations per share and unit and (ii) cash flow and returns to our stockholders and our operating partnership’s unitholders, including through the payment of distributions. We expect to achieve our objectives by focusing on our core business of investing in and developing and redeveloping technology-related real estate. A significant component of our current and future internal growth is anticipated through the development of our existing space held for redevelopment and new properties. We target high quality, strategically located properties containing applications and operations critical to the day-to-day operations of corporate enterprise datacenter and technology industry tenants and properties that may be developed or redeveloped for such use. Most of our properties contain fully redundant electrical supply systems, multiple power feeds, above-standard precision cooling systems, raised floor areas, extensive in-building communications cabling and high-level security systems. We focus solely on technology-related real estate because we believe that the growth in corporate datacenter adoption and the technology-related real estate industry generally will continue to be superior to that of the overall economy.

As of June 30, 2011, we owned an aggregate of 96 technology-related real estate properties, excluding two properties held as investments in unconsolidated joint ventures, with approximately 17.1 million rentable square feet including approximately 2.1 million square feet of space held for redevelopment. At June 30, 2011, approximately 944,000 square feet of space was under construction for Turn-Key Datacenter^®, Powered Base Building^® and Build-to-Suit product, all of which will be income producing when complete, in seven U.S. domestic markets, two European markets and Singapore, consisting of approximately 382,000 square feet of development projects and 562,000 square feet of redevelopment projects.

We have developed detailed, standardized procedures for evaluating acquisitions to ensure that they meet our financial, technical and other criteria. We expect to continue to acquire additional assets as a part of our growth strategy. We intend to aggressively manage and lease our assets to increase their cash flow. We intend to continue to build out our redevelopment portfolio when justified by anticipated returns.

We may acquire properties subject to existing mortgage financing and other indebtedness or we may incur new indebtedness in connection with acquiring or refinancing these properties. Debt service on such indebtedness will have a priority over any cash dividends with respect to Digital Realty Trust, Inc.’s common stock and preferred stock. We currently intend to limit our indebtedness to 60% of our total enterprise value and, based on the closing price of Digital Realty Trust, Inc. common stock on June 30, 2011 of $61.78, our ratio of debt to total enterprise value was approximately 31% as of June 30, 2011. Our total enterprise value is defined as the sum of the market value of Digital Realty Trust, Inc.’s outstanding common stock (which may decrease, thereby increasing our debt to total enterprise value ratio), excluding options issued under our company’s incentive award plan, plus the liquidation value of Digital Realty Trust, Inc.’s preferred stock, plus the aggregate value of our operating partnership’s units not held by Digital Realty Trust, Inc. (with the per unit value equal to the market value of one share of its common stock and excluding long-term incentive units and Class C units), plus the book value of our total consolidated indebtedness.

Revenue base. As of June 30, 2011, we owned 96 properties through our operating partnership, excluding two properties held as investments in unconsolidated joint ventures. These properties are mainly located throughout the U.S., with 14 properties located in Europe, one property in Asia and one property in Canada. We, through our predecessor, acquired our first portfolio property in January 2002 and have added properties as follows:

Year Ended December 31:	Properties Acquired  (1)		Net Rentable Square Feet (2)		Square Feet of Space Held for Redevelopment as of June 30, 2011 (3)
2002		5		1,160,161		42,852
2003		6		1,058,360		—
2004		10		2,542,486		143,983
2005		20		3,329,834		180,463
2006		16		2,115,290		106,308
2007 (4)		13		2,003,922		168,305
2008		5		343,710		220,538
2009		6		721,207		676,100
2010		15		1,692,318		569,144
Properties owned as of June 30, 2011		96		14,967,288		2,107,693

(1) Excludes properties sold in 2007 and 2006: 100 Technology Center Drive (March 2007), 4055 Valley View Lane (March 2007) and 7979 East Tufts Avenue (July 2006). Also excludes a leasehold interest acquired in March 2007 related to an acquisition made in 2006.

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(2) Current net rentable square feet as of June 30, 2011, which represents the current square feet at buildings under lease as specified in the applicable lease agreements plus management’s estimate of space available for lease based on engineering drawings. Includes tenants’ proportional share of common areas but excludes space held for redevelopment.

(3) Redevelopment space is unoccupied space that requires significant capital investment in order to develop datacenter facilities that are ready for use. Most often this is shell space. However, in certain circumstances this may include partially built datacenter space that was not completed by previous ownership and requires a large capital investment in order to build out the space. The amounts included in this table represent redevelopment space as of June 30, 2011 in the properties acquired during the relevant period.

(4) Includes three developed buildings (43915 Devin Shafron Drive, 43830 Devin Shafron Drive and 43790 Devin Shafron Drive) placed into service in 2010 and 2011 that are being included with a property (Devin Shafron buildings) that was acquired in 2007.

As of June 30, 2011, the properties in our portfolio were approximately 93.9% leased excluding 2.1 million square feet held for redevelopment. Due to the capital-intensive and long-term nature of the operations being supported, our lease terms are generally longer than standard commercial leases. As of June 30, 2011, our original average lease term was approximately 14 years, with an average of approximately seven years remaining. The majority of our leasing since the completion of our IPO has been at lease terms shorter than 12 years. Our leases expiring on or before December 31, 2012 consist of 7.9% of our net rentable square feet excluding space held for redevelopment as of June 30, 2011.

Operating revenues from properties outside the United States were $27.5 million and $22.4 million for the three months ended June 30, 2011 and 2010, respectively, and $53.2 million and $45.5 million for the six months ended June 30, 2011 and 2010, respectively.

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Factors Which May Influence Future Results of Operations

Global market and economic conditions

In the United States and globally, market and economic conditions have been unprecedented over the past few years and challenging with tighter credit conditions and slower economic growth in all markets in which we own properties and conduct our operations. The U.S. and global economies have experienced a recession and face continued concerns about the systemic impact of adverse economic conditions, such as high energy costs, geopolitical issues, the availability and cost of credit, unstable global financial and mortgage markets, high corporate, consumer and governmental debt levels, high unemployment and declining residential and commercial real estate markets. Additionally, at present the U.S. government faces a potential downgrade of its credit rating, which could create broader financial turmoil and uncertainty.

As a result of these conditions, general economic conditions and the cost and availability of capital have been and may again be adversely affected in some or all of the markets in which we own properties and conduct our operations. Renewed or increased turbulence in the U.S., European and other international financial markets and economies may adversely affect our ability, and the ability of our tenants, to replace or renew maturing liabilities on a timely basis, access the capital markets to meet liquidity and capital expenditure requirements and may result in adverse effects on our, and our tenants’, financial condition and results of operations.

In addition, our access to funds under our revolving credit facility and other lines of credit depend on the ability of the lenders that are parties to such facilities to meet their funding commitments to us. We cannot assure you that long-term disruptions in the global economy and the return of tighter credit conditions among, and potential failures or nationalizations of, third party financial institutions as a result of such disruptions will not have an adverse effect on our lenders. If our lenders are not able to meet their funding commitments to us, our business, results of operation, cash flows and financial condition could be adversely affected.

If we do not have sufficient cash flow to continue operating our business and are unable to borrow additional funds, access our existing lines of credit or raise equity or debt capital, we may need to find alternative ways to increase our liquidity. Such alternatives may include, without limitation, curtailing development or redevelopment activity, disposing of one or more of our properties possibly on disadvantageous terms or entering into or renewing leases on less favorable terms than we otherwise would.

Rental income. The amount of rental income generated by the properties in our portfolio depends principally on our ability to maintain or improve the occupancy rates of currently leased space and to lease currently available space and space available from lease terminations. Excluding 2.1 million square feet held for redevelopment, as of June 30, 2011, the occupancy rate of the properties in our portfolio was approximately 93.9% of our net rentable square feet.

As of June 30, 2011, we had 1,585 leases with a total of 533 tenants. As of June 30, 2011, approximately 92% of our leases (on a rentable square footage basis) contained base rent escalations that were either fixed or indexed based on a consumer price index or other similar inflation related index.

The amount of rental income generated by us also depends on our ability to maintain or increase rental rates at our properties. Included in our approximately 15.0 million net rentable square feet, excluding redevelopment space, at June 30, 2011 is approximately 224,000 net rentable square feet of space with extensive datacenter improvements that is currently, or will shortly be, available for lease. Since our IPO, we have leased approximately 2,560,000 square feet of similar space. These Turn-Key Datacenters^® are effective solutions for tenants who lack the expertise or capital budget to provide their own extensive datacenter infrastructure and security. Our expertise in datacenter construction and operations enables us to lease space to these tenants at a significant premium over other uses. In addition, as of June 30, 2011, we had approximately 2.1 million square feet of redevelopment space, or approximately 12% of the total rentable space in our portfolio, including four vacant properties comprising approximately 409,000 square feet. Our ability to grow earnings depends in part on our ability to redevelop space and lease redevelopment space at favorable rates, which we may not be able to obtain. Redevelopment space requires significant capital investment in order to develop datacenter facilities that are ready for use and, in addition, we may require additional time or encounter delays in securing tenants for redevelopment space. We may purchase additional vacant properties and properties with vacant

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redevelopment space in the future. We will require additional capital to finance our redevelopment activities, which may not be available or may not be available on terms acceptable to us, including as a result of the conditions described above under “Global market and economic conditions.”

Economic downturns, including as a result of the conditions described above under “Global market and economic conditions,” or regional downturns affecting our sub-markets or downturns in the technology-related real estate industry that impair our ability to lease or renew or re-lease space, or otherwise reduce returns on our investments or the ability of our tenants to fulfill their lease commitments, as in the case of tenant bankruptcies, could adversely affect our ability to maintain or increase rental rates at our properties. As of June 30, 2011, we had no material tenants in bankruptcy.

Scheduled lease expirations. Our ability to re-lease expiring space at rental rates equal to or in excess of current rental rates will impact our results of operations. In addition to approximately 0.9 million square feet of available space in our portfolio, which excludes approximately 2.1 million square feet available for redevelopment as of June 30, 2011, leases representing approximately 5.2% and 2.7% of the net rentable square footage of our portfolio are scheduled to expire during the six months ending December 31, 2011 and for the year ending December 31, 2012, respectively.

During the six months ended June 30, 2011, we signed new leases totaling approximately 573,000 square feet of space and renewal leases totaling approximately 530,000 square feet of space. The following table summarizes our leasing activity in the six months ended June 30, 2011:

	Number of Leases (1)		Net Rentable Square Feet (2)		Expiring Rental Rate per Square Foot (3)		New Rental Rate per Square Foot (3)		Rental Rate % Change			Tenant Improvements/ Lease Commissions per Square Foot (4)		Weighted Average Lease Term (months)
Leasing Activity (5)(6)
Renewals Signed
Turn-Key Datacenter		17		180,553	$	155.98	$	169.13		8.43	%	$	2.60		64.5
Powered Base Building		4		114,430	$	21.55	$	24.64		14.34	%	$	5.91		148.8
Non-technical		17		235,396	$	29.15	$	25.02		(14.17	%)	$	7.68		93.8
New Leases Signed
Turn-Key Datacenter		33		262,042			$	189.80				$	35.10		99.5
Powered Base Building		2		185,602			$	23.34				$	13.35		131.6
Non-technical		40		125,788			$	21.43				$	11.27		46.4
Leasing Activity Summary (5)(6)
Turn-Key Datacenter		50		442,595			$	181.37
Powered Base Building		6		300,032			$	19.26
Non-technical		57		361,184			$	23.77

(1) The number of leases represents the leased-unit count; a lease could include multiple units.

(2) For some of our properties, we calculate square footage based on factors in addition to contractually leased square feet, including power, required support space and common area.

(3) Rental rates represent annual estimated cash rent per rentable square foot adjusted for straight-line rents in accordance with GAAP. GAAP rental rates are inclusive of tenant concessions, if any.

(4) Tenant Improvements/Lease Commissions for Powered Base Building leases excludes one Tenant Improvement allowance that has not yet been finalized. The final Tenant Improvement allowance amount will depend on actual costs incurred. When the Tenant Improvement allowance is finalized, fixed rent will be amended and will be incremental to the New Rental Rate per Square Foot reported above.

(5) Excludes 88 colocation leases signed for 44,304 rentable square feet at an average rate of $164.94 per square foot.

(6) Excludes four datacenter master leases signed for 34,193 rentable square feet, which were partially occupied by other customers, at an average rate of $84.27 per square foot.

Our ability to re-lease or renew expiring space at rental rates equal to or in excess of current rental rates will impact our results of operations. As of June 30, 2011, leases representing approximately 5.2% of the net rentable square footage of our portfolio are scheduled to expire during the six months ending December 31, 2011. We continue to see strong demand in our markets for datacenter space and expect the rental rates we are likely to achieve on any new (re-leased) or renewed datacenter space leases for 2011 expirations will generally be higher than the rates currently being paid for the same space. Our past performance may not be indicative of future results, and we cannot assure you that leases will be renewed or that

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our properties will be re-leased at all or at rental rates equal to or above the current average rental rates. Further, re-leased/renewed rental rates in a particular market may not be consistent with rental rates across our portfolio as a whole due to a number of factors, including local real estate conditions, local supply and demand for datacenter space, the condition of the property and whether the property, or space within the property, has been redeveloped.

Market concentration. We depend on the market for technology-based real estate in specific geographic regions and significant changes in these regional markets can impact our future results. As of June 30, 2011, our portfolio was geographically concentrated in the following metropolitan markets:

Metropolitan Market	Percentage of June 30, 2011 total annualized rent (1)
Silicon Valley		13.9	%
Northern Virginia		10.5	%
San Francisco		9.7	%
Chicago		9.5	%
New York Metro		9.4	%
Dallas		9.2	%
Phoenix		8.8	%
Boston		5.8	%
Los Angeles		4.8	%
London, England		4.2	%
Dublin, Ireland		3.0	%
Paris, France		2.7	%
Other		8.5	%
		100.0	%

(1) Annualized base rent represents the monthly contractual base rent (defined as cash base rent before abatements) under existing leases as of June 30, 2011 multiplied by 12.

Operating expenses. Our operating expenses generally consist of utilities, property and ad valorem taxes, property management fees, insurance and site maintenance costs, as well as rental expenses on our ground and building leases. In particular, our buildings require significant power to support the datacenter operations contained in them. Many of our leases contain provisions under which the tenants reimburse us for a portion of property operating expenses and real estate taxes incurred by us. However, we generally are not entitled to reimbursement of property operating expenses and real estate taxes under our leases for Turn-Key Datacenters^®. We also incur general and administrative expenses, including expenses relating to our asset management function, as well as significant legal, accounting and other expenses related to corporate governance, SEC reporting and compliance with the various provisions of the Sarbanes-Oxley Act. Increases or decreases in such operating expenses will impact our overall performance. We expect to incur additional operating expenses as we continue to expand.

Climate change legislation. In June 2009, the U.S. House of Representatives approved comprehensive clean energy and climate change legislation intended to cut greenhouse gas, or GHG, emissions, create new clean energy jobs and enhance the energy independence of the United States, which included a cap-and-trade program for GHG emissions. The U.S. Senate did not pass similar legislation during 2009 or 2010, and following Congressional elections in November 2010 (in which control of the House of Representatives passed from the Democratic Party to the Republican Party), the likelihood that Congress will pass any climate change and/or energy legislation that would include a cap-and-trade program, or any similar type program, for GHG emissions in 2011 has diminished. As a result, action to reduce GHG emissions likely will be focused on regulatory agencies, primarily the U.S. Environmental Protection Agency, or EPA, and state actions. The EPA has been moving aggressively to regulate GHG emissions

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from automobiles and large stationary sources, including electricity producers, using its own authority under the Clean Air Act. Some of those regulations have been finalized and currently are in litigation. States have also taken actions to regulate GHG emissions. For example, California enacted AB 32, the Global Warming Solutions Act of 2006, which established the first statewide program in the United States to limit GHG emissions and impose penalties for non-compliance. The California Air Resources Board, or CARB, has taken, and plans to take, various actions to implement AB 32, including the approval in December 2008 of an AB 32 Scoping Plan summarizing the main GHG-reduction strategies for California. CARB approved in December 2010 a GHG cap-and-trade program, which is scheduled to take effect in 2012. As another example of state action, the Western Climate Initiative, which currently includes seven states and four Canadian provinces, has developed GHG reduction strategies, among them a GHG cap-and-trade program. In addition, since 2005 the European Union (including the United Kingdom) has been operating under a cap-and-trade program, which directly affects the largest emitters of greenhouse gases, including electricity producers from whom we purchase power. Any additional taxation or regulation of energy use, including as a result of (i) new legislation that Congress may pass, (ii) the regulations that the U.S. EPA has proposed or finalized, (iii) regulations under legislation that states have passed or may pass, or (iv) any further reductions in the EU greenhouse gas cap could significantly increase our costs, and we may not be able to effectively pass all of these costs on to our tenants.

Interest rates. As of June 30, 2011, we had approximately $267.6 million of variable rate debt, all of which was mortgage debt subject to interest rate cap or swap agreements, and $341.4 million was outstanding on our revolving credit facility. The availability of debt and equity capital has significantly decreased as a result of the circumstances described above under “Global market and economic conditions.” The effects on commercial real estate mortgages, if available, include, but may not be limited to: higher loan spreads, tightened loan covenants, reduced loan to value ratios resulting in lower borrower proceeds and higher principal payments. Potential future increases in interest rates and credit spreads may increase our interest expense and fixed charges and negatively affect our financial condition and results of operations, potentially impacting our future access to the debt and equity capital markets. Increased interest rates may also increase the risk that the counterparties to our swap agreements will default on their obligations, which could further increase our interest expense. If we cannot obtain capital from third party sources, we may not be able to acquire or develop properties when strategic opportunities exist, satisfy our debt service obligations or pay the cash dividends to Digital Realty Trust, Inc.’s stockholders necessary to maintain its qualification as a REIT.

Demand for datacenter space. Our portfolio of properties consists primarily of technology-related real estate and datacenter real estate in particular. A decrease in the demand for, or increase in supply of, datacenter space, Internet gateway facilities or other technology-related real estate would have a greater adverse effect on our business and financial condition than if we owned a portfolio with a more diversified tenant base or less specialized use. Our redevelopment activities make us particularly susceptible to general economic slowdowns, including recessions and the other circumstances described above under “Global market and economic conditions,” as well as adverse developments in the corporate datacenter, Internet and data communications and broader technology industries. Any such slowdown or adverse development could lead to reduced corporate IT spending or reduced demand for datacenter space. Reduced demand could also result from business relocations, including to markets that we do not currently serve. Changes in industry practice or in technology, such as virtualization technology, more efficient computing or networking devices, or devices that require higher power densities than today’s devices, could also reduce demand for the physical datacenter space we provide or make the tenant improvements in our facilities obsolete or in need of significant upgrades to remain viable. In addition, the development of new technologies, the adoption of new industry standards or other factors could render many of our tenants’ current products and services obsolete or unmarketable and contribute to a downturn in their businesses, thereby increasing the likelihood that they default under their leases, become insolvent or file for bankruptcy. In addition, demand for datacenter space in our properties, or the rates at which we lease space, may be adversely impacted either across our portfolio or in specific submarkets as a result of an increase in the number of competitors, or the amount of space being offered in our markets and other markets by our competitors.

Critical Accounting Policies

Our discussion and analysis of our financial condition and results of operations are based upon our condensed consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP. The preparation of these financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses in the reporting period. Our actual results may differ from these estimates. We have provided a summary of our significant accounting policies in note 2 to our condensed consolidated financial statements included elsewhere in this report. We describe below those accounting policies that require material subjective or complex judgments and that have the most significant impact on our financial condition and consolidated results of operations. Our management evaluates these estimates on an ongoing basis, based upon information currently available and on various assumptions management believes are reasonable as of the date on the front cover of this report.

Investments in Real Estate

Acquisition of real estate. The price that we pay to acquire a property is impacted by many factors including the condition of the property and improvements, the occupancy of the building, the existence of above and below market tenant leases, the creditworthiness of the tenants, favorable or unfavorable financing, above or below market ground leases and numerous other factors.

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Accordingly, we are required to make subjective assessments to allocate the purchase price paid to acquire investments in real estate among the assets acquired and liabilities assumed based on our estimate of the fair values of such assets and liabilities. This includes determining the value of the property and improvements, land, any ground leases, tenant improvements, in-place tenant leases, tenant relationships, the value (or negative value) of above (or below) market leases, any debt or deferred taxes assumed from the seller or loans made by the seller to us and any building leases assumed from the seller. Each of these estimates requires a great deal of judgment and some of the estimates involve complex calculations. These allocation assessments have a direct impact on our results of operations. For example, if we were to allocate more value to land, there would be no depreciation with respect to such amount. If we were to allocate more value to the property as opposed to allocating to the value of in-place tenant leases, this amount would be recognized as an expense over a much longer period of time. This potential effect occurs because the amounts allocated to property are depreciated over the estimated lives of the property whereas amounts allocated to in-place tenant leases are amortized over the estimated term (including renewal and extension assumptions) of the leases. Additionally, the amortization of the value (or negative value) assigned to above (or below) market rate leases is recorded as an adjustment to rental revenue as compared to amortization of the value of in-place tenant leases and tenant relationships, which is included in depreciation and amortization in our consolidated statements of operations.

Capitalization of Costs. Direct and indirect project costs that are clearly associated with the development and redevelopment of properties are capitalized as incurred. Project costs include all costs directly associated with the development or redevelopment of a property, including construction costs, interest, property taxes, insurance, legal fees and costs of personnel working on the project. Indirect costs that do not clearly relate to the projects under development/redevelopment are not capitalized and are charged to expense as incurred.

Capitalization of costs begins when activities, including development of plans, process of obtaining permits from governmental authorities and physical construction, that are necessary to get the asset ready for its intended use are in progress and costs have been incurred. Capitalization of costs ceases when the development/redevelopment project is substantially complete and ready for its intended use. Determining when a development/redevelopment project commences, and when it is substantially complete and ready for its intended use involves a degree of judgment. We generally consider a development/redevelopment project to be substantially complete and ready for its intended use upon recommissioning, which is when the redeveloped/developed project has been tested at full load, or receipt of a certificate of occupancy. We cease cost capitalization if activities necessary for the development/redevelopment of the property have been suspended. Capitalized costs are allocated to the specific components of a project that are benefited.

Useful lives of assets. We are required to make subjective assessments as to the useful lives of our properties for purposes of determining the amount of depreciation to record on an annual basis with respect to our investments in real estate. These assessments have a direct impact on our net income because if we were to shorten the expected useful lives of our investments in real estate we would depreciate such investments over fewer years, resulting in more depreciation expense and lower net income on an annual basis.

Asset impairment evaluation. We review each of our properties for indicators that its carrying amount may not be recoverable. Examples of such indicators may include a significant decrease in the market price of the property, a significant adverse change in the extent or manner in which the property is being used in its physical condition or expected to be used based on the underwriting at the time of acquisition, an accumulation of costs significantly in excess of the amount originally expected for the acquisition or development of the property, or a history of operating or cash flow losses of the property. When such impairment indictors exist, we review an estimate of the future cash flows (excluding interest charges) expected to result from the real estate investment’s use and eventual disposition and compare that estimate to the carrying value of the property. We consider factors such as future operating income, trends and prospects, as well as the effects of leasing demand, competition and other factors. If our undiscounted net cash flow evaluation indicates that we are unable to recover the carrying value of a real estate investment, an impairment loss is recorded to the extent that the carrying value exceeds the estimated fair value of the property. These losses have a direct impact on our net income because recording an impairment loss results in an immediate negative adjustment to net income. The evaluation of anticipated cash flows is highly subjective and is based in part on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results in future periods. Since cash flows on properties considered to be long-lived assets to be held and used are considered on an undiscounted basis to determine whether the carrying value of a property is recoverable, our strategy of holding properties over the long-term directly decreases the likelihood of their carrying values not being recoverable and therefore requiring the recording of an impairment loss. If our strategy changes or market conditions otherwise dictate an earlier sale date, an impairment loss may be recognized and such loss could be material. If we determine that the asset fails the recoverability test, the affected assets must be reduced to their fair value. No such impairment losses have been recognized to date.

We generally estimate the fair value of rental properties utilizing a discounted cash flow analysis that includes projections of future revenues, expenses and capital improvement costs that a market participant would use based on the highest and best use of the asset, which is similar to the income approach that is commonly utilized by appraisers.

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Revenue Recognition

Rental income is recognized using the straight-line method over the terms of the tenant leases. Deferred rents included in our consolidated balance sheets represent the aggregate excess of rental revenue recognized on a straight-line basis over the contractual rental payments under the terms of the leases. Many of our leases contain provisions under which the tenants reimburse us for a portion of property operating expenses and real estate taxes incurred by us. However, we generally are not entitled to reimbursement of property operating expenses, other than utility expense, and real estate taxes under our leases for Turn-Key Datacenters^®. Such reimbursements are recognized in the period that the expenses are incurred. Lease termination fees are recognized over the remaining term of the lease, effective as of the date the lease modification is finalized, assuming collection is not considered doubtful. As discussed above, we recognize amortization of the value of acquired above or below market tenant leases as a reduction of rental income in the case of above market leases or an increase to rental revenue in the case of below market leases.

We must make subjective estimates as to when our revenue is earned and the collectability of our accounts receivable related to minimum rent, deferred rent, expense reimbursements, lease termination fees and other income. We specifically analyze accounts receivable and historical bad debts, tenant concentrations, tenant creditworthiness and current economic trends when evaluating the adequacy of the allowance for bad debts. These estimates have a direct impact on our net income because a higher bad debt allowance would result in lower net income, and recognizing rental revenue as earned in one period versus another would result in higher or lower net income for a particular period.

Share-based Awards

We recognize compensation expense related to share-based awards. We generally amortize this compensation expense over the vesting period of the award. The calculation of the fair value of share-based awards is subjective and requires several assumptions over such items as expected stock volatility, dividend payments and future company results. These assumptions have a direct impact on our net income because a higher share-based awards amount would result in lower net income for a particular period.

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Results of Operations

The discussion below relates to our financial condition and results of operations for the three and six months ended June 30, 2011 and 2010. A summary of our operating results for the three and six months ended June 30, 2011 and 2010 is as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Statement of Operations Data:
Total operating revenues	$	267,881		$	197,464		$	518,622		$	389,243
Total operating expenses		(191,161	)		(143,314	)		(367,237	)		(279,898	)
Operating income		76,720			54,150			151,385			109,345
Other expenses, net		(38,492	)		(34,248	)		(74,145	)		(63,857	)
Net income	$	38,228		$	19,902		$	77,240		$	45,488

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Our property portfolio has experienced consistent and significant growth since the first property acquisition in January 2002. As a result of this growth, our period-to-period comparison of our financial performance focuses on the impact on our revenues and expenses resulting both from the new property additions to our portfolio, as well as on a “same store” property basis (same store properties are properties that were owned and operated for the entire current period and the entire immediate preceding year). The following table identifies each of the properties in our portfolio acquired from January 1, 2010 through June 30, 2011.

Acquired Buildings			Acquisition Date		Redevelopment Space as of June 30, 2011 (1)		Net Rentable Square Feet Excluding Redevelopment Space (2)		Square Feet Including Redevelopment Space		Occupancy Rate as of June 30, 2011 (3)
As of December 31, 2009 (81 properties)						1,471,811		12,944,040		14,415,851		94.4	%
January 1, 2010 through June 30, 2011
128 First Avenue				Jan-10		—		274,750		274,750		99.6
55 Middlesex Turnpike				Jan-10		—		106,000		106,000		89.7
60-80 Merritt Boulevard				Jan-10		—		169,540		169,540		100.0
43915 Devin Shafron Drive	(4	)		Jan-10		3,247		129,033		132,280		100.0
1725 Comstock Street				Apr-10		—		39,643		39,643		100.0
3105 and 3115 Alfred Street				May-10		23,917		25,941		49,858		100.0
Cateringweg 5				Jun-10		55,972		—		55,972		—
365 Main Street				Jul-10		—		226,981		226,981		84.4
720 2nd Street				Jul-10		—		121,220		121,220		95.8
2260 East El Segundo Boulevard				Jul-10		—		132,240		132,240		100.0
2121 South Price Road				Jul-10		—		293,479		293,479		96.5
4030-4050 La Fayette				Jul-10		30,333		115,070		145,403		75.8
800 Central Expressway				Aug-10		150,000		—		150,000		—
2950 Zanker Road				Aug-10		—		69,700		69,700		100.0
900 Dorothy Drive				Aug-10		—		56,176		56,176		100.0
29A International Business Park				Nov-10		308,922		61,578		370,500		16.8
43830 Devin Shafron Drive	(4	)		Mar-11		63,491		49,759		113,250		9.1
43790 Devin Shafron Drive	(4	)		Jun-11		—		152,138		152,138		100.0
Subtotal						635,882		2,023,248		2,659,130		90.8	%
Total						2,107,693		14,967,288		17,074,981		93.9	%

(1) Redevelopment space requires significant capital investment in order to develop datacenter facilities that are ready for use. Most often this is shell space. However, in certain circumstances this may include partially built datacenter space that was not completed by previous ownership and requires a large capital investment in order to build out the space.

(2) Net rentable square feet at a building represents the current square feet at that building under lease as specified in the lease agreements plus management’s estimate of space available for lease based on engineering drawings. Net rentable square feet includes tenants’ proportional share of common areas but excludes space held for redevelopment.

(3) Occupancy rates exclude redevelopment space. For some of our properties, we calculate occupancy based on factors in addition to contractually leased square feet, including available power, required support space and common area.

(4) Represents three developed buildings placed into service in 2010 and 2011 that are being included with a property (Devin Shafron buildings) that was acquired in 2007.

In May 2008, we acquired 701 & 717 Leonard Street, a parking garage in Dallas, Texas; however, we exclude the acquisition from our property count because it is located adjacent to our internet gateway datacenter located at 2323 Bryan Street and is not considered a separate property.

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Comparison of the Three Months Ended June 30, 2011 to the Three Months Ended June 30, 2010 and the Six Months Ended June 30, 2011 to the Six Months Ended June 30, 2010

Portfolio

As of June 30, 2011, our portfolio consisted of 96 properties, excluding two properties held as investments in unconsolidated joint ventures, with an aggregate of 17.1 million net rentable square feet including 2.1 million square feet held for redevelopment compared to a portfolio consisting of 87 properties, excluding one property held as an investment in an unconsolidated joint venture, with an aggregate of 15.2 million net rentable square feet including 1.9 million square feet held for redevelopment as of June 30, 2010. The increase in our portfolio reflects the acquisition of nine properties in the twelve months ended June 30, 2011.

Operating Revenues

Operating revenues during the three and six months ended June 30, 2011 and 2010 were as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2011		2010		Change		2011		2010		Change
Rental	$	202,806	$	156,831	$	45,975	$	399,601	$	308,138	$	91,463
Tenant reimbursements		51,311		39,597		11,714		103,145		78,655		24,490
Construction management fee		13,759		1,036		12,723		15,576		2,450		13,126
Other		5		—		5		300		—		300
Total operating revenues	$	267,881	$	197,464	$	70,417	$	518,622	$	389,243	$	129,379

As shown by the same store and new properties table below, the increases in rental revenues and tenant reimbursement revenues for the three and six month periods ended June 30, 2011 compared to the same periods in 2010 were primarily due to new leasing at our same store properties and acquisition of properties. We acquired nine properties during the twelve months ended June 30, 2011.

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The following table shows operating revenues for new properties (properties that were acquired after December 31, 2009) and same store properties (all other properties) (in thousands):

	Same Store						New Properties
	Three Months Ended June 30,						Three Months Ended June 30,
	2011		2010		Change		2011		2010		Change
Rental	$	157,650	$	143,031	$	14,619	$	45,156	$	13,800	$	31,356
Tenant reimbursements		38,148		35,873		2,275		13,163		3,724		9,439
Construction management fee		—		—		—		13,759		1,036		12,723
Other		—		—		—		5		—		5
Total operating revenues	$	195,798	$	178,904	$	16,894	$	72,083	$	18,560	$	53,523
	Same Store						New Properties
	Six Months Ended June 30,						Six Months Ended June 30,
	2011		2010		Change		2011		2010		Change
Rental	$	310,712	$	284,252	$	26,460	$	88,889	$	23,886	$	65,003
Tenant reimbursements		76,567		71,710		4,857		26,578		6,945		19,633
Construction management fee		—		—		—		15,576		2,450		13,126
Other		295		—		295		5		—		5
Total operating revenues	$	387,574	$	355,962	$	31,612	$	131,048	$	33,281	$	97,767

Same store rental revenues increased for the three and six months ended June 30, 2011 compared to the same periods in 2010 primarily as a result of new leases at our properties during the twelve months ended June 30, 2011 due to strong demand for datacenter space, including leases of completed redevelopment space, the largest of which was for space in 43915 Devin Shafron Drive, 365 South Randolphville Road, 1232 Alma Road, 120 East Van Buren Drive and 3 St. Anne’s Boulevard. Rental revenue included amounts earned from leases with tel(x) and SoftLayer, both related parties, of approximately $15.3 million and $6.2 million for the three months ended June 30, 2011 and 2010, respectively, and approximately $26.4 million and $11.3 million for the six months ended June 30, 2011 and 2010, respectively. Same store tenant reimbursement revenues increased for the three and six months ended June 30, 2011 as compared to the same periods in 2010 primarily as a result of new leasing and higher utility and operating expenses being billed to our tenants, the largest occurrences of which were at 43915 Devin Shafron Drive, Unit 9, Blanchardstown Corporate Park and 3 Corporate Place.

For the three and six months ended June 30, 2011, 2121 South Price Road, 365 Main Street, 720 2^nd Street and 2260 East El Segundo Boulevard contributed $30.5 million, or approximately 57%, and $61.9 million, or approximately 63%, respectively, of the new properties increase in total revenues compared to the same periods in 2010.

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Operating Expenses and Interest Expense

Operating expenses and interest expense during the three and six months ended June 30, 2011 and 2010 were as follows (in thousands):

	Three Months Ended June 30,							Six Months Ended June 30,
	2011		2010		Change			2011		2010		Change
Rental property operating and maintenance	$	72,337	$	53,935	$	18,402		$	144,060	$	106,530	$	37,530
Property taxes		13,962		12,748		1,214			27,433		25,469		1,964
Insurance		1,998		1,846		152			4,049		3,581		468
Construction management		11,199		471		10,728			12,936		1,118		11,818
Depreciation and amortization		76,848		59,860		16,988			150,766		117,392		33,374
General and administrative		14,077		12,574		1,503			26,482		23,093		3,389
Transactions		740		1,715		(975	)		1,421		2,548		(1,127	)
Other		—		165		(165	)		90		167		(77	)
Total operating expenses	$	191,161	$	143,314	$	47,847		$	367,237	$	279,898	$	87,339
Interest expense	$	39,334	$	33,162	$	6,172		$	75,416	$	64,064	$	11,352

As shown in the same store and new properties table below, total expenses for the three and six months ended June 30, 2011 increased compared to the same periods in 2010 primarily as a result of higher same store utility and maintenance costs as well as increased depreciation and interest expense from additional redevelopment projects placed into service and from recently acquired properties.

The following table shows expenses for new properties (properties that were acquired after December 31, 2009) and same store properties (all other properties) (in thousands):

	Same Store							New Properties
	Three Months Ended June 30,							Three Months Ended June 30,
	2011		2010		Change			2011		2010		Change
Rental property operating and maintenance	$	50,859	$	47,442	$	3,417		$	21,478	$	6,493	$	14,985
Property taxes		11,090		11,071		19			2,872		1,677		1,195
Insurance		1,579		1,743		(164	)		419		103		316
Construction management		—		—		—			11,199		471		10,728
Depreciation and amortization		60,692		55,419		5,273			16,156		4,441		11,715
General and administrative (1)		14,077		12,574		1,503			—		—		—
Transactions		—		—		—			740		1,715		(975	)
Other		—		165		(165	)		—		—		—
Total operating expenses	$	138,297	$	128,414	$	9,883		$	52,864	$	14,900	$	37,964
Interest expense	$	39,176	$	33,162	$	6,014		$	158	$	—	$	158
	Same Store							New Properties
	Six Months Ended June 30,							Six Months Ended June 30,
	2011		2010		Change			2011		2010		Change
Rental property operating and maintenance	$	102,372	$	95,812	$	6,560		$	41,688	$	10,718	$	30,970
Property taxes		22,067		22,534		(467	)		5,366		2,935		2,431
Insurance		3,122		3,404		(282	)		927		177		750
Construction management		—		—		—			12,936		1,118		11,818
Depreciation and amortization		119,361		109,768		9,593			31,405		7,624		23,781
General and administrative (1)		26,482		23,093		3,389			—		—		—
Transactions		—		—		—			1,421		2,548		(1,127	)
Other		90		167		(77	)		—		—		—
Total operating expenses	$	273,494	$	254,778	$	18,716		$	93,743	$	25,120	$	68,623
Interest expense	$	75,089	$	64,064	$	11,025		$	327	$	—	$	327

(1) General and administrative expenses are included in same store as they are not allocable to specific properties.

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Same store rental property operating and maintenance expenses increased in the three and six months ended June 30, 2011 compared to the same periods in 2010 primarily as a result of higher utility rates in several of our properties along with redevelopment projects being placed into service leading to higher utility expense in 2011. We capitalized amounts relating to compensation expense of employees directly engaged in construction and leasing activities of $6.1 million and $4.6 million for the three months ended June 30, 2011 and 2010, respectively, and $12.3 million and $8.8 million for the six months ended June 30, 2011 and 2010, respectively.

Same store depreciation and amortization expense increased in the three and six months ended June 30, 2011 compared to the same periods in 2010, principally because of depreciation of redevelopment projects that were placed into service in the final six months of 2010 and during 2011.

General and administrative expenses for the three and six months ended June 30, 2011 increased compared to the same periods in 2010 primarily due to the growth of our company, which resulted in more employees, additional incentive compensation, and higher professional fees and marketing expenses.

Transactions expense decreased in the three and six months ended June 30, 2011 compared to the same periods in 2010, principally because of higher expenses related to the acquisitions of the New England Portfolio and 365 Main Portfolio in 2010.

Same store interest expense increased for the three and six months ended June 30, 2011 as compared to the same periods in 2010 primarily as a result of higher average outstanding debt balances during 2011 compared to 2010 primarily due to the issuance of our 5.875% Notes due 2020, the issuance of our 4.50% Notes due 2015, the issuance of our 5.250% Notes due 2021 and draws on our Prudential shelf facility. During the three months ended June 30, 2011 and 2010, we capitalized interest of approximately $4.2 million and $2.5 million, respectively, and $8.9 million and $4.4 million for the six months ended June 30, 2011 and 2010, respectively.

New properties increases were caused by properties acquired during the period from January 1, 2010 to June 30, 2011. For the three and six months ended June 30, 2011, 365 Main Street, 2121 South Price Road, 720 2^nd Street and 2260 East El Segundo Boulevard contributed $23.1 million, or approximately 61%, and $43.6 million, or approximately 64%, respectively, of the new properties increase in total operating expenses compared to the same periods in 2010.

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Liquidity and Capital Resources of the Parent Company

In this “Liquidity and Capital Resources of the Parent Company” section and in the “Liquidity and Capital Resources of the Operating Partnership” section below, the term, our “parent company,” refers to Digital Realty Trust, Inc. on an unconsolidated basis, excluding our operating partnership.

Analysis of Liquidity and Capital Resources

Our parent company’s business is operated primarily through our operating partnership of which our parent company is the sole general partner and which it consolidates for financial reporting purposes. Because our parent company operates on a consolidated basis with our operating partnership, the section entitled “Liquidity and Capital Resources of the Operating Partnership” should be read in conjunction with this section to understand the liquidity and capital resources of our parent company on a consolidated basis and how our company is operated as a whole.

Our parent company issues public equity from time to time, but does not otherwise generate any capital itself or conduct any business itself, other than incurring certain expenses in operating as a public company which are fully reimbursed by the operating partnership. Our parent company itself does not hold any indebtedness other than guarantees of some of the indebtedness of our operating partnership, and its only material asset is its ownership of partnership interests of our operating partnership. Therefore, the consolidated assets and liabilities and the consolidated revenues and expenses of our parent company and our operating partnership are the same on their respective financial statements, except for immaterial differences related to cash, other assets and accrued liabilities that arise from public company expenses paid by our parent company. However, all debt is held directly or indirectly at the operating partnership level. Our parent company’s principal funding requirement is the payment of dividends on its common and preferred shares. Our parent company’s principal source of funding for its dividend payments is distributions it receives from our operating partnership.

As the sole general partner of our operating partnership, our parent company has the full, exclusive and complete responsibility for our operating partnership’s day-to-day management and control. Our parent company causes our operating partnership to distribute such portion of its available cash as our parent company may in its discretion determine, in the manner provided in our operating partnership’s partnership agreement. Our parent company receives proceeds from its equity issuances from time to time, but is generally required by our operating partnership’s partnership agreement to contribute the proceeds from its equity issuances to our operating partnership in exchange for partnership units of our operating partnership.

Our parent company is a well-known seasoned issuer with an effective shelf registration statement filed on May 1, 2009, as amended by Post-Effective Amendment No. 1 filed on November 15, 2010, that allows our parent company to register unspecified various classes of equity securities. As circumstances warrant, our parent company may issue equity from time to time on an opportunistic basis, dependent upon market conditions and available pricing. Any proceeds from such equity issuances would be generally contributed to our operating partnership in exchange for additional equity interests in our operating partnership. Our operating partnership may use the proceeds to acquire additional properties, to fund development and redevelopment opportunities and for general working capital purposes, including potentially for the repurchase, redemption or retirement of outstanding debt or preferred securities.

The liquidity of our parent company is dependent on our operating partnership’s ability to make sufficient distributions to our parent company. The primary cash requirement of our parent company is its payment of dividends to its stockholders. Our parent company also guarantees some of our operating partnership’s unsecured debt. If our operating partnership fails to fulfill its debt requirements, which trigger parent company guarantee obligations, then our parent company will be required to fulfill its cash payment commitments under such guarantees. However, our parent company’s only asset is its investment in our operating partnership.

We believe our operating partnership’s sources of working capital, specifically its cash flow from operations, and borrowings available under its unsecured revolving credit facility, are adequate for it to make its distribution payments to our parent company and, in turn, for our parent company to make its dividend payments to its stockholders. However, we cannot assure you that our operating partnership’s sources of capital will continue to be available at all or in amounts sufficient to meet its needs, including its ability to make distribution payments to our parent company. The unavailability of capital could adversely affect our operating partnership’s ability to pay its distributions to our parent company, which would in turn, adversely affect our parent company’s ability to pay cash dividends to its stockholders.

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In June 2011, our parent company completed its previous At-the-Market equity distribution program, under which it sold 6,790,653 shares of its common stock for gross proceeds of $400.0 million, resulting in net proceeds of approximately $394.0 million after deducting commissions and before offering expenses. Our parent company has used and intends to use the proceeds from the sale of shares pursuant to the program to temporarily repay borrowings under our operating partnership’s revolving credit facility, to acquire additional properties, to fund development and redevelopment opportunities and for general corporate purposes, including potentially the repayment or repurchase of outstanding debt. For the three and six months ended June 30, 2011, our parent company generated net proceeds of approximately $171.2 million and $176.9 million, respectively, from the issuance of approximately 2.9 million and 3.0 million common shares, respectively, under the program at an average price of $60.58 and $60.51 per share, respectively, after payment of approximately $2.6 million and $2.7 million, respectively, of commissions to the sales agents. The proceeds from the issuances were contributed to our operating partnership in exchange for the issuance of approximately 2.9 million and 3.0 million common units, respectively, to our parent company. For the three and six months ended June 30, 2010, our parent company generated net proceeds of approximately $12.7 million and $67.5 million, respectively, from the issuance of approximately 0.2 million and 1.3 million common shares, respectively, under the program at an average price of $58.38 and $51.87 per share, respectively, after payment of approximately $0.2 million and $1.0 million, respectively, of commissions to the sales agents. The proceeds from the issuances were contributed to our operating partnership in exchange for the issuance of approximately 0.2 million and 1.3 million common units, respectively, to our parent company.

On June 29, 2011, our parent company commenced a new At-the-Market equity distribution program under which it can issue and sell up to $400.0 million of its common stock through, at its discretion, any of Merrill Lynch, Pierce Fenner & Smith Incorporated, Citigroup Global Markets Inc., Credit Suisse Securities (USA) LLC, Deutsche Bank Securities Inc. and Morgan Stanley & Co. LLC as its sales agents. During the three months ended June 30, 2011, no sales were made under the new At-the-Market equity distribution program. Our parent company intends to use the net proceeds from the program to temporarily repay borrowings under our operating partnership’s revolving credit facility, to acquire additional properties, to fund development and redevelopment opportunities and for general working capital purposes, including potentially for the repurchase, redemption or retirement of outstanding debt or preferred equity securities. The sales of common stock under the equity distribution program will be made in “at the market” offerings as defined in Rule 415 of the Securities Act.

During the six months ended June 30, 2011, our operating partnership exchanged approximately $40.5 million aggregate principal amount of its 4.125% Exchangeable Senior Debentures, or the 2026 Debentures, for a combination of cash (approximately $52.2 million) and 372,068 restricted shares of our parent company’s common stock at the request of holders pursuant to the terms of the indenture governing the 2026 Debentures. During the six months ended June 30, 2010, we entered into an agreement with an institutional holder of approximately $37.0 million principal amount of the 2026 Debentures to exchange such debentures held by such holder for a combination of cash (approximately $0.7 million including accrued interest) and 1,160,950 privately issued shares of our common stock. In addition, we exchanged $250,000 aggregate principal amount of the 2026 Debentures for approximately $0.4 million in cash and 682 restricted shares of our parent company’s common stock pursuant to the terms of the indenture governing the 2026 Debentures. We funded these exchanges with available cash and/or borrowings under our operating partnership’s revolving credit facility.

Future Uses of Cash

Our parent company may from time to time seek to retire, redeem or repurchase its preferred equity or the debt securities of our operating partnership through cash purchases and/or exchanges for equity securities in open market purchases, privately negotiated transactions or otherwise. Such repurchases, redemptions or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions or other factors. The amounts involved may be material.

We are also subject to the commitments discussed below under “Dividends and Distributions.”

Dividends and Distributions

Our parent company is required to distribute 90% of its taxable income (excluding capital gains) on an annual basis in order for it to continue to qualify as a REIT for federal income tax purposes. Accordingly, our parent company intends to make, but is not contractually bound to make, regular quarterly distributions to its preferred stockholders and common stockholders from cash flow from our operating partnership’s operating activities. All such distributions are at the discretion of our parent company’s board of directors. Our parent company considers market factors and our operating partnership’s performance in addition to REIT requirements in determining distribution levels. Our parent company has distributed 100% of its taxable income since inception to minimize corporate level federal income taxes. Amounts accumulated for distribution to stockholders are invested primarily in interest-bearing accounts and short-term interest-bearing securities, which are consistent with our intention to maintain our parent company’s status as a REIT. The exchange rate on the 2026 Debentures, the exchange rate on the 2029 Debentures, the conversion rate on our parent company’s series C cumulative convertible preferred stock and the conversion rate on our parent company’s series D cumulative convertible preferred stock are each subject to adjustment for certain events, including, but not limited to, certain dividends on our

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parent company’s common stock in excess of $0.265 per share per quarter, $0.33 per share per quarter, $0.28625 per share per quarter and $0.31 per share per quarter, respectively. Therefore, the declaration and payment of quarterly dividends by our parent company in excess of these thresholds may increase the dilutive impact of our operating partnership’s exchangeable debentures and our parent company’s convertible preferred stock on our parent company’s common stockholders.

While historically our parent company has satisfied this distribution requirement by making cash distributions to its stockholders, it may choose to satisfy this requirement by making distributions of cash or other property, including, in limited circumstances, our parent company’s own shares. As a result of this distribution requirement, our operating partnership cannot rely on retained earnings to fund its on-going operations to the same extent that other companies whose parent companies are not REITs can. Our parent company may need to continue to raise capital in the equity markets to fund our operating partnership’s working capital needs, as well as potential developments at new or existing properties, acquisitions or investments in existing or newly created joint ventures. In addition, our parent company may be required to use borrowings under our operating partnership’s revolving credit facility, if necessary, to meet REIT distribution requirements and maintain our parent company’s REIT status.

During the six months ended June 30, 2011, our parent company declared the following dividends (in thousands):

Date dividend declared	Dividend payable date		Series C Preferred Stock (1)		Series D Preferred Stock (2)		Common Stock  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	62,459
April 25, 2011		June 30, 2011	$	1,441	$	3,272	$	67,031
			$	3,273	$	7,962	$	129,490

(1) $1.094 annual rate of dividend per share.

(2) $1.375 annual rate of dividend per share.

(3) $2.720 annual rate of dividend per share.

Distributions out of our current or accumulated earnings and profits are generally classified as ordinary income whereas distributions in excess of our current and accumulated earnings and profits, to the extent of a stockholder’s U.S. federal income tax basis in our parent company’s stock, are generally classified as a return of capital. Distributions in excess of a stockholder’s U.S. federal income tax basis in our parent company’s stock are generally characterized as capital gain. Cash provided by operating activities has been sufficient to fund all distributions.

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Liquidity and Capital Resources of the Operating Partnership

In this “Liquidity and Capital Resources of the Operating Partnership” section, the terms “we,” “our” and “us” refer to our operating partnership together with its consolidated subsidiaries or our operating partnership and our parent company together with their consolidated subsidiaries, as the text requires.

Analysis of Liquidity and Capital Resources

Our parent company is our sole general partner and consolidates our results of operations for financial reporting purposes. Because we operate on a consolidated basis with our parent company, the section entitled “Liquidity and Capital Resources of the Parent Company” should be read in conjunction with this section to understand our liquidity and capital resources on a consolidated basis.

As of June 30, 2011, we had $27.9 million of cash and cash equivalents, excluding $56.9 million of restricted cash. Restricted cash primarily consists of interest-bearing cash deposits required by the terms of several of our mortgage loans for a variety of purposes, including real estate taxes, insurance, anticipated or contractually obligated tenant improvements, as well as capital expenditures.

Our short-term liquidity requirements primarily consist of operating expenses, redevelopment costs and other expenditures associated with our properties, distributions to our parent company in order for it to make dividend payments on its preferred stock, distributions to our parent company in order for it to make dividend payments to its stockholders required to maintain its REIT status, distributions to the unitholders in our operating partnership, capital expenditures, debt service on our loans and, potentially, acquisitions. We expect to meet our short-term liquidity requirements through net cash provided by operations, restricted cash accounts established for certain future payments and by drawing upon our revolving credit facility.

As of June 30, 2011, our revolving credit facility had a total capacity of $750.0 million. Our revolving credit facility matures on August 31, 2011, subject to a one-year extension option. The bank group is obligated to grant the extension option provided we give proper notice, we make certain representations and warranties and no default exists under the revolving credit facility. On July 8, 2011, we submitted notice of our intent to exercise such option to extend the maturity date of our revolving credit facility. Upon effectiveness of the extension, which is expected to occur in August 2011, our revolving credit facility will be scheduled to mature in August 2012. As of June 30, 2011, borrowings under the revolving credit facility bore interest at a blended rate of 1.39% (U.S), 2.50% (Euro) and 1.83% (GBP), which are based on 1-month LIBOR, 1-month EURIBOR and 1-month GBP LIBOR, respectively, plus a margin of 1.20%. The revolving credit facility has a $515.0 million sub-facility for multicurrency advances in British Pounds Sterling, Canadian Dollars, Euros, and Swiss Francs. We intend to use available borrowings under the revolving credit facility to, among other things, finance the acquisition of additional properties, fund tenant improvements and capital expenditures, fund development and redevelopment activities and to provide for working capital and other corporate purposes, including potentially for the repurchase, redemption or retirement of outstanding debt securities. As of June 30, 2011, approximately $341.4 million was drawn under this facility and $30.5 million of letters of credit were issued, leaving approximately $378.0 million available for use.

For a discussion of the potential impact of current global economic and market conditions on our liquidity and capital resources, see “—Factors Which May Influence Future Results of Operations—Global market and economic conditions” above.

On March 8, 2011, we closed the issuance of $400.0 million aggregate principal amount of the 2021 Notes. The purchase price paid by the initial purchasers was 99.775% of the principal amount thereof. The notes are our general unsecured senior obligations, rank equally in right of payment with all our other senior unsecured indebtedness and are fully and unconditionally guaranteed by our parent company. Interest on the notes is payable on March 15 and September 15 of each year, beginning on September 15, 2011. The net proceeds from the offering after deducting the original issue discount, underwriting commissions and estimated expenses was approximately $395.5 million. We used the net proceeds from the offering to temporarily repay borrowings under our revolving credit facility, to acquire additional properties, to fund development and redevelopment opportunities and for general working capital purposes, including potentially for the repurchase, redemption or retirement of outstanding debt securities.

On April 15, 2011, we completed the acquisition of a 38.8 acre development site located contiguous to our datacenter campus in Ashburn, Virginia. The purchase price was $17.3 million. We funded the acquisition with borrowings under our revolving credit facility.

In June 2011, our parent company completed its previous At-the-Market equity distribution program discussed under “Liquidity and Capital Resources of the Parent Company” above. For the three and six months ended June 30, 2011, our parent company generated net proceeds of approximately $171.2 million and $176.9 million, respectively, from the issuance of approximately 2.9 million and 3.0 million common shares, respectively, under the program at an average price of $60.58 and $60.51 per share, respectively, after payment of approximately $2.6 million and $2.7 million, respectively, of commissions to the sales agents. The proceeds from the issuances were contributed to us in exchange for the issuance of approximately 2.9 million and 3.0 million common units, respectively, to our parent company. For the three and six months ended June 30, 2010, our parent company generated net proceeds of approximately $12.7 million and $67.5 million, respectively, from the issuance of approximately 0.2 million and 1.3 million common shares, respectively, under the program at an average price of $58.38 and $51.87, respectively, per share after payment of approximately $0.2 million and $1.0 million, respectively, of commissions to the sales agents. The proceeds from the issuances were contributed to us in exchange for the issuance of approximately 0.2 million and 1.3 million common units, respectively, to our parent company.

On June 29, 2011, our parent company commenced its new At-the-Market equity distribution program discussed under “Liquidity and Capital Resources of the Parent Company” above. During the six months ended June 30, 2011, no sales were made under the new At-the-Market equity distribution program.

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On June 24, 2011, we acquired the noncontrolling ownership interest in the entity that owns Datacenter Park Dallas, from our joint venture partner for $53.2 million (subject to adjustment in limited circumstances), resulting in full ownership by us. The 7-building development property is located in Richardson, Texas and totals approximately 796,000 square feet. During the second quarter of 2011, in connection with the acquisition of the noncontrolling ownership interest in Datacenter Park Dallas, we also repaid in full secured debt on the property for approximately $16.2 million. During the second quarter of 2011, we also prepaid the secured debt on the 3 Corporate Place property in Piscataway, New Jersey totaling approximately $80.0 million and paid at maturity the secured debt on the 6 Braham Street property in London, England totaling approximately $20.3 million. We financed these activities with borrowings under our revolving credit facility.

During the six months ended June 30, 2011, we exchanged approximately $40.5 million aggregate principal amount of our 2026 Debentures for a combination of cash (approximately $52.2 million) and 372,068 restricted shares of Digital Realty Trust, Inc. common stock at the request of holders pursuant to the terms of the indenture governing our 2026 Debentures. During the six months ended June 30, 2010, we entered into an agreement with an institutional holder of approximately $37.0 million principal amount of our 2026 Debentures to exchange such debentures held by such holder for a combination of cash (approximately $0.7 million including accrued interest) and 1,160,950 privately issued shares of our common stock. In addition, we exchanged $250,000 aggregate principal amount of the 2026 Debentures for approximately $0.4 million in cash and 682 restricted shares of our parent company’s common stock pursuant to the terms of the indenture governing the 2026 Debentures. We funded these exchanges with available cash and/or borrowings under our revolving credit facility.

Construction

As of June 30, 2011 and December 31, 2010, work in progress, including the proportionate land and property costs related to current construction projects, amounted to $323.0 million, or $409.4 million including construction accruals and certain capitalized costs, and $202.0 million, or $274.8 million including construction accruals and certain capitalized costs, respectively. Separately, our redevelopment program included the proportionate land and building costs related to other targeted projects in the amount of $79.5 million and $184.0 million as of June 30, 2011 and December 31, 2010, respectively. Work in progress related to non-redevelopment projects, primarily tenant and building improvements, amounted to $3.9 million and $2.0 million as of June 30, 2011 and December 31, 2010, respectively.

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Future Uses of Cash

Our properties require periodic investments of capital for tenant-related capital expenditures and for general capital improvements. As of June 30, 2011, we had approximately 2.1 million square feet of redevelopment space and we also owned approximately 224,000 net rentable square feet of Turn-Key Datacenter^® space with extensive installed tenant improvements that we may subdivide during the next two years rather than lease to large single tenants. Turn-Key Datacenter^® space is move-in-ready space for the placement of computer and network equipment required to provide a datacenter environment. Depending on demand for additional Turn-Key Datacenter^® and Powered Base Building^® space, we expect to incur significant tenant improvement costs to develop and redevelop these types of spaces. At June 30, 2011, approximately 944,000 square feet of space was under construction for Turn-Key Datacenter^®, Powered Base Building^® and Build-to-Suit product, all of which will be income producing when complete, in seven U.S. domestic markets, two European markets, and Singapore consisting of approximately 382,000 square feet of development projects and 562,000 square feet of redevelopment projects. At June 30, 2011, we had commitments under construction contracts for approximately $119.2 million. We currently expect to incur approximately $250.0 million to $375.0 million of capital expenditures for our development and redevelopment programs during the six months ended December 31, 2011, although this amount may increase or decrease, potentially materially, based on numerous factors, including changes in demand, leasing results and availability of debt or equity capital.

Historical Capital Expenditures

	Six Months Ended
	June 30, 2011		June 30, 2010
Development projects	$	45,048	$	25,823
Redevelopment projects		203,518		82,773
Other capital expenditures		27,140		31,106
Total capital expenditures (excluding indirect costs)	$	275,706	$	139,702

For the six months ended June 30, 2011, total capital expenditures increased $136.0 million to $275.7 million from the six months ended June 30, 2010. Our development capital expenditures for the six months ended June 30, 2011 were approximately $45.0 million, which reflects an increase of approximately 74% from the same period in 2010. This increase was primarily due to increased spending for Powered Base Building^® product and base building improvements for our Turn-Key Datacenter^® product. Our development capital expenditures are generally funded by our available cash and equity and debt capital. We also spent approximately $203.5 million in the six months ended June 30, 2011 on redevelopment projects, which reflects an increase of approximately 146% compared to the same period in 2010. This increase was primarily due to a general increase in the level of construction activity in the U.S., Europe and Singapore. Our redevelopment capital expenditures are generally funded by our available cash and equity and debt capital. Other capital expenditures include capitalized replacement and other projects relating to the existing operating portfolio and decreased in the six months ended June 30, 2011 compared to the same period in 2010 primarily due to a general decrease in the level of activity related to these projects.

Indirect costs, including capitalized interest, capitalized in the six months ended June 30, 2011 and 2010 were $21.2 million and $13.3 million, respectively. Capitalized interest comprised approximately $8.9 million and $4.4 million, respectively, of the total indirect costs capitalized for the six months ended June 30, 2011 and 2010. The increase in capitalized interest in the six months ended June 30, 2011 compared to the same period in 2010 was primarily due to an increase in the amount of capital expenditures in the six months ended June 30, 2011 as compared to the six months ended June 30, 2010. Excluding capitalized interest, the increase in direct costs in the six months ended June 30, 2011 compared to the same period in 2010 was primarily due to capitalized amounts relating to compensation expense of employees directly engaged in construction and leasing activities. See “—Future Uses of Cash” for a discussion of the amount of capital expenditures we expect to incur during the year ending December 31, 2011.

We are also subject to the commitments discussed below under “Commitments and Contingencies,” “Off-Balance Sheet Arrangements” and “Distributions.”

Consistent with our growth strategy, we actively pursue opportunities for potential acquisitions, with due diligence and negotiations often at different stages at different times. The dollar value of additional acquisitions for the remainder of the year ending December 31, 2011 will be based on numerous factors, including tenant demand, leasing results, availability of debt or equity capital and acquisition opportunities.

We may from time to time seek to retire or repurchase our outstanding debt or the preferred equity of our parent company through cash purchases and/or exchanges for equity securities of our parent company in open market purchases, privately negotiated transactions or otherwise. Such repurchases or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions or other factors. The amounts involved may be material.

We expect to meet our short-and long-term liquidity requirements, including to pay for scheduled debt maturities and to fund property acquisitions and non-recurring capital improvements, with net cash from operations, future long-term secured and unsecured indebtedness and the issuance of equity and debt securities and the proceeds of equity issuances by our parent company. We also may fund future short-and long-term liquidity requirements, including property acquisitions and non-recurring capital improvements using

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our revolving credit facility pending permanent financing. If we are not able to obtain additional financing on terms attractive to us, or at all, including as a result of the circumstances described above under “Factors Which May Influence Future Results of Operations—Global market and economic conditions,” we may be required to reduce our acquisition or capital expenditure plans, which could have a material adverse effect upon our business and results of operations.

Distributions

All distributions on our units are at the discretion of our parent company’s board of directors. During the six months ended June 30, 2011, our operating partnership declared the following distributions (in thousands):

Date distribution declared	Distribution payable date		Series C Preferred Units (1)		Series D Preferred Units (2)		Common Units  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	66,252
April 25, 2011		June 30, 2011	$	1,441	$	3,272	$	70,577
			$	3,273	$	7,962	$	136,829

(1) $1.094 annual rate of distribution per unit.

(2) $1.375 annual rate of distribution per unit.

(3) $2.720 annual rate of distribution per unit.

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Commitments and Contingencies

We have agreed with the seller of 350 East Cermak Road to share a portion, not to exceed $135,000 per month, of rental revenue, adjusted for our costs to lease the premises, from the leases of the 192,000 square feet of space held for redevelopment. This revenue sharing agreement will terminate in May 2012. We made payments of approximately $0.8 million and $3.8 million to the seller during the six months ended June 30, 2011 and 2010, respectively. We have recorded approximately $1.5 million and $2.3 million for this contingent liability on our consolidated balance sheet at June 30, 2011 and December 31, 2010, respectively.

As part of the acquisition of Clonshaugh Industrial Estate I, we entered into an agreement with the seller whereby the seller is entitled to receive 40% of the net rental income generated by the existing building after we have received a 9% return on all capital invested in the property. As of February 6, 2006, the date we acquired this property, we have estimated the present value of these expected payments over the 10 year lease term to be approximately $1.1 million and this value has been recorded as a component of the purchase price. Accounts payable and other liabilities include $1.4 million and $1.3 million for this liability as of June 30, 2011 and December 31, 2010, respectively. We made payments of $0.1 million to the seller during each of the six months ended June 30, 2011 and 2010.

As part of the acquisition of 29A International Business Park, the seller could earn additional consideration based on future net operating income growth in excess of certain performance targets, as defined. As of June 30, 2011, construction is not complete and there have been no leases executed that would cause an amount to become probable of payment and therefore no amount is accrued as of June 30, 2011. The maximum amount that could be earned by the seller is S$50.0 million (or approximately $40.7 million based on the exchange rate as of June 30, 2011). The earnout contingency expires in November 2020.

As of June 30, 2011, we were a party to interest rate cap and swap agreements which hedge variability in cash flows related to LIBOR, GBP LIBOR and EURIBOR based mortgage loans. Under these swaps, we pay variable-rate amounts in exchange for fixed-rate payments over the life of the agreements without exchange of the underlying principal amounts. See Item 3 “Quantitative and Qualitative Disclosures about Market Risk.”

Outstanding Consolidated Indebtedness

The table below summarizes our debt, as of June 30, 2011 (in millions):

Debt Summary:
Fixed rate	$	2,458.6
Variable rate debt subject to interest rate swaps and caps		267.6
Total fixed rate debt (including interest rate swaps and caps)		2,726.2
Variable rate—unhedged		341.4
Total	$	3,067.6
Percent of Total Debt:
Fixed rate (including swapped debt)		88.9	%
Variable rate		11.1	%
Total		100.0	%
Effective Interest Rate as of June 30, 2011(1):
Fixed rate (including hedged variable rate debt)		5.58	%
Variable rate		1.54	%
Effective interest rate		5.13	%

(1) Excludes impact of deferred financing cost amortization.

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As of June 30, 2011, we had approximately $3.1 billion of outstanding consolidated long-term debt as set forth in the table above. Our ratio of debt to total enterprise value was approximately 31% (based on the closing price of our parent company’s common stock on June 30, 2011 of $61.78). For this purpose, our total enterprise value is defined as the sum of the market value of our parent company’s outstanding common stock (which may decrease, thereby increasing our debt to total enterprise value ratio), excluding options issued under our incentive award plan, plus the liquidation value of our parent company’s preferred stock, plus the aggregate value of our operating partnership units not held by our parent company (with the per unit value equal to the market value of one share of our parent company’s common stock and excluding long-term incentive units and Class C Units), plus the book value of our total consolidated indebtedness.

The variable rate debt shown above bears interest at interest rates based on various LIBOR, GBP LIBOR and EURIBOR rates ranging from one to twelve months, depending on the respective agreement governing the debt. Assuming maturity of the 2026 Debentures and the 2029 Debentures at their first redemption dates in August 2011 and April 2014, respectively, as of June 30, 2011, our debt had a weighted average term to initial maturity of approximately 4.8 years (approximately 4.9 years assuming exercise of extension options).

Off-Balance Sheet Arrangements

As of June 30, 2011, we were party to interest rate swap and cap agreements related to $267.6 million of outstanding principal on our variable rate debt. See Item 3 “Quantitative and Qualitative Disclosures about Market Risk.”

The 2026 Debentures provide for excess exchange value to be paid in cash and/or shares of Digital Realty Trust, Inc. common stock if the stock price exceeds a certain amount. If such debentures were exchanged in full on June 30, 2011, we would owe approximately $48.3 million to the holders of such debentures, payable in cash equal to the principal balance plus $48.0 million, equal to the excess exchange value, payable in cash and/or shares of Digital Realty Trust, Inc. common stock. See note 6 to our condensed consolidated financial statements for a further description of our 2026 Debentures.

Cash Flows

The following summary discussion of our cash flows is based on the consolidated statements of cash flows and is not meant to be an all-inclusive discussion of the changes in our cash flows for the periods presented below.

Comparison of Six Months Ended June 30, 2011 to Six Months Ended June 30, 2010

The following table shows cash flows and ending cash and cash equivalent balances for the six months ended June 30, 2011 and 2010, respectively (in thousands):

	Six Months Ended June 30,
	2011			2010			Change
Net cash provided by operating activities	$	189,723		$	143,072		$	46,651
Net cash used in investing activities		(331,021	)		(586,486	)		255,465
Net cash provided by financing activities		157,479			713,717			(556,238	)
Net increase in cash and cash equivalents	$	16,181		$	270,303		$	(254,122	)

The increase in net cash provided by operating activities was due to increased cash flows from new leasing at our same store properties, completed and leased redevelopment space and our acquisition of new operating properties which was partially offset by increased operating and interest expenses. Net cash used in investing activities decreased for the six months ended June 30, 2011, as we had a decrease in cash paid for acquisitions for the six months ended June 30, 2011 ($17.5 million) as compared to in the same period in 2010 ($406.0 million) partially offset by an increase in cash paid for capital expenditures for the six months ended June 30, 2011 ($307.9 million) as compared to the same period in 2010 ($153.7 million).

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Cash flows from financing activities for the company consisted of the following amounts (in thousands):

	Six Months Ended June 30,
	2011			2010			Change
Proceeds from borrowings, net of repayments	$	(114,254	)	$	(84,513	)	$	(29,741	)
Net proceeds from issuance of common stock, including exercise of stock options		179,319			448,323			(269,004	)
Net proceeds from 2020 Notes		—			486,601			(486,601	)
Net proceeds from 2021 Notes		395,815			—			395,815
Principal payments on 2026 Debentures		(40,457	)		(250	)		(40,207	)
Purchase of noncontrolling interests in consolidated joint venture		(53,240	)		—			(53,240	)
Dividend and distribution payments		(199,274	)		(141,791	)		(57,483	)
Other		(10,430	)		5,347			(15,777	)
Net cash provided by financing activities	$	157,479		$	713,717		$	(556,238	)

The decrease in net cash provided by financing activities was primarily due to the issuance of our 2021 Notes (net proceeds of $395.8 million) and common stock (net proceeds of $176.3 million) during the six months ended June 30, 2011 as compared to the issuance of our 2020 Notes (net proceeds of $486.6 million) and common stock (net proceeds of $444.7 million) during the six months ended June 30, 2010. The increase in dividend and distribution payments for the six months ended June 30, 2011 as compared to the same period in 2010 was a result of an increase in shares outstanding and dividend amount per share in 2011 as compared to 2010.

Cash flows from financing activities for the operating partnership consisted of the following amounts (in thousands).

	Six Months Ended June 30,
	2011			2010			Change
Proceeds from borrowings, net of repayments	$	(114,254	)	$	(84,513	)	$	(29,741	)
General partner contributions, net		179,319			448,323			(269,004	)
Net proceeds from 2020 Notes		—			486,601			(486,601	)
Net proceeds from 2021 Notes		395,815			—			395,815
Principal payments on 2026 Debentures		(40,457	)		(250	)		(40,207	)
Purchase of noncontrolling interests in consolidated joint venture		(53,240	)		—			(53,240	)
Distribution payments		(199,274	)		(141,791	)		(57,483	)
Other		(10,430	)		5,347			(15,777	)
Net cash provided by financing activities	$	157,479		$	713,717		$	(556,238	)

The decrease in net cash provided by financing activities was primarily due to the issuance of the 2021 Notes (net proceeds of $395.8 million) during the six months ended June 30, 2011 as compared to the issuance of the 2020 Notes (net proceeds of $486.6 million) during the six months ended June 30, 2010. General partner contributions were primarily related to the issuance of our operating partnership’s units to the company in connection with the company’s common stock offerings, including under the previous equity distribution program. The increase in distribution payments for the six months ended June 30, 2011 as compared to the same period in 2010 was a result of an increase in units outstanding and distribution amount per unit in 2011 as compared to 2010.

Noncontrolling Interests in Operating Partnership

Noncontrolling interests relate to the common units in our operating partnership that are not owned by Digital Realty Trust, Inc., which, as of June 30, 2011, amounted to 4.9% of our operating partnership common units. In conjunction with our formation, GI Partners received common units, in exchange for contributing ownership interests in properties to our operating partnership. Also, our operating partnership issued common units to third party sellers in connection with our acquisition of real estate interests from such third parties.

Limited partners who acquired common units in connection with our formation have the right to require our operating partnership to redeem part or all of their common units for cash based upon the fair market value of an equivalent number of shares of Digital Realty Trust, Inc. common stock at the time of the redemption. Alternatively, we may elect to acquire those common units in exchange for shares of Digital Realty Trust, Inc. common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to registration rights agreements we entered into with GI Partners and the other third party contributors, we filed a shelf registration statement covering the issuance of the shares of our common stock issuable upon redemption of the common units, and the resale of those shares of common stock by the holders. As of March 31, 2007, GI Partners no longer had an ownership interest in our operating partnership.

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Recently Issued Accounting Pronouncements

In June 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU “) 2011-05, “Comprehensive Income (Topic 220): Presentation of Comprehensive Income.” ASU 2011-05 eliminates the option to present components of other comprehensive income as part of the statement of shareholders’ equity and requires the presentation of components of net income and components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. This pronouncement is effective for us in the first quarter of 2012 and will not have a significant impact to our consolidated financial statements.

Inflation

Many of our leases provide for separate real estate tax and operating expense escalations. In addition, many of the leases provide for fixed base rent increases. We believe that inflationary increases may be at least partially offset by the contractual rent increases and expense escalations described above. See “Factors Which May Influence Future Results of Operations—Operating Expenses” for further discussion.

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Funds from Operations

We calculate Funds from Operations, or FFO, in accordance with the standards established by the National Association of Real Estate Investment Trusts, or NAREIT. FFO represents net income (loss) available to common stockholders and unitholders (computed in accordance with U.S. GAAP), excluding gains (or losses) from sales of property, real estate related depreciation and amortization (excluding amortization of deferred financing costs) and after adjustments for unconsolidated partnerships and joint ventures. Management uses FFO as a supplemental performance measure because, in excluding real estate related depreciation and amortization and gains and losses from property dispositions, it provides a performance measure that, when compared year over year, captures trends in occupancy rates, rental rates and operating costs. We also believe that, as a widely recognized measure of the performance of REITs, FFO will be used by investors as a basis to compare our operating performance with that of other REITs. However, because FFO excludes depreciation and amortization and captures neither the changes in the value of our properties that result from use or market conditions, nor the level of capital expenditures and leasing commissions necessary to maintain the operating performance of our properties, all of which have real economic effect and could materially impact our financial condition and results from operations, the utility of FFO as a measure of our performance is limited. Other REITs may not calculate FFO in accordance with the NAREIT definition and, accordingly, our FFO may not be comparable to such other REITs’ FFO. Accordingly, FFO should be considered only as a supplement to net income as a measure of our performance.

Reconciliation of Net Income Available to Common Stockholders to Funds From Operations (FFO)

(in thousands, except per share data)

	Three Months Ended						Six Months Ended
	June 30, 2011			June 30, 2010			June 30, 2011			June 30, 2010
Net income available to common stockholders	$	31,990		$	9,091		$	62,970		$	23,835
Adjustments:
Noncontrolling interests in operating partnership		1,582			560			3,234			1,533
Real estate related depreciation and amortization (1)		76,405			59,517			149,911			116,692
Real estate related depreciation and amortization related to investment in unconsolidated joint ventures		893			688			1,785			1,461
FFO available to common stockholders and unitholders (2)	$	110,870		$	69,856		$	217,900		$	143,521
Basic FFO per share and unit	$	1.10		$	0.81		$	2.21		$	1.69
Diluted FFO per share and unit (2)	$	1.02		$	0.76		$	2.03		$	1.57
Weighted average common stock and units outstanding
Basic		101,056			86,150			98,699			84,700
Diluted (2)		117,845			106,386			116,744			104,767
(1)    Real estate depreciation and amortization was computed as follows:
Depreciation and amortization per income statement		76,848			59,860			150,766			117,392
Non-real estate depreciation		(443	)		(343	)		(855	)		(700	)
	$	76,405		$	59,517		$	149,911		$	116,692

(2) At June 30, 2011, we had 5,271 series C convertible preferred shares and 9,518 series D convertible preferred shares outstanding that were convertible into 2,865 common shares and 6,419 common shares on a weighted average basis for the three months ended June 30, 2011, respectively. In addition, we had a balance of $266,400 of 5.50% exchangeable senior debentures that were exchangeable for 6,289 common shares on a weighted average basis for the three months ended June 30, 2011. See below for calculations of diluted FFO available to common stockholders and unitholders and weighted average common stock and units outstanding.

	Three Months Ended				Six Months Ended
	June 30, 2011		June 30, 2010		June 30, 2011		June 30, 2010
FFO available to common stockholders and unitholders	$	110,870	$	69,856	$	217,900	$	143,521
Add: Series C convertible preferred dividends		1,441		1,914		3,273		3,828
Add: Series D convertible preferred dividends		3,272		4,742		7,962		9,484
Add: 5.50% exchangeable senior debentures interest expense		4,050		4,050		8,100		8,100
FFO available to common stockholders and unitholders—diluted	$	119,633	$	80,562	$	237,235	$	164,933
Weighted average common stock and units outstanding		101,056		86,150		98,699		84,700
Add: Effect of dilutive securities (excluding series C and D convertible preferred stock and 5.50% exchangeable senior debentures)		1,216		2,146		1,138		1,988
Add: Effect of dilutive series C convertible preferred stock		2,865		3,657		3,256		3,657
Add: Effect of dilutive series D convertible preferred stock		6,419		8,238		7,371		8,227
Add: Effect of dilutive 5.50% exchangeable senior debentures		6,289		6,195		6,280		6,195
Weighted average common stock and units outstanding—diluted		117,845		106,386		116,744		104,767

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

Our future income, cash flows and fair values relevant to financial instruments depend upon prevalent market interest rates. Market risk refers to the risk of loss from adverse changes in market prices and interest rates. We do not use derivatives for trading or speculative purposes and only enter into contracts with major financial institutions based on their credit rating and other factors.

Analysis of Debt between Fixed and Variable Rate.

We use interest rate swap and cap agreements and fixed rate debt to reduce our exposure to interest rate movements. As of June 30, 2011, our consolidated debt was as follows (in millions):

	Carrying Value		Estimated Fair Value
Fixed rate debt	$	2,458.6	$	2,764.4
Variable rate debt subject to interest rate swaps and caps		267.6		269.1
Total fixed rate debt (including interest rate swaps and caps)		2,726.2		3,033.5
Variable rate debt		341.4		341.4
Total outstanding debt	$	3,067.6	$	3,374.9

Interest rate swaps included in this table and their fair values as of June 30, 2011 and December 31, 2010 were as follows (in thousands):

Notional Amount											Fair Value at Significant Other Observable Inputs (Level 2)
As of June 30, 2011			As of December 31, 2010			Type of Derivative	Strike Rate		Effective Date	Expiration Date	As of June 30, 2011			As of December 31, 2010
$	—		$	19,515	(1)	Swap		4.944	Jul. 10, 2006	Apr. 10, 2011	$	—		$	(231	)
	68,747	(1)		66,858	(1)	Swap		2.980	April 6, 2009	Nov. 30, 2013		(2,606	)		(2,471	)
	15,024	(2)		13,978	(2)	Swap		3.981	May 17, 2006	Jul. 18, 2013		(593	)		(828	)
	10,870	(2)		10,113	(2)	Swap		4.070	Jun. 23, 2006	Jul. 18, 2013		(448	)		(621	)
	9,566	(2)		8,900	(2)	Swap		3.989	Jul. 27, 2006	Oct. 18, 2013		(412	)		(557	)
	44,534	(2)		41,430	(2)	Swap		3.776	Dec. 5, 2006	Jan. 18, 2012		(516	)		(1,129	)
	38,289	(2)		35,620	(2)	Swap		4.000	Dec. 20, 2006	Jan. 18, 2012		(491	)		(1,054	)
	43,506	(2)		40,152	(2)	Swap		2.703	Dec. 3, 2009	Sep. 4, 2014		(630	)		(1,139	)
	16,576			16,976		Cap		4.000	June 24, 2009	June 25, 2012		—			3
	20,500			20,500		Cap		4.000	Aug. 4, 2010	June 15, 2013		4			30
$	267,612		$	274,042							$	(5,692	)	$	(7,997	)

(1) Translation to U.S. dollars is based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

(2) Translation to U.S. dollars is based on exchange rate of $1.45 to €1.00 as of June 30, 2011 and $1.34 to €1.00 as of December 31, 2010.

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Sensitivity to Changes in Interest Rates.

The following table shows the effect if assumed changes in interest rates occurred:

Assumed event	Interest rate change (basis points)			Change ($ millions)
Increase in fair value of interest rate swaps and caps following an assumed 10% increase in interest rates		14		$	0.6
Decrease in fair value of interest rate swaps and caps following an assumed 10% decrease in interest rates		(14	)		(0.6	)
Increase in annual interest expense on our debt that is variable rate and not subject to swapped or capped interest following a 10% increase in interest rates		14			0.5
Decrease in annual interest expense on our debt that is variable rate and not subject to swapped or capped interest following a 10% decrease in interest rates		(14	)		(0.5	)
Increase in fair value of fixed rate debt following a 10% decrease in interest rates		(14	)		16.3
Decrease in fair value of fixed rate debt following a 10% increase in interest rates		14			(15.2	)

Interest risk amounts were determined by considering the impact of hypothetical interest rates on our financial instruments. These analyses do not consider the effect of any change in overall economic activity that could occur in that environment. Further, in the event of a change of that magnitude, we may take actions to further mitigate our exposure to the change. However, due to the uncertainty of the specific actions that would be taken and their possible effects, these analyses assume no changes in our financial structure.

Foreign Currency Exchange Risk

For the six months ended June 30, 2011 and 2010, we had foreign operations in the United Kingdom, Ireland, France, The Netherlands, Switzerland, Singapore and Canada and, as such, are subject to risk from the effects of exchange rate movements of foreign currencies, which may affect future costs and cash flows. Our foreign operations are conducted in the British Pound, Euro, Swiss Franc and the Singapore Dollar, except for our Canadian property for which the functional currency is the U.S. dollar. Our primary currency exposures are to the Euro and the British Pound. We attempt to mitigate a portion of the risk of currency fluctuation by financing our properties in the local currency denominations, although there can be no assurance that this will be effective. As a result, changes in the relation of any such foreign currency to U.S. dollars may affect our revenues, operating margins and distributions and may also affect the book value of our assets and the amount of stockholders’ equity. For the three months ended June 30, 2011 and 2010, operating revenues from properties outside the United States contributed $27.5 million and $22.4 million, respectively, which represented 10.3% and 11.3% of our operating revenues, respectively, and for the six months ended June 30, 2011 and 2010, operating revenues from properties outside the United States contributed $53.2 million and $45.5 million, respectively, which represented 10.3% and 11.7% of our operating revenues, respectively.

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ITEM 4. CONTROLS AND PROCEDURES.

Evaluation of Disclosure Controls and Procedures (Digital Realty Trust, Inc.)

The company maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in its reports filed under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the U.S. Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to its management, including its chief executive officer and chief financial officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, the company’s management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and its management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Also, the company has investments in certain unconsolidated entities, which are accounted for using the equity method of accounting. As the company does not control or manage these entities, its disclosure controls and procedures with respect to such entities may be substantially more limited than those it maintains with respect to its consolidated subsidiaries.

As required by Rule 13a-15(b) or Rule 15d-15(b) of the Securities Exchange Act of 1934, as amended, management of the company carried out an evaluation, under the supervision and with participation of its chief executive officer and chief financial officer, of the effectiveness of the design and operation of its disclosure controls and procedures that were in effect as of the end of the quarter covered by this report. Based on the foregoing, the company’s chief executive officer and chief financial officer each concluded that its disclosure controls and procedures were effective at the reasonable assurance level.

There have been no changes in the company’s internal control over financial reporting during its most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

Evaluation of Disclosure Controls and Procedures (Digital Realty Trust, L.P.)

The operating partnership maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in its reports filed under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the U.S. Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to its management, including the chief executive officer and chief financial officer of its general partner, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, the operating partnership’s management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and its management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Also, the operating partnership has investments in certain unconsolidated entities, which are accounted for using the equity method of accounting. As the operating partnership does not control or manage these entities, its disclosure controls and procedures with respect to such entities may be substantially more limited than those it maintains with respect to its consolidated subsidiaries.

As required by Rule 13a-15(b) or Rule 15d-15(b) of the Securities Exchange Act of 1934, as amended, management of the operating partnership carried out an evaluation, under the supervision and with participation of the chief executive officer and chief financial officer of its general partner, of the effectiveness of the design and operation of its disclosure controls and procedures that were in effect as of the end of the quarter covered by this report. Based on the foregoing, the chief executive officer and chief financial officer of the operating partnership’s general partner each concluded that its disclosure controls and procedures were effective at the reasonable assurance level.

There have been no changes in the operating partnership’s internal control over financial reporting during its most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

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PART II—OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS.

None.

ITEM 1A. RISK FACTORS.

The risk factors discussed under the heading “Risk Factors” and elsewhere in the company’s and the operating partnership’s Annual Report on Form 10-K for the year ended December  31, 2010, and any amendments thereto, continue to apply to our business.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS.

Digital Realty Trust, Inc.

During the three months ended June 30, 2011, Digital Realty Trust, Inc. issued 68,995 restricted shares of its common stock and our operating partnership paid approximately $4.6 million in cash to holders of our operating partnership’s 2026 Debentures in exchange for approximately $4.6 million in aggregate principal amount of our operating partnership’s 2026 Debentures at the request of holders pursuant to the terms of the indenture governing the 2026 Debentures.

The shares were issued in transactions exempt from registration pursuant to Section 4(2) of the Securities Act of 1933, as amended, and Rule 506 of Regulation D promulgated thereunder. The issuance of the shares did not involve a public offering and was made without general solicitation or advertising. Each holder represented that, among other things, it is a “qualified institutional buyer” within the meaning of Rule 144A under the Securities Act of 1933, as amended.

Digital Realty Trust, L.P.

During the three months ended June 30, 2011, Digital Realty Trust, Inc. contributed an aggregate of 68,995 restricted shares of its common stock to our operating partnership, and our operating partnership delivered the shares and approximately $4.6 million in cash in exchange for approximately $4.6 million in aggregate principal amount of its 2026 Debentures at the request of holders pursuant to the terms of the indenture governing the 2026 Debentures. Digital Realty Trust, Inc. contributed the shares to our operating partnership in exchange for an aggregate of 68,995 common units.

For the issuance of common units to Digital Realty Trust, Inc., our operating partnership relied on Digital Realty Trust, Inc.’s status as a publicly traded NYSE-listed company with over $5 billion in total consolidated assets and as our operating partnership’s majority owner and general partner as the basis for the exemption under Section 4(2) of the Securities Act.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES.

None.

ITEM 4. (REMOVED AND RESERVED).

ITEM 5. OTHER INFORMATION.

None.

79

ITEM 6. EXHIBITS.

Exhibit Number	Description
3.1	Articles of Amendment and Restatement of Digital Realty Trust, Inc., as amended (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, Inc.’s Annual Report on Form 10-K filed on February 26, 2010).
3.2	Second Amended and Restated Bylaws of Digital Realty Trust, Inc. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on March 19, 2009).
3.3	Certificate of Limited Partnership of Digital Realty Trust, L.P. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, L.P.’s General Form for Registration of Securities on Form 10 (File No. 000-54023) filed on June 25, 2010).
3.4	Eighth Amended and Restated Agreement of Limited Partnership of Digital Realty Trust, L.P. (incorporated by reference to Exhibit 10.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on April 13, 2009).
10.1†	Second Amendment to Employment Agreement, dated June 7, 2011, among Digital Realty Trust, Inc., DLR, LLC and Richard A. Magnuson.
12.1	Statement of Computation of Ratios.
31.1	Rule 13a-14(a)/15d-14(a) Certifications of Chief Executive Officer for Digital Realty Trust, Inc.

80

Exhibit Number	Description
31.2	Rule 13a-14(a)/15d-14(a) Certifications of Chief Financial Officer for Digital Realty Trust, Inc.
31.3	Rule 13a-14(a)/15d-14(a) Certifications of Chief Executive Officer for Digital Realty Trust, L.P.
31.4	Rule 13a-14(a)/15d-14(a) Certifications of Chief Financial Officer for Digital Realty Trust, L.P.
32.1	18 U.S.C. § 1350 Certifications of Chief Executive Officer for Digital Realty Trust, Inc.
32.2	18 U.S.C. § 1350 Certifications of Chief Financial Officer for Digital Realty Trust, Inc.
32.3	18 U.S.C. § 1350 Certifications of Chief Executive Officer for Digital Realty Trust, L.P.
32.4	18 U.S.C. § 1350 Certifications of Chief Financial Officer for Digital Realty Trust, L.P.
101**	The following financial statements from Digital Realty Trust, Inc.’s and Digital Realty Trust, L.P.’s Form 10-Q for the quarter ended June 30, 2011, formatted in XBRL interactive data files: (i) Condensed Consolidated Balance Sheets as of June 30, 2011 and December 31, 2010; (ii) Condensed Consolidated Income Statements for the three and six months ended June 30, 2011 and 2010; (iii) Condensed Consolidated Statement of Equity/Statement of Capital for the six months ended June 30, 2011; (iv) Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2011 and 2010; (v) Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2011 and 2010; and (vi) Notes to Condensed Consolidated Financial Statements.

† Management contract or compensatory plan or arrangement.

** Pursuant to Rule 406T of Regulation S-T, these interactive data files are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Exchange Act of 1934, as amended, and otherwise are not subject to liability under these sections.

81

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	DIGITAL REALTY TRUST, INC.
August 5, 2011	/S/    MICHAEL F. FOUST
	Michael F. Foust Chief Executive Officer (principal executive officer)
August 5, 2011	/S/    A. WILLIAM STEIN
	A. William Stein Chief Financial Officer and Chief Investment Officer (principal financial officer)
August 5, 2011	/S/    EDWARD F. SHAM
	Edward F. Sham Sr. Vice President and Controller (principal accounting officer)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	DIGITAL REALTY TRUST, L.P.
	By:	Digital Realty Trust, Inc. Its general partner
	By:
August 5, 2011	/S/    MICHAEL F. FOUST
	Michael F. Foust Chief Executive Officer (principal executive officer)
August 5, 2011	/S/    A. WILLIAM STEIN
	A. William Stein Chief Financial Officer and Chief Investment Officer (principal financial officer)
August 5, 2011	/S/    EDWARD F. SHAM
	Edward F. Sham Sr. Vice President and Controller (principal accounting officer)

82

Exhibit Index

Exhibit Number	Description
3.1	Articles of Amendment and Restatement of Digital Realty Trust, Inc., as amended (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, Inc.’s Annual Report on Form 10-K filed on February 26, 2010).
3.2	Second Amended and Restated Bylaws of Digital Realty Trust, Inc. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on March 19, 2009).
3.3	Certificate of Limited Partnership of Digital Realty Trust, L.P. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, L.P.’s General Form for Registration of Securities on Form 10 (File No. 000-54023) filed on June 25, 2010).
3.4	Eighth Amended and Restated Agreement of Limited Partnership of Digital Realty Trust, L.P. (incorporated by reference to Exhibit 10.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on April 13, 2009).
10.1†	Second Amendment to Employment Agreement, dated June 7, 2011, among Digital Realty Trust, Inc., DLR, LLC and Richard A. Magnuson.
12.1	Statement of Computation of Ratios.
31.1	Rule 13a-14(a)/15d-14(a) Certifications of Chief Executive Officer for Digital Realty Trust, Inc.

83

Exhibit Number	Description
31.2	Rule 13a-14(a)/15d-14(a) Certifications of Chief Financial Officer for Digital Realty Trust, Inc.
31.3	Rule 13a-14(a)/15d-14(a) Certifications of Chief Executive Officer for Digital Realty Trust, L.P.
31.4	Rule 13a-14(a)/15d-14(a) Certifications of Chief Financial Officer for Digital Realty Trust, L.P.
32.1	18 U.S.C. § 1350 Certifications of Chief Executive Officer for Digital Realty Trust, Inc.
32.2	18 U.S.C. § 1350 Certifications of Chief Financial Officer for Digital Realty Trust, Inc.
32.3	18 U.S.C. § 1350 Certifications of Chief Executive Officer for Digital Realty Trust, L.P.
32.4	18 U.S.C. § 1350 Certifications of Chief Financial Officer for Digital Realty Trust, L.P.
101**	The following financial statements from Digital Realty Trust, Inc.’s and Digital Realty Trust, L.P.’s Form 10-Q for the quarter ended June 30, 2011, formatted in XBRL interactive data files: (i) Condensed Consolidated Balance Sheets as of June 30, 2011 and December 31, 2010; (ii) Condensed Consolidated Income Statements for the three and six months ended June 30, 2011 and 2010; (iii) Condensed Consolidated Statement of Equity/Statement of Capital for the six months ended June 30, 2011; (iv) Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2011 and 2010; (v) Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2011 and 2010; and (vi) Notes to Condensed Consolidated Financial Statements.

† Management contract or compensatory plan or arrangement.

** Pursuant to Rule 406T of Regulation S-T, these interactive data files are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Exchange Act of 1934, as amended, and otherwise are not subject to liability under these sections.

84

EX-10.1

Exhibit 10.1

SECOND AMENDMENT TO

EMPLOYMENT AGREEMENT

THIS SECOND AMENDMENT TO EMPLOYMENT AGREEMENT (this “Amendment”), is made as of June 7, 2011, by and between Digital Realty Trust, Inc. (the “REIT”) and DLR, LLC (the “Employer”, and together with the REIT, the “Company”) and Richard A. Magnuson (the “Employee”). Capitalized terms used and not otherwise defined herein shall have the meanings ascribed to such terms in the Employment Agreement (as defined below).

WHEREAS, the Company and the Employee are party to that certain Employment Agreement, dated August 7, 2008, as amended by the First Amendment thereto, dated as of December 24, 2008 (the “Employee Agreement”); and

WHEREAS, the Company, and the Employee desire to amend the Employment Agreement as set forth herein.

NOW THEREFORE, for good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the parties hereto hereby amend the Employment Agreement as follows:

1. The second sentence of Section 1 of the Employment Agreement is hereby modified, amended and restated in its entirety to read as follows:

“If not previously terminated, the Term shall automatically be extended for one additional year on the Initial Termination Date, and on each subsequent anniversary of the Initial Termination Date, unless the Company elects not to so extend the Term by notifying you, in writing, of such election not less than thirty (30) days prior to the last day of the then current Term.”

2. This Amendment shall be and is hereby incorporated in and forms a part of the Employment Agreement.

3. All other terms and provisions of the Employment Agreement shall remain unchanged except as specifically modified herein.

[Signature Page Follows]

IN WITNESS WHEREOF, the parties hereto have executed this Amendment as of the date first above written.

DIGITAL REALTY TRUST, INC.,
By:	/s/ Joshua A. Mills
Name:	Joshua A. Mills
Title:	General Counsel

DLR, LLC,
By:	Digital Realty Trust, Inc.,
Its:	General Partner
By:	/s/ Joshua A. Mills
Name:	Joshua A. Mills
Title:	General Counsel

EMPLOYEE

/s/ Richard A. Magnuson

Richard A. Magnuson

2

EX-12.1

Exhibit 12.1

Digital Realty Trust, Inc. and Subsidiaries

Statement of Computation of Ratios (1)

(in thousands, except ratios)

	Six Months Ended June 30,				Year Ended December 31,
	2011		2010		2010		2009			2008			2007			2006
Income from continuing operations before noncontrolling interests	$	77,240	$	45,488	$	105,412	$	91,234		$	67,918		$	22,546		$	24,890
Interest expense		75,416		64,064		137,384		88,442			63,621			67,054			50,598
Interest within rental expense		1,403		1,263		2,604		2,633			2,619			1,971			680
Noncontrolling interests in consolidated joint ventures		199		82		288		(140	)		(335	)		—			—
Earnings available to cover fixed charges	$	154,258	$	110,897	$	245,688	$	182,169		$	133,823		$	91,571		$	76,168
Fixed charges:
Interest expense		75,416		64,064	$	137,384	$	88,442		$	63,621		$	67,054		$	50,598
Interest within rental expense (2)		1,403		1,263		2,604		2,633			2,619			1,971			680
Capitalized interest		8,888		4,418		10,241		9,196			18,351			12,264			4,028
		85,707		69,745		150,229		100,271			84,591			81,289			55,306
Preferred stock dividends		11,235		20,202		37,004		40,404			38,564			19,330			13,780
Fixed charges and preferred stock dividends	$	96,942	$	89,947	$	187,233	$	140,675		$	123,155		$	100,619		$	69,086
Ratio of earnings to fixed charges		1.80		1.59		1.64		1.82			1.58			1.13			1.38
Ratio of earnings to fixed charges and preferred stock dividends		1.59		1.23		1.31		1.29			1.09			—	(3)		1.10

(1) All numbers presented in this exhibit exclude 7979 East Tufts Avenue (sold in July 2006), 100 Technology Center Drive (sold in March 2007) and 4055 Valley View Lane (sold in March 2007).

(2) Interest within rental expense represents one-third of rental expense (the approximate portion of rental expense representing interest).

(3) For the year ended December 31, 2007, earnings were insufficient to cover fixed charges and preferred dividends by $9,048.

Digital Realty Trust, L.P. and Subsidiaries

Statement of Computation of Ratios (1)

(in thousands, except ratios)

	Six Months Ended June 30,				Year Ended December 31,
	2011		2010		2010		2009			2008			2007			2006
Income from continuing operations before noncontrolling interests	$	77,240	$	45,488	$	105,412	$	91,234		$	67,918		$	22,546		$	24,890
Interest expense		75,416		64,064		137,384		88,442			63,621			67,054			50,598
Interest within rental expense		1,403		1,263		2,604		2,633			2,619			1,971			680
Noncontrolling interests in consolidated joint ventures		199		82		288		(140	)		(335	)		—			—
Earnings available to cover fixed charges	$	154,258	$	110,897	$	245,688	$	182,169		$	133,823		$	91,571		$	76,168
Fixed charges:
Interest expense		75,416		64,064	$	137,384	$	88,442		$	63,621		$	67,054		$	50,598
Interest within rental expense (2)		1,403		1,263		2,604		2,633			2,619			1,971			680
Capitalized interest		8,888		4,418		10,241		9,196			18,351			12,264			4,028
		85,707		69,745		150,229		100,271			84,591			81,289			55,306
Preferred unit distributions		11,235		20,202		37,004		40,404			38,564			19,330			13,780
Fixed charges and preferred unit distributions	$	96,942	$	89,947	$	187,233	$	140,675		$	123,155		$	100,619		$	69,086
Ratio of earnings to fixed charges		1.80		1.59		1.64		1.82			1.58			1.13			1.38
Ratio of earnings to fixed charges and preferred unit distributions		1.59		1.23		1.31		1.29			1.09			—	(3)		1.10

(1) All numbers presented in this exhibit exclude 7979 East Tufts Avenue (sold in July 2006), 100 Technology Center Drive (sold in March 2007) and 4055 Valley View Lane (sold in March 2007).

(2) Interest within rental expense represents one-third of rental expense (the approximate portion of rental expense representing interest).

(3) For the year ended December 31, 2007, earnings were insufficient to cover fixed charges and preferred distributions by $9,048.

EX-31.1

Exhibit 31.1

Certification of Principal Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Michael F. Foust, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: August 5, 2011

By:	/s/    MICHAEL F. FOUST
	Michael F. Foust
	Chief Executive Officer (Principal Executive Officer)

EX-31.2

Exhibit 31.2

Certification of Principal Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, A. William Stein, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: August 5, 2011

By:	/s/    A. WILLIAM STEIN
	A. William Stein
	Chief Financial Officer and Chief Investment Officer (Principal Financial Officer)

EX-31.3

Exhibit 31.3

Certification of Principal Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Michael F. Foust, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, L.P.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: August 5, 2011

By:	/s/    MICHAEL F. FOUST
	Michael F. Foust
	Chief Executive Officer (Principal Executive Officer) Digital Realty Trust, Inc., sole general partner of Digital Realty Trust, L.P.

EX-31.4

Exhibit 31.4

Certification of Principal Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, A. William Stein, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, L.P.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: August 5, 2011

By:	/s/    A. WILLIAM STEIN
	A. William Stein
	Chief Financial Officer and Chief Investment Officer (Principal Financial Officer) Digital Realty Trust, Inc., sole general partner of Digital Realty Trust, L.P.

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, Inc. (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended June 30, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company at the dates and for the periods indicated.

Dated: August 5, 2011

/s/    MICHAEL F. FOUST        

Michael F. Foust

Chief Executive Officer

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Company filed under the Securities Act of 1933, as amended.

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, Inc. (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended June 30, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company at the dates and for the periods indicated.

Dated: August 5, 2011

/s/    A. WILLIAM STEIN        

A. William Stein

Chief Financial Officer

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Company filed under the Securities Act of 1933, as amended.

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.3

Exhibit 32.3

Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, L.P. (the “Operating Partnership”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Operating Partnership for the quarterly period ended June 30, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership at the dates and for the periods indicated.

Dated: August 5, 2011

/s/    MICHAEL F. FOUST        

Michael F. Foust

Chief Executive Officer

Digital Realty Trust, Inc., sole general partner of

Digital Realty Trust, L.P.

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Operating Partnership for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Operating Partnership filed under the Securities Act of 1933, as amended.

A signed original of this written statement required by Section 906 has been provided to the Operating Partnership and will be retained by the Operating Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.4

Exhibit 32.4

Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, L.P. (the “Operating Partnership”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Operating Partnership for the quarterly period ended June 30, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership at the dates and for the periods indicated.

Dated: August 5, 2011

/s/    A. WILLIAM STEIN        

A. William Stein

Chief Financial Officer

Digital Realty Trust, Inc., sole general partner of

Digital Realty Trust, L.P.

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Operating Partnership for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Operating Partnership filed under the Securities Act of 1933, as amended.

A signed original of this written statement required by Section 906 has been provided to the Operating Partnership and will be retained by the Operating Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

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Debt of the Operating Partnership (Exchangeable Senior Debentures) (Details) (USD $) In Thousands, unless otherwise specified					6 Months Ended			6 Months Ended			12 Months Ended					12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2011 Exchangeable Senior Debentures [Member]	Dec. 31, 2010 Exchangeable Senior Debentures [Member]	Jun. 30, 2011 Exchangeable Senior Debentures [Member] 4.125% Exchangeable Senior Debentures due 2026 [Member]		Dec. 31, 2010 Exchangeable Senior Debentures [Member] 4.125% Exchangeable Senior Debentures due 2026 [Member]	Jun. 30, 2011 Exchangeable Senior Debentures [Member] 5.50% Exchangeable Senior Debentures due 2029 [Member]		Dec. 31, 2010 Exchangeable Senior Debentures [Member] 5.50% Exchangeable Senior Debentures due 2029 [Member]	Dec. 31, 2010 4.125% Exchangeable Senior Debentures due 2026 [Member]	Aug. 15, 2021 4.125% Exchangeable Senior Debentures due 2026 [Member]	Aug. 16, 2016 4.125% Exchangeable Senior Debentures due 2026 [Member]	Aug. 15, 2011 4.125% Exchangeable Senior Debentures due 2026 [Member]	Jun. 30, 2011 4.125% Exchangeable Senior Debentures due 2026 [Member]	Dec. 31, 2010 5.50% Exchangeable Senior Debentures due 2029 [Member]	Apr. 15, 2024 5.50% Exchangeable Senior Debentures due 2029 [Member]	Apr. 15, 2019 5.50% Exchangeable Senior Debentures due 2029 [Member]	Apr. 15, 2014 5.50% Exchangeable Senior Debentures due 2029 [Member]	Jun. 30, 2011 5.50% Exchangeable Senior Debentures due 2029 [Member]
Interest Rate at June 30, 2011					4.125%			5.50%												5.50%
Maturity Date					Aug. 15, 2026	[1]		Apr. 15, 2029	[2]
Unamortized discounts	$ (9,526)		$ (113)	$ (1,456)							$ (1,456)				$ (113)
Exchangeable senior debentures, net of discount	$ 314,588	$ 353,702	$ 314,588	$ 353,702	$ 48,301		$ 88,758	$ 266,400		$ 266,400
Purchase price/Redemption price percentage of debenture principal											100					100
Dates which the holders of may require the Operating Partnership to repurchase the debentures												August 15, 2021	August 15, 2016	August 15, 2011			April 15, 2024	April 15, 2019	April 15, 2014
Earliest date which The Company may repurchase debentures					August 18, 2011			April 18, 2014

[1] The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of August 15, 2011, August 15, 2016 and August 15, 2021. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on August 18, 2011.

[2] The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of April 15, 2014, April 15, 2019 and April 15, 2024. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on April 18, 2014.

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2011	Dec. 31, 2010
Accounts and other receivables, allowance for doubtful accounts	$ 1,955	$ 3,250
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, authorized	30,000,000	30,000,000
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, authorized	145,000,000	145,000,000
Common Stock, shares issued	98,754,727	91,159,221
Common Stock, shares outstanding	98,754,727	91,159,221
Digital Realty Trust, L.P. [Member]
Accounts and other receivables, allowance for doubtful accounts	1,955	3,250
Common Units, issued	98,754,727	91,159,221
Common Units, outstanding	98,754,727	91,159,221
Limited Partners, common units	3,430,814	3,937,827
Limited Partners, profits interest units	1,092,184	982,618
Limited Partners, Class C units outstanding	511,848	543,004
Digital Realty Trust, L.P. [Member] | Series C Cumulative Convertible Preferred Units [Member]
Preferred Stock, liquidation preference	369,715	519,681
Preferred Stock, liquidation preference per share/unit	$ 25	$ 25
Preferred Units, issued	5,270,980	6,999,955
Preferred Units, outstanding	5,270,980	6,999,955
Digital Realty Trust, L.P. [Member] | Series D Cumulative Convertible Preferred Units [Member]
Preferred Stock, liquidation preference	369,715	519,681
Preferred Stock, liquidation preference per share/unit	$ 25	$ 25
Preferred Units, issued	9,517,580	13,787,300
Preferred Units, outstanding	9,517,580	13,787,300
Series C Preferred Stock [Member]
Preferred Stock, dividend rate	4.375%	4.375%
Preferred Stock, liquidation preference	131,775	174,999
Preferred Stock, liquidation preference per share/unit	$ 25.00	$ 25.00
Preferred Stock, issued	5,270,980	6,999,955
Preferred Stock, outstanding	5,270,980	6,999,955
Series D Preferred Stock [Member]
Preferred Stock, dividend rate	5.50%	5.50%
Preferred Stock, liquidation preference	$ 237,940	$ 344,683
Preferred Stock, liquidation preference per share/unit	$ 25.00	$ 25.00
Preferred Stock, issued	9,517,580	13,787,300
Preferred Stock, outstanding	9,517,580	13,787,300

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Condensed Consolidated Income Statements (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Operating Revenues:
Rental	$ 202,806	$ 156,831	$ 399,601	$ 308,138
Tenant reimbursements	51,311	39,597	103,145	78,655
Construction management	13,759	1,036	15,576	2,450
Other	5		300
Total operating revenues	267,881	197,464	518,622	389,243
Operating Expenses:
Rental property operating and maintenance	72,337	53,935	144,060	106,530
Property taxes	13,962	12,748	27,433	25,469
Insurance	1,998	1,846	4,049	3,581
Construction management	11,199	471	12,936	1,118
Depreciation and amortization	76,848	59,860	150,766	117,392
General and administrative	14,077	12,574	26,482	23,093
Transactions	740	1,715	1,421	2,548
Other		165	90	167
Total operating expenses	191,161	143,314	367,237	279,898
Operating income	76,720	54,150	151,385	109,345
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	1,058	955	2,266	2,933
Interest and other income	380	34	644	65
Interest expense	(39,334)	(33,162)	(75,416)	(64,064)
Tax expense	(233)	(534)	(661)	(1,250)
Loss from early extinguishment of debt	(363)	(1,541)	(978)	(1,541)
Net income	38,228	19,902	77,240	45,488
Net income attributable to noncontrolling interests	(1,525)	(710)	(3,035)	(1,451)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P	36,703	19,192	74,205	44,037
Preferred stock dividends/Preferred units distribution	(4,713)	(10,101)	(11,235)	(20,202)
Net income available to common stockholders/unitholders	31,990	9,091	62,970	23,835
Net income per share available to common stockholders/unitholders
Basic	$ 0.33	$ 0.11	$ 0.67	$ 0.30
Diluted	$ 0.33	$ 0.11	$ 0.66	$ 0.29
Weighted average common shares/units outstanding:
Basic	96,295,585	80,542,329	93,875,415	79,164,167
Diluted	97,511,811	83,021,817	95,012,965	81,450,636
Digital Realty Trust, L.P. [Member]
Operating Revenues:
Rental	202,806	156,831	399,601	308,138
Tenant reimbursements	51,311	39,597	103,145	78,655
Construction management	13,759	1,036	15,576	2,450
Other	5		300
Total operating revenues	267,881	197,464	518,622	389,243
Operating Expenses:
Rental property operating and maintenance	72,337	53,935	144,060	106,530
Property taxes	13,962	12,748	27,433	25,469
Insurance	1,998	1,846	4,049	3,581
Construction management	11,199	471	12,936	1,118
Depreciation and amortization	76,848	59,860	150,766	117,392
General and administrative	14,077	12,574	26,482	23,093
Transactions	740	1,715	1,421	2,548
Other		165	90	167
Total operating expenses	191,161	143,314	367,237	279,898
Operating income	76,720	54,150	151,385	109,345
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	1,058	955	2,266	2,933
Interest and other income	380	34	644	65
Interest expense	(39,334)	(33,162)	(75,416)	(64,064)
Tax expense	(233)	(534)	(661)	(1,250)
Loss from early extinguishment of debt	(363)	(1,541)	(978)	(1,541)
Net income	38,228	19,902	77,240	45,488
Net loss (income) attributable to noncontrolling interests in consolidated joint ventures	57	(150)	199	82
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P	38,285	19,752	77,439	45,570
Preferred stock dividends/Preferred units distribution	(4,713)	(10,101)	(11,235)	(20,202)
Net income available to common stockholders/unitholders	$ 33,572	$ 9,651	$ 66,204	$ 25,368
Net income per share available to common stockholders/unitholders
Basic	$ 0.33	$ 0.11	$ 0.67	$ 0.30
Diluted	$ 0.33	$ 0.11	$ 0.66	$ 0.29
Weighted average common shares/units outstanding:
Basic	101,056,387	86,149,647	98,698,968	84,699,431
Diluted	102,272,613	88,629,135	99,836,518	86,985,900

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Incentive Plan (Long Term Incentive Units) (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Long-term incentive units granted			183,505
Service conditions of the awards			The service conditions of the awards provide for 20% vesting on each of the first and second anniversaries of the grant date and 30% vesting on each of the third and fourth anniversaries of the grant date
Minimum [Member] | Long Term Incentive Units [Member]
Long-term incentive units vesting period (years)			4
Service and Performance Condition [Member] | Long Term Incentive Units [Member]
Long-term incentive units granted			98,632	107,993
Long Term Incentive Units [Member]
Long-term incentive units granted			84,873	92,368
Long-term incentive units vesting period			four
Long-term incentive units expense	$ 2.5	$ 2.2	$ 4.4	$ 3.4
Capitalized expense related to construction and leasing activities	0.2	0.2	0.4	0.5
Unearned compensation due to the unvested portion of restricted stock			$ 18.2		$ 12.9
Period of recognition of unearned compensation (years)			2.8

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Debt of the Operating Partnership (Other Secured Loans) (Details) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011		Dec. 31, 2010
Other secured loan	$ 10,500		$ 10,500
Total indebtedness	3,067,577		2,806,954
Other Secured Loans [Member]
Other secured loan	10,500		10,500
Other Secured Loans [Member] | 800 Central Expressway Mezzanine [Member]
Variable Rate Basis	1-month LIBOR + 8.50%
Maturity Date	Jun. 09, 2013	[1]
Other secured loan	$ 10,500	[1]	$ 10,500	[1]

[1] The respective borrower's assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person.

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Related Party Transactions

6 Months Ended

Jun. 30, 2011

Related Party Transactions

Related Party Transactions

15. Related Party Transactions

In December 2006, we entered into ten leases with tel(x), pursuant to which tel(x) provides enhanced meet-me-room services to our customers. The initial terms of these leases expire in 2026, and tel(x) has options to extend them through 2046. tel(x) was acquired by GI Partners Fund II, LLP in November 2006, which, collectively with GI Partners Side Fund II, L.P., owns the majority of the outstanding stock of tel(x) as of June 30, 2011. Richard Magnuson, our director, Chairman and employee, is the chief executive officer of the advisor to GI Partners Fund II, LLP and GI Partners Side Fund II, L.P. Our condensed consolidated statements of operations include rental revenues of approximately $10.7 million and $5.8 million from tel(x) for the three months ended June 30, 2011 and 2010, respectively, and approximately $19.5 million and $10.9 million for the six months ended June 30, 2011 and 2010, respectively. Our condensed consolidated balance sheet includes deferred rent and unamortized deferred leasing costs of approximately $28.3 million and $21.0 million as of June 30, 2011 and December 31, 2010, respectively. In connection with the lease agreements, we entered into an operating agreement with tel(x), effective as of December 1, 2006, with respect to joint sales and marketing efforts, designation of representatives to manage the national relationship between us and tel(x) and future meet-me-room facilities. Under the operating agreement, tel(x) has a sixty-day option to enter into a meet-me-room lease for certain future meet-me-room buildings acquired by us or any buildings currently owned by us that are converted into a meet-me-room building. As of June 30, 2011, tel(x) leases 254,314 square feet of net rentable space from us under 39 lease agreements and as of December 31, 2010, tel(x) leased 202,987 square feet of net rentable space from us under 31 lease agreements.

We also entered into an agreement with tel(x), effective as of December 1, 2006, with respect to percentage rent arising out of potential future lease agreements for rentable space in buildings covered by the meet-me-room lease agreements. Percentage rent earned during the three months ended June 30, 2011 and 2010 amounted to approximately $0.6 million and $0.4 million, respectively, and $0.7 million and $0.4 million during the six months ended June 30, 2011 and 2010, respectively.

In addition, in connection with the lease agreements, we entered into a management agreement with tel(x), effective as of December 1, 2007, pursuant to which tel(x) agreed to provide us with certain management services in exchange for a management fee of one percent of rents actually collected by tel(x).

We are party to seven leases with SoftLayer, of which six are in place as of June 30, 2011 and the remaining one will commence in future periods. The initial terms of these leases expire from 2013 to 2025, and SoftLayer has options to extend them from 2018 through 2035. On August 3, 2010, GI Partners Fund III, L.P. acquired a controlling interest in SoftLayer. Richard Magnuson, our Chairman, is also a manager of the general partner to GI Partners Fund III, L.P. Our condensed consolidated statements of operations include rental revenues of approximately $4.6 million and $6.9 million from SoftLayer for the three and six months ended June 30, 2011, respectively. Our condensed consolidated statements of operations include rental revenues of approximately $0.4 million from SoftLayer for the three and six months ended June 30, 2010.

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Commitments and Contingencies (Details) (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Feb. 06, 2006
Space held for redevelopment	192,000
Commitments related to construction contracts	$ 119,200,000
350 East Cermak Road [Member]
Rental revenue sharing agreement, maximum per month	135,000
Payments made as part of revenue sharing agreement	800,000	3,800,000
Contingent liability	1,500,000		2,300,000
Clonshaugh Industrial Estate I [Member]
Payments made as part of revenue sharing agreement	100,000	100,000
Percentage of rental income entitled to the seller after return of capital invested in property to Company	40.00%
Return on capital invested (percentage)	9.00%
Estimated present value of payments				1,100,000
Accounts payable and other liabilities	1,400,000		1,300,000
29 A International Business Park [Member]
Additional performance based consideration earned (maximum)	50,000,000
Additional performance based consideration earned (maximum), adjusted for exchange rate	$ 40,700,000
Expiration of earnout contingency	November 2020

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Document and Entity Information	6 Months Ended
	Jun. 30, 2011	Aug. 01, 2011
Document Type	10-Q
Document Period End Date	Jun. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Registrant Name	Digital Realty Trust, Inc.
Entity Central Index Key	0001297996
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		99,376,058
Digital Realty Trust, L.P. [Member]
Document Period End Date	Jun. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2
Entity Registrant Name	Digital Realty Trust, L.P.
Entity Central Index Key	0001494877
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer

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Debt of the Operating Partnership (Revolving Credit Facility) (Details) In Thousands, unless otherwise specified														6 Months Ended
	Jun. 30, 2011 USD ($)	Jun. 30, 2011 USD [Member] Revolving Credit Facility [Member] USD ($)	Dec. 31, 2010 USD [Member] Revolving Credit Facility [Member] USD ($)	Jun. 30, 2011 Euro [Member]	Dec. 31, 2010 Euro [Member]	Jun. 30, 2011 Euro [Member] Revolving Credit Facility [Member] EUR (€)		Jun. 30, 2011 British Sterling [Member]	Dec. 31, 2010 British Sterling [Member]	Jun. 30, 2011 British Sterling [Member] Revolving Credit Facility [Member] GBP (£)		Dec. 31, 2010 British Sterling [Member] Revolving Credit Facility [Member] GBP (£)		Jun. 30, 2011 Revolving Credit Facility [Member] USD ($)		Dec. 31, 2010 Revolving Credit Facility [Member] USD ($)
Maturity Date														Aug. 31, 2011	[1]
Balance/Principal Outstanding	$ 341,400	$ 251,000	$ 312,500			€ 18,655	[2]			£ 71,762	[3]	£ 21,034	[3]	$ 341,417	[4]	$ 333,534	[4]
US LIBOR, EURIBOR and GBP LIBOR maturity range minimum (months)														1
US LIBOR, EURIBOR and GBP LIBOR maturity range maximum (months)														6
US LIBOR, EURIBOR and GBP LIBOR margin range minimum														1.10%
US LIBOR, EURIBOR and GBP LIBOR margin range maximum														2.00%
Revolving credit facility rate calculation federal funds rate per annum														1/2 of 1%
Revolving credit facility rate calculation federal funds rate margin minimum														0.10%
Revolving credit facility rate calculation federal funds rate margin maximum														1.00%
Fee incurred for unused portion of credit facility minimum percentage														0.125%
Fee incurred for unused portion of credit facility maximum percentage														0.20%
Revolving credit facility commitments extension (years)														1
Weighted-average interest rate		1.39%	1.40%			2.50%				1.83%		1.69%		1.54%		1.42%
Exchange rate				1.45	1.34			1.61	1.56

[1] A one-year extension is available, which we may exercise if certain conditions are met.

[2] Based on exchange rate of $1.45 to €1.00 as of June 30, 2011.

[3] Based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

[4] Balances as of June 30, 2011 and December 31, 2010 are as follows (balances, in thousands):

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Summary of Significant Accounting Policies (Policy)

6 Months Ended

Jun. 30, 2011

Summary of Significant Accounting Policies

(a) Principles of Consolidation and Basis of Presentation

(a) Principles of Consolidation and Basis of Presentation

The accompanying interim condensed consolidated financial statements include all of the accounts of Digital Realty Trust, Inc., the Operating Partnership and the subsidiaries of the Operating Partnership. Intercompany balances and transactions have been eliminated.

The accompanying interim condensed consolidated financial statements are unaudited, but have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) for interim financial information and in compliance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, they do not include all of the disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments necessary for a fair presentation have been included. All such adjustments are considered to be of a normal recurring nature, except as otherwise indicated. The results of operations for the interim periods are not necessarily indicative of the results to be obtained for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our annual report on Form 10-K for the year ended December 31, 2010.

The notes to the condensed consolidated financial statements of Digital Realty Trust, Inc. and the Operating Partnership have been combined to provide the following benefits:

• enhancing investors' understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both the Company and the Operating Partnership; and

• creating time and cost efficiencies through the preparation of one set of notes instead of two separate sets of notes.

There are few differences between the Company and the Operating Partnership, which are reflected in these condensed consolidated financial statements. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how Digital Realty Trust, Inc. and the Operating Partnership operate as an interrelated consolidated company. Digital Realty Trust, Inc.'s only material asset is its ownership of partnership interests of the Operating Partnership. As a result, Digital Realty Trust, Inc. does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public equity from time to time and guaranteeing certain unsecured debt of the Operating Partnership. Digital Realty Trust, Inc. itself does not hold any indebtedness but guarantees some of the unsecured debt of the Operating Partnership, as disclosed in these notes. The Operating Partnership holds substantially all the assets of the Company and holds the ownership interests in the Company's joint ventures. The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to the Operating Partnership in exchange for partnership units, the Operating Partnership generates the capital required by the Company's business through the Operating Partnership's operations, by the Operating Partnership's direct or indirect incurrence of indebtedness or through the issuance of partnership units.

The presentation of noncontrolling interests in operating partnership, stockholder's equity and partners' capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of the Operating Partnership. The common limited partnership interests held by the limited partners in the Operating Partnership are presented as limited partners' capital within partners' capital in the Operating Partnership's condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.'s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in the Operating Partnership are presented as general partner's capital within partners' capital in the Operating Partnership's condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders' equity in Digital Realty Trust, Inc.'s condensed consolidated financial statements. The differences in the presentations between stockholders' equity and partners' capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Operating Partnership levels.

To help investors understand the significant differences between the Company and the Operating Partnership, these condensed consolidated financial statements present the following separate sections for each of the Company and the Operating Partnership:

• condensed consolidated face financial statements; and

• the following notes to the condensed consolidated financial statements:

• Debt of the Company and Debt of the Operating Partnership;

• Income per Share and Income per Unit; and

• Equity and Accumulated Other Comprehensive Loss, Net of the Company and Capital and Comprehensive Income of the Operating Partnership.

In the sections that combine disclosure of Digital Realty Trust, Inc. and the Operating Partnership, these notes refer to actions or holdings as being actions or holdings of the Company. Although the Operating Partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the Company is appropriate because the business is one enterprise and the Company operates the business through the Operating Partnership.

(b) Cash Equivalents

(b) Cash Equivalents

For the purpose of the condensed consolidated statements of cash flows, we consider short-term investments with original maturities of 90 days or less to be cash equivalents. As of June 30, 2011, cash equivalents consist of investments in money market instruments.

(c) Share Based Compensation

(c) Share Based Compensation

We account for share based compensation using the fair value method of accounting. The estimated fair value of the stock options granted by us is being amortized on a straight-line basis over the vesting period of the stock options. The estimated fair value of the long-term incentive units and Class C Units (discussed in note 12(b)) granted by us is being amortized on a straight-line basis over the expected service period.

For share based compensation awards with performance conditions, we estimate the fair value of the award for each of the possible performance condition outcomes and amortize the compensation cost based on management's projected performance outcome. In the instance management's projected performance outcome changes prior to the final measurement date, compensation cost is adjusted accordingly.

(d) Income Taxes

(d) Income Taxes

Digital Realty Trust, Inc. (the Parent Company) has elected to be treated and believes that it has been organized and has operated in a manner that has enabled the Parent Company to qualify as a REIT for federal income tax purposes. As a REIT, the Parent Company generally is not required to pay federal corporate income taxes on its taxable income to the extent it is currently distributed to its stockholders.

However, qualification and taxation as a REIT depend upon the Parent Company's ability to meet the various qualification tests imposed under the Internal Revenue Code of 1986, as amended (the Code), including tests related to annual operating results, asset composition, distribution levels and diversity of stock ownership. Accordingly, no assurance can be given that the Parent Company has been organized or has operated or will continue to operate in a manner so as to qualify or remain qualified as a REIT. If the Parent Company fails to qualify as a REIT in any taxable year, it will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates.

The Operating Partnership is a partnership and is not required to pay federal income tax. Instead, taxable income is allocated to its partners, who include such amounts on their federal income tax returns. As such, no provision for federal income taxes has been included in the Operating Partnership's accompanying condensed consolidated financial statements.

Even if the Parent Company and the Operating Partnership are not subject to federal income taxes, they are taxed in certain states in which they operate. The Company is also taxed in non-U.S. countries where it operates that do not recognize U.S. REITs under their respective tax laws. The Company's consolidated taxable REIT subsidiary is subject to both federal and state income taxes to the extent there is taxable income. Accordingly, the Company recognizes and accrues income taxes for its taxable REIT subsidiary, certain states and non-U.S. jurisdictions, as appropriate.

We assess our significant tax positions in accordance with U.S. GAAP for all open tax years and determine whether we have any material unrecognized liabilities from uncertain tax benefits. If a tax position is not considered "more-likely-than-not" to be sustained solely on its technical merits, no benefits of the tax position are to be recognized (for financial statement purposes). As of June 30, 2011 and December 31, 2010, we have no assets or liabilities for uncertain tax positions. We classify interest and penalties from significant uncertain tax positions as interest expense and operating expense, respectively, in our condensed consolidated statements of operations. For the three and six months ended June 30, 2011 and 2010, we had no such interest or penalties. The tax years 2007 through 2010 remain open to examination by the major taxing jurisdictions with which the Parent Company and its subsidiaries file tax returns.

See Note 9 for further discussion on income taxes.

(e) Presentation of Transactional-based Taxes

(e) Presentation of Transactional-based Taxes

We account for transactional-based taxes, such as value added tax, or VAT, for our international properties on a net basis.

(f) Asset Retirement Obligations

(g) Assets and Liabilities Measured at Fair Value

(g) Assets and Liabilities Measured at Fair Value

Fair value under U.S. GAAP is a market-based measurement, not an entity-specific measurement. Therefore, our fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair-value measurements, we use a fair-value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity's own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which are typically based on an entity's own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair-value measurement is based on inputs from different levels of the fair-value hierarchy, the level in the fair-value hierarchy within which the entire fair-value measurement falls is based on the lowest level input that is significant to the fair-value measurement in its entirety. Our assessment of the significance of a particular input to the fair-value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

(h) Construction Management Revenue

(h) Construction Management Revenue

Construction management revenue is recognized under the percentage-of-completion method of accounting. Revenues are determined by measuring the percentage of total costs incurred to date to estimated total costs for each construction management contract based on current estimates of costs to complete. Contract costs include all labor and benefits, materials, subcontracts, and an allocation of indirect costs related to contract performance. Indirect costs are allocated to projects based upon labor hours charged. As long-term design-build projects extend over one or more years, revisions in cost and estimated earnings during the course of the work are reflected in the accounting period in which the facts which require the revision become known. At the time a loss on a design-build project becomes known, the entire amount of the estimated ultimate loss is recognized in the condensed consolidated financial statements. Change orders are recognized when they are approved by the client.

Costs and estimated earnings in excess of billings on uncompleted construction management projects are included in other assets in the condensed consolidated balance sheets. Billings in excess of costs and estimated earnings on uncompleted construction management projects are included in accounts payable and accrued liabilities in the condensed consolidated balance sheets. Customers are billed on a monthly basis at the end of each month, which can be in advance of work performed.

(i) Transactions Expense

(i) Transactions Expense

Transactions expense includes acquisition-related expenses and other business development expenses, which are expensed as incurred. Acquisition-related expenses include closing costs, broker commissions and other professional fees, including legal and accounting fees related to acquisitions and potential acquisitions.

(j) Capitalization of Costs

(j) Capitalization of Costs

Direct and indirect project costs that are clearly associated with the development and redevelopment of properties are capitalized as incurred. Project costs include all costs directly associated with the development or redevelopment of a property, including construction costs, interest, property taxes, insurance, legal fees and costs of personnel working on the project. Indirect costs that do not clearly relate to the projects under development/redevelopment are not capitalized and are charged to expense as incurred.

Capitalization of costs begins when the activities necessary to get the development/redevelopment project ready for its intended use begins, which include costs incurred before the beginning of construction. Capitalization of costs ceases when the development/redevelopment project is substantially complete and ready for its intended use. Determining when a development/redevelopment project commences, and when it is substantially complete and ready for its intended use involves a degree of judgment. We generally consider a development/redevelopment project to be substantially complete and ready for its intended use upon recommissioning, which is when the redeveloped/developed project has been tested at full load, or receipt of a certificate of occupancy. We cease cost capitalization if activities necessary for the development/redevelopment of the property have been suspended. Capitalized costs are allocated to the specific components of a project that are benefited.

(k) Management's Estimates

   (k) Management's Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates made. On an on-going basis, we evaluate our estimates, including those related to acquiring, developing and assessing the carrying values of our real estate properties, accrued liabilities, performance-based equity compensation plans, and Digital Realty Trust, Inc.'s qualification as a REIT. We base our estimates on historical experience, current market conditions, and various other assumptions that are believed to be reasonable under the circumstances. Actual results may vary from those estimates and those estimates could vary under different assumptions or conditions.

(l) Segment Information

(l) Segment Information

All of our properties generate similar revenues and expenses related to tenant rent and reimbursements and operating expenses. The delivery of our products is consistent across all properties and although services are provided to a wide range of customers, the types of services provided to them are limited to a few core principles. As such, the properties in our portfolio have similar economic characteristics and the nature of the products and services provided to our customers and the method to distribute such services are consistent throughout the portfolio. Consequently, our properties qualify for aggregation into one reporting segment.

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Debt of the Operating Partnership (5.50 Notes) (Narrative) (Details) (5.50% Exchangeable Senior Debentures due 2029 [Member], USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2011		Dec. 31, 2010	Apr. 15, 2024	Apr. 15, 2019	Apr. 15, 2014	Apr. 20, 2009
Notes issuance date	April 20, 2009
Exchangeable senior debenture face amount at time of issuance							$ 266,400,000
Interest Rate at June 30, 2011	5.50%
Debt issuance costs	$ 7,800,000
Interest payable dates	October 15 and April 15
First required interest payment	October 15, 2009
Common stock exchange rate (% of shares per $1,000 in principal)	0.02354%		0.02326%
Reference dividend rate	$ 0.33
Dates which the holders of may require the Operating Partnership to repurchase the debentures				April 15, 2024	April 15, 2019	April 15, 2014
Purchase price/Redemption price percentage of debenture principal			100
Exchangeable Senior Debentures [Member]
Interest Rate at June 30, 2011	5.50%
Maturity Date	Apr. 15, 2029	[1]
Right to redeem date	April 18, 2014

[1] The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of April 15, 2014, April 15, 2019 and April 15, 2024. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on April 18, 2014.

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Derivative Instruments (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011		Jun. 30, 2011		Jun. 30, 2010	Dec. 31, 2010
Fair value of effective cash flow hedges	$ (5,700,000)		$ (5,700,000)			$ (8,000,000)
Ineffective portion of cash flow hedges	0		0		0
Reclassified as increase to interest expense			3,800,000
Notional Amount	267,612,000		267,612,000			274,042,000
Fair Value at Significant Other Observable Inputs (Level 2)	(5,692,000)		(5,692,000)			(7,997,000)
Swap 1 [Member]
Notional Amount						19,515,000	[1]
Type of Derivative			Swap
Strike Rate	4.944		4.944
Effective Date			Jul. 10, 2006
Expiration Date			Apr. 10, 2011
Fair Value at Significant Other Observable Inputs (Level 2)						(231,000)
Swap 2 [Member]
Notional Amount	68,747,000	[1]	68,747,000	[1]		66,858,000	[1]
Type of Derivative			Swap
Strike Rate	2.980		2.980
Effective Date			Apr. 06, 2009
Expiration Date			Nov. 30, 2013
Fair Value at Significant Other Observable Inputs (Level 2)	(2,606,000)		(2,606,000)			(2,471,000)
Swap 3 [Member]
Notional Amount	15,024,000	[2]	15,024,000	[2]		13,978,000	[2]
Type of Derivative			Swap
Strike Rate	3.981		3.981
Effective Date			May 17, 2006
Expiration Date			Jul. 18, 2013
Fair Value at Significant Other Observable Inputs (Level 2)	(593,000)		(593,000)			(828,000)
Swap 4 [Member]
Notional Amount	10,870,000	[2]	10,870,000	[2]		10,113,000	[2]
Type of Derivative			Swap
Strike Rate	4.070		4.070
Effective Date			Jun. 23, 2006
Expiration Date			Jul. 18, 2013
Fair Value at Significant Other Observable Inputs (Level 2)	(448,000)		(448,000)			(621,000)
Swap 5 [Member]
Notional Amount	9,566,000	[2]	9,566,000	[2]		8,900,000	[2]
Type of Derivative			Swap
Strike Rate	3.989		3.989
Effective Date			Jul. 27, 2006
Expiration Date			Oct. 18, 2013
Fair Value at Significant Other Observable Inputs (Level 2)	(412,000)		(412,000)			(557,000)
Swap 6 [Member]
Notional Amount	44,534,000	[2]	44,534,000	[2]		41,430,000	[2]
Type of Derivative			Swap
Strike Rate	3.776		3.776
Effective Date			Dec. 05, 2006
Expiration Date			Jan. 18, 2012
Fair Value at Significant Other Observable Inputs (Level 2)	(516,000)		(516,000)			(1,129,000)
Swap 7 [Member]
Notional Amount	38,289,000	[2]	38,289,000	[2]		35,620,000	[2]
Type of Derivative			Swap
Strike Rate	4.000		4.000
Effective Date			Dec. 20, 2006
Expiration Date			Jan. 18, 2012
Fair Value at Significant Other Observable Inputs (Level 2)	(491,000)		(491,000)			(1,054,000)
Swap 8 [Member]
Notional Amount	43,506,000	[2]	43,506,000	[2]		40,152,000	[2]
Type of Derivative			Swap
Strike Rate	2.703		2.703
Effective Date			Dec. 03, 2009
Expiration Date			Sep. 04, 2014
Fair Value at Significant Other Observable Inputs (Level 2)	(630,000)		(630,000)			(1,139,000)
Cap 1 [Member]
Notional Amount	16,576,000		16,576,000			16,976,000
Type of Derivative			Cap
Strike Rate	4.000		4.000
Effective Date			Jun. 24, 2009
Expiration Date			Jun. 25, 2012
Fair Value at Significant Other Observable Inputs (Level 2)						3,000
Cap 2 [Member]
Notional Amount	20,500,000		20,500,000			20,500,000
Type of Derivative			Cap
Strike Rate	4.000		4.000
Effective Date			Aug. 04, 2010
Expiration Date			Jun. 15, 2013
Fair Value at Significant Other Observable Inputs (Level 2)	$ 4,000		$ 4,000			$ 30,000
Euro [Member]
Exchange rate	1.45		1.45			1.34
British Sterling [Member]
Exchange rate	1.61		1.61			1.56

[1] Translation to U.S. dollars is based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

[2] Translation to U.S. dollars is based on exchange rate of $1.45 to €1.00 as of June 30, 2011 and $1.34 to €1.00 as of December 31, 2010.

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Acquired Intangible Assets and Liabilities

6 Months Ended

Jun. 30, 2011

Acquired Intangible Assets and Liabilities

Acquired Intangible Assets and Liabilities

4. Acquired Intangible Assets and Liabilities

The following summarizes our acquired intangible assets (acquired in place lease value and acquired above-market lease value) and intangible liabilities (acquired below-market lease value) as of June 30, 2011 and December 31, 2010.

	Balance as of
(Amounts in thousands)	June 30, 2011			December 31, 2010
Acquired in place lease value:
Gross amount	$	518,357		$	515,958
Accumulated amortization		(290,853	)		(261,978	)
Net	$	227,504		$	253,980
Acquired above-market lease value:
Gross amount	$	88,126		$	87,622
Accumulated amortization		(53,620	)		(47,083	)
Net	$	34,506		$	40,539
Acquired below-market lease value:
Gross amount	$	191,940		$	189,990
Accumulated amortization		(107,422	)		(96,740	)
Net	$	84,518		$	93,250

Amortization of acquired below-market lease value, net of acquired above-market lease value, resulted in an increase to rental revenues of $1.9 million and $2.4 million for the three months ended June 30, 2011 and 2010, respectively, and $3.7 million and $4.7 million for the six months ended June 30, 2011 and 2010, respectively. The expected average remaining lives for acquired below-market leases and acquired above-market leases is 4.8 years and 3.6 years, respectively, as of June 30, 2011. Estimated annual amortization of acquired below-market lease value, net of acquired above-market lease value, for each of the five succeeding years, commencing January 1, 2012 is as follows:

(Amounts in thousands)
2012	$	6,546
2013		7,115
2014		5,754
2015		5,088
2016		4,208

Costs associated with extending or renewing acquired leases are capitalized as exercised and classified as deferred leasing cost. Amortization of acquired in place lease value (a component of depreciation and amortization expense) was $13.5 million and $10.2 million for the three months ended June 30, 2011 and 2010, respectively, and $27.8 million and $20.1 million for the six months ended June 30, 2011 and 2010, respectively. The expected average amortization period for acquired in place lease value is 4.5 years as of June 30, 2011. The weighted average period prior to the next renewal or extension related to remaining contractual life for acquired leases is 3.9 years as of June 30, 2011. Estimated annual amortization of acquired in place lease value for each of the five succeeding years, commencing January 1, 2012 is as follows:

(Amounts in thousands)
2012	$	42,321
2013		37,960
2014		33,062
2015		24,816
2016		16,371

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Acquisitions (Tables)

6 Months Ended

Jun. 30, 2011

Acquisitions

Schedule of Real Estate Property Acquisitions

Location	Metropolitan Area	Date Acquired	Amount (in millions)
Loudoun Parkway North (1)	Northern Virginia	April 15, 2011	$	17.3

(1) Represents vacant land which is not included in our operating property count.

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Acquired Intangible Assets and Liabilities (Schedule of Estimated Annual Amortization of Leases) (Details) (USD $) In Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Acquired Above-Market Leases [Member]
Estimated annual amortization expense	$ 4,208	$ 5,088	$ 5,754	$ 7,115	$ 6,546
Acquired in Place Lease Value [Member]
Estimated annual amortization expense	$ 16,371	$ 24,816	$ 33,062	$ 37,960	$ 42,321

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Organization and Description of Business (Narrative) (Details)	Jun. 30, 2011
Number of properties owned	96
North America [Member]
Number of properties owned	81
Europe [Member]
Number of properties owned	14
Asia [Member]
Number of properties owned	1
Joint Ventures [Member]
Number of properties held as investments in unconsolidated joint ventures	2
Common Interest [Member]
Ownership percentage in the Operating Partnership	95.10%
Preferred Interest [Member]
Ownership percentage in the Operating Partnership	100.00%

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Subsequent Events

6 Months Ended

Jun. 30, 2011

Subsequent Events

Subsequent Events

17. Subsequent Events

On July 14, 2011, we commenced an offer to repurchase, at the option of each holder, any and all of the Operating Partnership's outstanding 2026 Debentures at a price equal to 100% of the principal amount, as required by the terms of the indenture governing the 2026 Debentures. The repurchase offer will expire at 5:00 p.m., New York City time, on August 11, 2011. We also distributed a Notice of Redemption to the holders of the 2026 Debentures that the Operating Partnership intends to redeem all of the outstanding 2026 Debentures, pursuant to its option under the indenture governing the 2026 Debentures, on August 18, 2011, at a price equal to 100% of the principal amount, plus accrued and unpaid interest thereon to, but excluding, the redemption date. In connection with the redemption, holders of the 2026 Debentures have the right to exchange their 2026 Debentures prior to 5:00 p.m., New York City time, on August 16, 2011. 2026 Debentures not surrendered pursuant to the repurchase offer prior to 5:00 p.m., New York City time, on August 11, 2011, or for exchange prior to 5:00 p.m., New York City time, on August 16, 2011, will be redeemed by the Company on August 18, 2011.

On July 21, 2011, we completed the acquisition of an 8.6 acre development site in Sydney, Australia. The purchase price was approximately AUD 10.1 million (or $11.0 million based on the rate of exchange on July 21, 2011) and was funded with borrowings under our revolving credit facility.

On July 25, 2011, we repaid the $25.0 million of 7.0% Series A unsecured notes under the Prudential shelf facility at maturity. The repayment was funded with borrowings under our revolving credit facility.

On July 25, 2011, we declared the following dividends per share and the Operating Partnership declared an equivalent distribution per unit:

Share Class	Series C Preferred Stock		Series D Preferred Stock		Common stock and common unit
Dividend and distribution amount	$	0.273438	$	0.343750	$	0.680000
Dividend and distribution payable date		September 30, 2011		September 30, 2011		September 30, 2011
Dividend payable to shareholders of record on		September 15, 2011		September 15, 2011		September 15, 2011
Annual equivalent rate of dividend and distribution	$	1.094	$	1.375	$	2.720

On July 26, 2011, we completed the acquisition of a redevelopment site in London, U.K. The purchase price was £12.9 million (or $21.2 million based on the rate of exchange on July 26, 2011) and was funded with borrowings under our revolving credit facility.

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Income Taxes

6 Months Ended

Jun. 30, 2011

Income Taxes

Income Taxes

9. Income Taxes

Digital Realty Trust, Inc. (the Parent Company) elected to be taxed as a REIT and believes that it has complied with the REIT requirements of the Code. As a REIT, the Parent Company is generally not subject to corporate level federal income taxes on taxable income to the extent it is currently distributed to its stockholders. Since inception, the Parent Company has distributed 100% of its taxable income and intends to do so for the tax year ending December 31, 2011. As such, no provision for federal income taxes has been included in the accompanying condensed consolidated financial statements for the three and six months ended June 30, 2011 and 2010.

We have elected taxable REIT subsidiary (TRS) status for some of our consolidated subsidiaries. In general, a TRS may provide services that would otherwise be considered impermissible for REITs and hold assets that REITs cannot hold directly. A TRS is subject to federal income tax as a regular C corporation. Income taxes for TRS entities are accrued, as necessary, for the three and six months ended June 30, 2011 and 2010.

For our TRS entities and foreign subsidiaries that are subject to U.S. federal, state and foreign income taxes, deferred tax assets and liabilities are established for temporary differences between the financial reporting basis and the tax basis of assets and liabilities at the enacted tax rates expected to be in effect when the temporary differences reverse. A valuation allowance for deferred tax assets is provided if we believe it is more likely than not that the deferred tax asset may not be realized, based on available evidence at the time the determination is made. An increase or decrease in the valuation allowance that results from the change in circumstances that causes a change in our judgment about the realizability of the related deferred tax asset is included in income. Deferred tax assets (net of valuation allowance) and liabilities for our TRS entities and foreign subsidiaries are accrued, as necessary, for the three and six months ended June 30, 2011 and 2010.

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Condensed Consolidated Statements of Cash Flows In Thousands	6 Months Ended
	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Jun. 30, 2011 Digital Realty Trust, L.P. [Member] USD ($)	Jun. 30, 2010 Digital Realty Trust, L.P. [Member] USD ($)	Jun. 30, 2010 Digital Realty Trust, L.P. [Member] 5.875% due 2020 [Member] USD ($)	Jun. 30, 2011 Digital Realty Trust, L.P. [Member] 5.250% due 2021 [Member] USD ($)	Jun. 30, 2010 5.875% due 2020 [Member] USD ($)	Jun. 30, 2011 5.250% due 2021 [Member] USD ($)
Cash flows from operating activities:
Net income	$ 77,240	$ 45,488	$ 77,240	$ 45,488
Adjustments to reconcile net income to net cash provided by operating activities
Loss on early extinguishment of debt-non cash portion	567	1,193	567	1,193
Equity in earnings of unconsolidated joint venture	(2,266)	(2,933)	(2,266)	(2,933)
Distributions from unconsolidated joint venture	2,000	2,000	2,000	2,000
Write-off of net assets due to early lease terminations	81	167	81	167
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases	118,520	93,940	118,520	93,940
Amortization of share-based unearned compensation	6,702	6,601	6,702	6,601
(Recovery of) allowance for doubtful accounts	(1,295)	296	(1,295)	296
Amortization of deferred financing costs	4,961	5,335	4,961	5,335
Write-off of deferred financing costs, included in net loss on early extinguishment of debt	85		85
Amortization of debt discount/premium	1,498	2,256	1,498	2,256
Amortization of acquired in place lease value and deferred leasing costs	32,246	23,453	32,246	23,453
Amortization of acquired above market leases and acquired below market leases, net	(3,674)	(4,704)	(3,674)	(4,704)
Changes in assets and liabilities:
Restricted cash	2,654	2,043	2,654	2,043
Accounts and other receivables	(7,224)	(9,017)	(7,224)	(9,017)
Deferred rent	(27,053)	(21,682)	(27,053)	(21,682)
Deferred leasing costs	(7,770)	(5,122)	(7,770)	(5,122)
Other assets	(12,915)	(6,561)	(12,915)	(6,561)
Accounts payable and other accrued liabilities	4,154	14,020	4,154	14,020
Security deposits and prepaid rents	1,212	(3,701)	1,212	(3,701)
Net cash provided by operating activities	189,723	143,072	189,723	143,072
Cash flows from investing activities:
Acquisitions of real estate	(17,523)	(405,983)	(17,523)	(405,983)
Investment in unconsolidated joint venture	(244)		(244)
Deposits paid for acquisitions of real estate	(2,224)	(25,000)	(2,224)	(25,000)
Receipt of value added tax refund	5,623	1,818	5,623	1,818
Refundable value added tax paid	(7,674)	(2,077)	(7,674)	(2,077)
Change in restricted cash	118	(1,626)	118	(1,626)
Improvements to and advances for investments in real estate	(307,890)	(153,701)	(307,890)	(153,701)
Improvement advances to tenants	(2,935)	(911)	(2,935)	(911)
Collection of advances from tenants for improvements	1,728	994	1,728	994
Net cash used in investing activities	(331,021)	(586,486)	(331,021)	(586,486)
Cash flows from financing activities:
Borrowings on revolving credit facility	537,431	291,404	537,431	291,404
Repayments on revolving credit facility	(527,500)	(485,547)	(527,500)	(485,547)
Borrowings on unsecured senior notes		117,000		117,000	491,480	399,100	491,480	399,100
Principal payments on mortgage loans	(123,645)	(6,705)	(123,645)	(6,705)
Principal repayments on 2026 exchangeable senior debentures	(40,457)	(250)	(40,457)	(250)
Equity component settled associated with exchange of 2026 exchangeable senior debentures	(11,783)		(11,783)
Change in restricted cash	1,311	514	1,311	514
Payment of loan fees and costs	(3,825)	(5,544)	(3,825)	(5,544)
Capital contributions received from noncontrolling interests in joint venture	42	4,833	42	4,833
Gross proceeds from the sale of common stock	179,583	461,868
Common stock offering costs paid	(3,317)	(17,183)
Proceeds from exercise of stock options	3,053	3,638
General partner contributions			179,319	448,323
Payment of dividends/distributions to preferred stockholders/unitholders	(11,235)	(20,202)	(11,235)	(20,202)
Payment of dividends/distributions to common stockholders/unitholders and distributions to noncontrolling interests in operating partnership	(188,039)	(121,589)	(188,039)	(121,589)
Purchase of noncontrolling interests in consolidated joint venture	(53,240)		(53,240)
Net cash provided by financing activities	157,479	713,717	157,479	713,717
Net increase in cash and cash equivalents	16,181	270,303	16,181	270,303
Cash and cash equivalents at beginning of period	11,719	72,320	11,719	72,320
Cash and cash equivalents at end of period	27,900	342,623	27,900	342,623
Supplemental disclosure of cash flow information:
Cash paid for interest, including amounts capitalized	72,557	49,293	72,557	49,293
Cash paid for taxes	1,080	695	1,080	695
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments	25,037	(37,519)	25,037	(37,519)
Decrease in accounts payable and other accrued liabilities related to change in fair value of interest rate swaps	(947)	(6,096)	(947)	(6,096)
Noncontrolling interests in operating partnership redeemed for or converted to shares of common stock	6,434	7,179	6,434	7,179
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses	126,039	80,439	126,039	80,439
Accrual of contingent purchase price for investments in real estate		7,440		7,440
Issuance of common stock in exchange of 2026 exchangeable senior debentures, net	230	36,989	230	36,989
Allocation of purchase price of real estate/investment in partnership to:
Investments in real estate	17,523	377,419	17,523	377,419
Acquired above market leases		9,714		9,714
Acquired below market leases		(26,450)		(26,450)
Acquired in place lease value and deferred leasing costs		45,300		45,300
Cash paid for acquisition of real estate	$ 17,523	$ 405,983	$ 17,523	$ 405,983

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Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2011

Derivative Instruments

Schedule of Outstanding Derivative Instruments

Notional Amount												Fair Value at Significant Other Observable Inputs (Level 2)
As of June 30, 2011			As of December 31, 2010			Type of Derivative		Strike Rate		Effective Date	Expiration Date	As of June 30, 2011			As of December 31, 2010
$	—		$	19,515	(1)		Swap		4.944	Jul. 10, 2006	Apr. 10, 2011	$	—		$	(231	)
	68,747	(1)		66,858	(1)		Swap		2.980	April 6, 2009	Nov. 30, 2013		(2,606	)		(2,471	)
	15,024	(2)		13,978	(2)		Swap		3.981	May 17, 2006	Jul. 18, 2013		(593	)		(828	)
	10,870	(2)		10,113	(2)		Swap		4.070	Jun. 23, 2006	Jul. 18, 2013		(448	)		(621	)
	9,566	(2)		8,900	(2)		Swap		3.989	Jul. 27, 2006	Oct. 18, 2013		(412	)		(557	)
	44,534	(2)		41,430	(2)		Swap		3.776	Dec. 5, 2006	Jan. 18, 2012		(516	)		(1,129	)
	38,289	(2)		35,620	(2)		Swap		4.000	Dec. 20, 2006	Jan. 18, 2012		(491	)		(1,054	)
	43,506	(2)		40,152	(2)		Swap		2.703	Dec. 3, 2009	Sep. 4, 2014		(630	)		(1,139	)
	16,576			16,976			Cap		4.000	June 24, 2009	June 25, 2012		—			3
	20,500			20,500			Cap		4.000	Aug. 4, 2010	June 15, 2013		4			30
$	267,612		$	274,042								$	(5,692	)	$	(7,997	)

(1) Translation to U.S. dollars is based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

(2) Translation to U.S. dollars is based on exchange rate of $1.45 to €1.00 as of June 30, 2011 and $1.34 to €1.00 as of December 31, 2010.

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Debt of the Operating Partnership

6 Months Ended

Jun. 30, 2011

Debt of the Operating Partnership

Debt of the Operating Partnership

6. Debt of the Operating Partnership

A summary of outstanding indebtedness of the Operating Partnership as of June 30, 2011 and December 31, 2010, respectively, is as follows (in thousands):

Indebtedness	Interest Rate at June 30, 2011	Maturity Date	Principal Outstanding June 30, 2011			Principal Outstanding December  31, 2010
Revolving credit facility	Various (1)	Aug. 31, 2011 (2)	$	341,417	(3)	$	333,534	(3)
Unsecured senior notes:
Prudential Shelf Facility:
Series A	7.000%	Jul. 24, 2011		25,000			25,000
Series B	9.320%	Nov. 5, 2013		33,000			33,000
Series C	9.680%	Jan. 6, 2016		25,000			25,000
Series D	4.570%	Jan. 20, 2015		50,000			50,000
Series E	5.730%	Jan. 20, 2017		50,000			50,000
Series F	4.500%	Feb. 3, 2015		17,000			17,000
Total Prudential Shelf Facility				200,000			200,000
Senior Notes:
4.50% notes due 2015	4.500%	Jul. 15, 2015		375,000			375,000
5.875% notes due 2020	5.875%	Feb. 1, 2020		500,000			500,000
5.25% notes due 2021	5.250%	Mar. 15, 2021		400,000			—
Unamortized discounts				(9,413	)		(8,970	)
Total senior notes, net of discount				1,265,587			866,030
Total unsecured senior notes, net of discount				1,465,587			1,066,030
Exchangeable senior debentures:
4.125% exchangeable senior debentures due 2026	4.125%	Aug. 15, 2026 (4)		48,301			88,758
5.50% exchangeable senior debentures due 2029	5.50%	Apr. 15, 2029 (5)		266,400			266,400
Unamortized discount				(113	)		(1,456	)
Total exchangeable senior debentures, net of discount				314,588			353,702

Indebtedness	Interest Rate at June 30, 2011	Maturity Date	Principal Outstanding June 30, 2011			Principal Outstanding December  31, 2010
Mortgage loans:
Secured Term Debt (6)(7)	5.65%	Nov. 11, 2014		140,186			141,465
3 Corporate Place (7)(8)	6.72%	Aug. 1, 2011		—	(15)		80,000
200 Paul Avenue 1-4 (7)	5.74%	Oct. 8, 2015		75,325			76,179
2045 & 2055 LaFayette Street (7)	5.93%	Feb. 6, 2017		65,995			66,437
Mundells Roundabout	3-month GBP LIBOR + 1.20% (9)	Nov. 30, 2013		68,747	(10)		66,858	(10)
600 West Seventh Street	5.80%	Mar. 15, 2016		53,443			54,157
34551 Ardenwood Boulevard 1-4 (7)	5.95%	Nov. 11, 2016		53,967			54,306
1100 Space Park Drive (7)	5.89%	Dec. 11, 2016		53,954			54,296
1350 Duane Avenue/3080 Raymond Street (7)	5.42%	Oct. 1, 2012		52,800			52,800
150 South First Street (7)	6.30%	Feb. 6, 2017		51,832			52,154
114 Rue Ambroise Croizat	3-month EURIBOR + 1.35% (9)	Jan. 18, 2012		44,534	(11)		41,430	(11)
Clonshaugh Industrial Estate II (8)	3-month EURIBOR + 4.50% (9)	Sep. 4, 2014		43,506	(11)		40,152	(11)
1500 Space Park Drive (7)	6.15%	Oct. 5, 2013		38,921			39,941
2334 Lundy Place (7)	5.96%	Nov. 11, 2016		39,250			39,496
Unit 9, Blanchardstown Corporate Park	3-month EURIBOR + 1.35% (9)	Jan. 18, 2012		38,289	(11)		35,620	(11)
Cressex 1 (13)	5.68%	Oct. 16, 2014		28,944	(10)		28,388	(10)
6 Braham Street (8)	3-month GBP LIBOR + 0.90% (9)	Apr. 10, 2011		—	(15)		19,515	(10)
1201 Comstock Street (7)(8)	1-month LIBOR + 3.50% (9)	Jun. 24, 2012 (2)		16,576			16,976
Datacenter Park — Dallas	5.00%	Sep. 15, 2011		—	(15)		16,150
Paul van Vlissingenstraat 16	3-month EURIBOR + 1.60% (9)	Jul. 18, 2013		15,024	(11)		13,978	(11)
Chemin de l'Epinglier 2	3-month EURIBOR + 1.50% (9)	Jul. 18, 2013		10,870	(11)		10,113	(11)
800 Central Expressway (7)	1-month LIBOR + 4.75%	Jun. 9, 2013		10,000			10,000
Gyroscoopweg 2E-2F (12)	3-month EURIBOR + 1.50% (9)	Oct. 18, 2013		9,566	(11)		8,900	(11)
1125 Energy Park Drive (7)	7.62% (14)	Mar. 1, 2032		8,983			9,060
Manchester Technopark (13)	5.68%	Oct. 16, 2014		8,805	(10)		8,636	(10)
731 East Trade Street	8.22%	Jul. 1, 2020		4,946			5,080
Unamortized net premiums				1,022			1,101
Total mortgage loans, net of premiums				935,485			1,043,188
Other secured loan:
800 Central Expressway Mezzanine (7)	1-month LIBOR + 8.50%	Jun. 9, 2013		10,500			10,500
Total other secured loan				10,500			10,500
Total indebtedness			$	3,067,577		$	2,806,954

(1) The interest rate under our revolving credit facility equals either (i) US LIBOR, EURIBOR and GBP LIBOR (ranging from 1- to 6-month maturities) plus a margin of between 1.10% and 2.00% or (ii) the greater of (x) the base rate announced by the lender and (y) 1/2 of 1% per annum above the federal funds rate, plus a margin of between 0.100%-—1.000%. In each case, the margin is based on our total leverage ratio. We incur a fee ranging from 0.125% to 0.20% for the unused portion of our unsecured revolving credit facility.

(2) A one-year extension is available, which we may exercise if certain conditions are met.

(3) Balances as of June 30, 2011 and December 31, 2010 are as follows (balances, in thousands):

Denomination of Draw	Balance as of June 30, 2011			Weighted-average interest rate			Balance as of December 31, 2010			Weighted- average interest rate
US ($)	$	251,000			1.39	%	$	312,500			1.40	%
Euro (€)		18,655	(a)		2.50	%		—			—
British Sterling (£)		71,762	(b)		1.83	%		21,034	(b)		1.69	%
Total	$	341,417			1.54	%	$	333,534			1.42	%

(a) Based on exchange rate of $1.45 to €1.00 as of June 30, 2011.

(b) Based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

(4) The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of August 15, 2011, August 15, 2016 and August 15, 2021. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on August 18, 2011.

(5) The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of April 15, 2014, April 15, 2019 and April 15, 2024. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on April 18, 2014.

(6) This amount represents six mortgage loans secured by our interests in 36 NE 2nd Street, 3300 East Birch Street, 100 & 200 Quannapowitt Parkway, 300 Boulevard East, 4849 Alpha Road, and 11830 Webb Chapel Road. Each of these loans is cross-collateralized by the six properties.

(7) The respective borrower's assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person.

(8) The Operating Partnership or its subsidiary provides a limited recourse guarantee with respect to this loan.

(9) We have entered into interest rate swap or interest rate cap agreements as a cash flow hedge for interest generated by these US LIBOR, EURIBOR and GBP LIBOR based loans. See note 13 for further information.

(10) Based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

(11) Based on exchange rate of $1.45 to €1.00 as of June 30, 2011 and $1.34 to €1.00 as of December 31, 2010.

(12) This loan is also secured by a €1.3 million letter of credit.

(13) These loans are also secured by a £7.8 million letter of credit. These loans are cross-collateralized by the two properties.

(14) If the loan is not repaid by March 1, 2012, the interest rate increases to the greater of 9.62% or the treasury rate then in effect plus 2%. Subject to a prepayment lock-out period through December 2011.

(15) These mortgages loans were repaid in full; 6 Braham Street (April 2011), 3 Corporate Place (May 2011) and Datacenter Park — Dallas (June 2011). Net loss from early extinguishment of debt related to prepayment costs on 3 Corporate Place amounted to $0.3 million for the three and six months ended June 30, 2011.

Revolving Credit Facility

As of June 30, 2011, our revolving credit facility had a total capacity of $750.0 million. Our revolving credit facility matures on August 31, 2011, subject to a one-year extension option. The bank group is obligated to grant the extension option provided we give proper notice, we make certain representations and warranties and no default exists under the revolving credit facility. As of June 30, 2011, borrowings under the revolving credit facility bore interest at a blended rate of 1.39% (U.S), 2.50% (Euro) and 1.83% (GBP), which are based on 1-month LIBOR, 1-month EURIBOR and 1-month GBP LIBOR, respectively, plus a margin of 1.20%. The revolving credit facility has a $515.0 million sub-facility for multicurrency advances in British Pounds Sterling, Canadian Dollars, Euros, and Swiss Francs. We intend to use available borrowings under the revolving credit facility to, among other things, finance the acquisition of additional properties, fund tenant improvements and capital expenditures, fund development and redevelopment activities and to provide for working capital and other corporate purposes, including potentially for the repurchase, redemption or retirement of outstanding debt securities. As of June 30, 2011, approximately $341.4 million was drawn under this facility and $30.5 million of letters of credit were issued.

The credit facility contains various restrictive covenants, including limitations on our ability to incur additional indebtedness, make certain investments or merge with another company, and requirements to maintain financial coverage ratios as well as a pool of unencumbered assets. In addition, a downgrade in Digital Realty Trust, Inc.'s credit rating below investment grade may trigger additional payments or other consequences under our credit facility. In addition, except to enable Digital Realty Trust, Inc. to maintain its status as a REIT for federal income tax purposes or as may otherwise be required to avoid the imposition of income or excise taxes on Digital Reality Trust, Inc., we are not permitted during any four consecutive fiscal quarters to make distributions with respect to common stock or other equity interests in an aggregate amount in excess of 95% of Funds From Operations, as defined in the credit agreement, for such period, subject to certain other adjustments. As of June 30, 2011, we were in compliance with all of such covenants.

During the three months ended June 30, 2011 and 2010, we capitalized interest of approximately $4.2 million and $2.5 million, respectively, and $8.9 million and $4.4 million during the six months ended June 30, 2011 and 2010, respectively.

Unsecured Senior Notes

Prudential Shelf Facility

On January 20, 2010, the Operating Partnership closed the sale of $100.0 million aggregate principal amount of its senior unsecured term notes to Prudential Investment Management, Inc. and certain of its affiliates, or, collectively, Prudential, pursuant to the Prudential shelf facility. The notes were issued in two series referred to as the series D and series E notes. The series D notes have a principal amount of $50.0 million, an interest-only rate of 4.57% per annum and a five-year maturity, and the series E notes have a principal amount of $50.0 million, an interest-only rate of 5.73% per annum and a seven-year maturity. On February 3, 2010, the Operating Partnership closed the sale of an additional $17.0 million aggregate principal amount of its senior unsecured term notes, which we refer to as the series F notes, to Prudential pursuant to the Prudential shelf facility. The series F notes have an interest-only rate of 4.50% per annum and a five-year maturity. We used the proceeds of the series D, series E and series F notes to fund acquisitions, to temporarily repay borrowings under our revolving credit facility, to fund working capital and for general corporate purposes. As of June 30, 2011 and December 31, 2010, there was $200.0 million of unsecured senior notes outstanding. On December 8, 2010, the Operating Partnership and Prudential entered into an amendment to the Note Purchase and Private Shelf Agreement, increasing the capacity of the Prudential shelf facility from $200.0 million to $250.0 million.

4.500% Notes due 2015

On July 8, 2010, the Operating Partnership issued $375.0 million aggregate principal amount of notes, maturing on July 15, 2015 with an interest rate of 4.500% per annum (the 2015 Notes). The purchase price paid by the initial purchasers was 99.697% of the principal amount. The 2015 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 2015 Notes is payable on January 15 and July 15 of each year, beginning on January 15, 2011. The net proceeds from the offering after deducting the original issue discount of approximately $1.1 million and underwriting commissions and expenses of approximately $3.1 million was approximately $370.8 million. We used the net proceeds from the offering to fund a portion of the purchase price of the 365 Main Portfolio. The 2015 Notes have been reflected net of discount in the condensed consolidated balance sheet.

The indenture governing the 2015 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At June 30, 2011, we were in compliance with each of these financial covenants.

We entered into a registration rights agreement whereby the Operating Partnership agreed to conduct an offer to exchange the 2015 Notes for a new series of publicly registered notes with substantially identical terms. If the Operating Partnership did not fulfill certain of its obligations under the registration rights agreement, it would have been required to pay liquidated damages to the holders of the 2015 Notes. No separate contingent obligation was recorded as no liquidated damages became probable. We filed a registration statement with the U.S. Securities and Exchange Commission in October 2010 in connection with the exchange offer, which was declared effective in December 2010. We completed the exchange offer on January 19, 2011.

5.875% Notes due 2020

On January 28, 2010, the Operating Partnership issued $500.0 million aggregate principal amount of notes, maturing on February 1, 2020 with an interest rate of 5.875% per annum (the 2020 Notes). The purchase price paid by the initial purchasers was 98.296% of the principal amount. The 2020 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 2020 Notes is payable on February 1 and August 1 of each year, beginning on August 1, 2010. The net proceeds from the offering after deducting the original issue discount of approximately $8.5 million and underwriting commissions and expenses of approximately $4.4 million was approximately $487.1 million. We used the net proceeds from the offering to temporarily repay our borrowings under our revolving credit facility, fund development and redevelopment opportunities and for general corporate purposes. The 2020 Notes have been reflected net of discount in the condensed consolidated balance sheet.

The indenture governing the 2020 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At June 30, 2011, we were in compliance with each of these financial covenants.

We entered into a registration rights agreement whereby the Operating Partnership agreed to conduct an offer to exchange the 2020 Notes for a new series of publicly registered notes with substantially identical terms. If the Operating Partnership did not fulfill certain of its obligations under the registration rights agreement, it would have been required to pay liquidated damages to the holders of the 2020 Notes. No separate contingent obligation was recorded as no liquidated damages became probable. We filed a registration statement with the U.S. Securities and Exchange Commission in June 2010 in connection with the exchange offer, which was declared effective in September 2010. We completed the exchange offer on November 5, 2010.

5.250% Notes due 2021

On March 8, 2011, the Operating Partnership issued $400.0 million aggregate principal amount of notes, maturing on March 15, 2021 with an interest rate of 5.250% per annum (the 2021 Notes). The purchase price paid by the initial purchasers was 99.775% of the principal amount. The 2021 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 2021 Notes is payable on March 15 and September 15 of each year, beginning on September 15, 2011. The net proceeds from the offering after deducting the original issue discount of approximately $0.9 million and underwriting commissions and expenses of approximately $3.6 million was approximately $395.5 million. We used the net proceeds from this offering to temporarily repay borrowings under our revolving credit facility, to acquire additional properties, to fund development and redevelopment opportunities and for general working capital purposes, including potentially for the repurchase, redemption or retirement of outstanding debt securities. The 2021 Notes have been reflected net of discount in the condensed consolidated balance sheet.

The indenture governing the 2021 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At June 30, 2011, we were in compliance with each of these financial covenants.

Exchangeable Senior Debentures

4.125% Exchangeable Senior Debentures due 2026

On August 15, 2006, the Operating Partnership issued $172.5 million of its 4.125% exchangeable senior debentures due August 15, 2026 (the 2026 Debentures). Costs incurred to issue the 2026 Debentures were approximately $5.4 million, net of the amount allocated to the equity component of the debentures. These costs are being amortized over a period of five years, which represents the estimated term of the 2026 Debentures, and are included in deferred financing costs, net in the condensed consolidated balance sheet. The 2026 Debentures are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc.

Interest is payable on August 15 and February 15 of each year beginning February 15, 2007 until the maturity date of August 15, 2026. The 2026 Debentures bear interest at 4.125% per annum and contain an exchange settlement feature, which provides that the 2026 Debentures may, under certain circumstances, be exchangeable for cash (up to the principal amount of the 2026 Debentures) and, with respect to any excess exchange value, into cash, shares of Digital Realty Trust, Inc. common stock or a combination of cash and shares of Digital Realty Trust, Inc. common stock at an exchange rate that was initially 30.6828 shares per $1,000 principal amount of 2026 Debentures. The exchange rate on the 2026 Debentures is subject to adjustment for certain events, including, but not limited to, certain dividends on Digital Realty Trust, Inc. common stock in excess of $0.265 per share per quarter (the "reference dividend"). Effective June 13, 2011, the exchange rate has been adjusted to 32.2730 shares per $1,000 principal amount of 2026 Debentures as a result of the aggregate dividends in excess of the reference dividend that Digital Realty Trust, Inc. declared and paid on its common stock beginning with the quarter ended December 31, 2006 and through the quarter ended June 30, 2011.

Prior to August 18, 2011, the Operating Partnership may not redeem the 2026 Debentures except to preserve Digital Realty Trust, Inc.'s status as a REIT for U.S. federal income tax purposes. On or after August 18, 2011, at the Operating Partnership's option, the 2026 Debentures are redeemable in cash in whole or in part at 100% of the principal amount plus unpaid interest, if any, accrued to, but excluding, the redemption date, upon at least 30 days' but not more than 60 days' prior written notice to holders of the 2026 Debentures.

The holders of the 2026 Debentures have the right to require the Operating Partnership to repurchase the 2026 Debentures in cash in whole or in part on each of August 15, 2011, August 15, 2016 and August 15, 2021, and in the event of a designated event, for a repurchase price equal to 100% of the principal amount of the 2026 Debentures plus unpaid interest, if any, accrued to, but excluding, the repurchase date. Designated events include certain merger or combination transactions, non-affiliates becoming the beneficial owner of more than 50% of the total voting power of Digital Realty Trust, Inc.'s capital stock, a substantial turnover of Digital Realty Trust, Inc.'s directors within a 12- month period and Digital Realty Trust, Inc. ceasing to be the general partner of the Operating Partnership. Certain events are considered "Events of Default," which may result in the accelerated maturity of the 2026 Debentures, including a default for 30 days in payment of any installment of interest under the 2026 Debentures, a default in the payment of the principal amount or any repurchase price or redemption price due with respect to the 2026 Debentures and the Operating Partnership's failure to deliver cash or any shares of Digital Realty Trust, Inc. common stock within 15 days after the due date upon an exchange of the 2026 Debentures, together with any cash due in lieu of fractional shares of common stock.

In addition, the 2026 Debentures are exchangeable (i) prior to July 15, 2026, during any fiscal quarter after the fiscal quarter ended September 30, 2006, if the closing sale price of Digital Realty Trust, Inc. common stock for 20 or more trading days in a period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter exceeds 130% of the exchange price in effect on the last trading day of the immediately preceding fiscal quarter, (ii) prior to July 15, 2026, during the five business day period after any five consecutive trading day period in which the average trading price per $1,000 principal amount of 2026 Debentures was equal to or less than 98% of the product of the closing sale price of the common stock during such period, multiplied by the applicable exchange rate, (iii) if we call the 2026 Debentures for redemption and (iv) any time on or after July 15, 2026. In April 2011, we gave notice to the holders of the 2026 Debentures that the 2026 Debentures shall be exchangeable during the calendar quarter ending June 30, 2011 pursuant to (i) above. The exchange price in effect as of June 30, 2011 was $30.99 per share.

We entered into a registration rights agreement whereby we agreed to register the shares of common stock which could be issued in the future upon exchange of the 2026 Debentures. If we do not fulfill certain of our obligations under the registration rights agreement, we will be required to pay liquidated damages to the holders of the 2026 Debentures. No separate contingent obligation has been recorded as no liquidated damages have become probable. We filed the shelf registration statement with the U.S. Securities and Exchange Commission in April 2007, which was automatically effective upon filing.

During the six months ended June 30, 2011, we exchanged approximately $40.5 million aggregate principal amount of our 2026 Debentures for a combination of cash (approximately $52.2 million) and 372,068 restricted shares of Digital Realty Trust, Inc. common stock at the request of holders pursuant to the terms of the indenture governing our 2026 Debentures. As of June 30, 2011, the remaining approximately $48.3 million face amount of the 2026 Debentures remains outstanding under the original terms. We recorded a loss on exchange of approximately $0.1 million and $1.5 million for the three months ended June 30, 2011 and 2010, respectively, and approximately $0.7 million and $1.5 million for the six months ended June 30, 2011 and 2010, respectively, determined based on the excess of the fair value of the 2026 Debentures at the exchange date over the carrying value of the exchanged 2026 Debentures along with a write off of a pro rata portion of the associated debt discount on the 2026 Debentures and deferred financing costs. This loss is reported as a loss on early extinguishment of debt in the condensed consolidated income statements.

The following table provides additional information about the 2026 Debentures as of the date presented pursuant to requirements under U.S. GAAP for convertible debt instruments that require the principal amount to be settled in cash upon conversion:

	4.125% Exchangeable Senior Debentures due 2026
($ and shares in thousands, except exchange price)	June 30, 2011			December 31, 2010
Carrying amount of the equity component	$	5,119		$	9,406
Principal amount of the liability component	$	48,301		$	88,758
Unamortized discount of the liability component	$	113		$	1,456
Net carrying amount of the liability component	$	48,188		$	87,302
Remaining amortization period of discount		1 month			7 months
Exchange price	$	30.99		$	31.42
Number of shares to be issued upon exchange (a)		777			1,103
The amount by which the if-exchanged value exceeds the principal amount (a)	$	48,003		$	56,828
Effective interest rate on liability component		6.75	%		6.75	%
Non-cash interest cost recognized for the period ended	$	1,117		$	2,067	(b)
Coupon rate interest cost recognized for the period ended	$	1,376		$	3,490	(b)

(a) In accordance with accounting guidance on convertible debt instruments that require the principal amount to be settled in cash upon conversion, we are required to disclose the exchange price and the number of shares on which the aggregate consideration to be delivered upon exchange is determined (principal plus excess value). The 2026 Debentures require the entire principal amount to be settled in cash, and at our option, any excess value above the principal amount may be settled in cash and/or common shares. Based on the June 30, 2011 and December 31, 2010 closing share prices of Digital Realty Trust, Inc. common stock and the exchange prices in the table above, the excess value was approximately $48.0 million and $56.8 million, respectively; accordingly, approximately 0.8 million and 1.1 million common shares, respectively, would be issued if the 2026 Debentures were settled on these dates and we elected to settle the excess value in shares of Digital Realty Trust, Inc. common stock.

(b) Amounts are for the six months ended June 30, 2010.

5.50% Exchangeable Senior Debentures due 2029

On April 20, 2009, the Operating Partnership issued $266.4 million of its 5.50% exchangeable senior debentures due April 15, 2029 (the 2029 Debentures). Costs incurred to issue the 2029 Debentures were approximately $7.8 million. These costs are being amortized over a period of five years, which represents the estimated term of the 2029 Debentures, and are included in deferred financing costs, net in the condensed consolidated balance sheet. The 2029 Debentures are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc.

Interest is payable on October 15 and April 15 of each year beginning October 15, 2009 until the maturity date of April 15, 2029. The 2029 Debentures bear interest at 5.50% per annum and may be exchanged for shares of Digital Realty Trust, Inc. common stock at an exchange rate that was initially 23.2558 shares per $1,000 principal amount of 2029 Debentures. The exchange rate on the 2029 Debentures is subject to adjustment for certain events, including, but not limited to, certain dividends on Digital Realty Trust, Inc. common stock in excess of $0.33 per share per quarter (the "reference dividend"). Effective June 13, 2011, the exchange rate has been adjusted to 23.9050 shares per $1,000 principal amount of 2029 Debentures as a result of the aggregate dividends in excess of the reference dividend that Digital Realty Trust, Inc. declared and paid on its common stock beginning with the quarter ended June 30, 2009 and through the quarter ended June 30, 2011. Due to the fact that the exchange feature for the 2029 Debentures must be settled in the common stock of Digital Realty Trust, Inc., new accounting guidance on convertible debt instruments that requires the principal amount to be settled in cash upon conversion does not apply.

Prior to April 18, 2014, the Operating Partnership may not redeem the 2029 Debentures except to preserve Digital Realty Trust, Inc.'s status as a REIT for U.S. federal income tax purposes. On or after April 18, 2014, at the Operating Partnership's option, the 2029 Debentures are redeemable in cash in whole or in part at 100% of the principal amount plus unpaid interest, if any, accrued to, but excluding, the redemption date, upon at least 30 days' but not more than 60 days' prior written notice to holders of the 2029 Debentures.

The holders of the 2029 Debentures have the right to require the Operating Partnership to repurchase the 2029 Debentures in cash in whole or in part on each of April 15, 2014, April 15, 2019 and April 15, 2024, and in the event of a designated event, for a repurchase price equal to 100% of the principal amount of the 2029 Debentures plus unpaid interest, if any, accrued to, but excluding, the repurchase date. Designated events include certain merger or combination transactions, non-affiliates becoming the beneficial owner of more than 50% of the total voting power of Digital Realty Trust, Inc.'s capital stock, a substantial turnover of Digital Realty Trust, Inc.'s directors within a 12-month period without the approval of existing members and Digital Realty Trust, Inc. ceasing to be the general partner of the Operating Partnership. Certain events are considered "Events of Default," which may result in the accelerated maturity of the 2029 Debentures, including a default for 30 days in payment of any installment of interest under the 2029 Debentures, a default in the payment of the principal amount or any repurchase price or redemption price due with respect to the 2029 Debentures and the Operating Partnership's failure to deliver shares of Digital Realty Trust, Inc. common stock within 15 days after the due date upon an exchange of the 2029 Debentures, together with any cash due in lieu of fractional shares of common stock.

We entered into a registration rights agreement whereby we must register the shares of common stock which could be issued in the future upon exchange of the 2029 Debentures. If we do not fulfill certain of our obligations under the registration rights agreement, we will be required to pay liquidated damages to the holders of the 2029 Debentures. No separate contingent obligation has been recorded as no liquidated damages have become probable. We filed the shelf registration statement with the U.S. Securities and Exchange Commission in December 2009, which was automatically effective upon filing.

The table below summarizes our debt maturities and principal payments as of June 30, 2011 (in thousands):

	Revolving Credit Facility (1)		Unsecured Senior Notes		Senior Notes			Exchangeable Senior Debentures			Mortgage Loans (2)		Other Secured Loan		Total Debt
Remainder of 2011	$	341,417	$	25,000	$	—		$	48,301	(3)	$	7,607	$	—	$	422,325
2012		—		—		—			—			164,743		—		164,743
2013		—		33,000		—			—			160,583		10,500		204,083
2014		—		—		—			266,400	(4)		220,996		—		487,396
2015		—		67,000		375,000			—			75,436		—		517,436
Thereafter		—		75,000		900,000			—			305,098		—		1,280,098
Subtotal	$	341,417	$	200,000	$	1,275,000		$	314,701		$	934,463	$	10,500	$	3,076,081
Unamortized discount		—		—		(9,413	)		(113	)		—		—		(9,526	)
Unamortized premium		—		—		—			—			1,022		—		1,022
Total	$	341,417	$	200,000	$	1,265,587		$	314,588		$	935,485	$	10,500	$	3,067,577

⁽¹⁾ Subject to a one-year extension option exercisable by us. The bank group is obligated to grant the extension option provided we give proper notice, we make certain representations and warranties and no default exists under the revolving credit facility.

⁽²⁾ Our mortgage loans are generally non-recourse to us, subject to carve outs for specified actions by us or specified undisclosed environmental liabilities. As of June 30, 2011, we had provided limited recourse guarantees with respect to approximately $60.1 million principal amount of the outstanding mortgage indebtedness, and partial letter of credit support with respect to approximately an additional $47.3 million of the outstanding mortgage indebtedness.

⁽³⁾ Assumes maturity of the 2026 Debentures at first redemption date in August 2011.

⁽⁴⁾ Assumes maturity of the 2029 Debentures at first redemption date in April 2014.

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Capital and Comprehensive Income (Digital Realty Trust, L.P. [Member])

6 Months Ended

Jun. 30, 2011

Digital Realty Trust, L.P. [Member]

Capital and Comprehensive Income

11. Capital and Comprehensive Income

(a) Allocations of Net Income and Net Losses to Partners

Except for special allocations to holders of profits interest units described below in note 12(a) under the heading "Incentive Plans-Long-Term Incentive Units," the Operating Partnership's net income will generally be allocated to Digital Realty Trust, Inc. (the General Partner) to the extent of the accrued preferred return on its preferred units, and then to the General Partner and the Operating Partnership's limited partners in accordance with the respective percentage interests in the common units issued by the Operating Partnership. Net loss will generally be allocated to the General Partner and the Operating Partnership's limited partners in accordance with the respective common percentage interests in the Operating Partnership until the limited partner's capital is reduced to zero and any remaining net loss would be allocated to the General Partner. However, in some cases, losses may be disproportionately allocated to partners who have guaranteed our debt. The allocations described above are subject to special allocations relating to depreciation deductions and to compliance with the provisions of Sections 704(b) and 704(c) of the Code, and the associated Treasury Regulations.

(b) Partnership Units

Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of the General Partner's common stock at the time of redemption. Alternatively, the General Partner may elect to acquire those common units in exchange for shares of the General Partner's common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, the Operating Partnership evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the limited partners' common units and the vested incentive units. Based on the results of this analysis, the Operating Partnership concluded that the common and vested incentive Operating Partnership units met the criteria to be classified within capital.

The redemption value of the limited partners' common units and the vested incentive units was approximately $272.0 million and $244.5 million based on the closing market price of Digital Realty Trust, Inc.'s common stock on June 30, 2011 and December 31, 2010, respectively.

(c) Distributions

All distributions on our units are at the discretion of Digital Realty Trust, Inc.'s board of directors. As of June 30, 2011, the Operating Partnership declared the following distributions (in thousands):

Date distribution declared	Distribution payable date		Series C Preferred Units (1)		Series D Preferred Units (2)		Common Units  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	66,252
April 25, 2011		June 30, 2011	$	1,441	$	3,272	$	70,577
			$	3,273	$	7,962	$	136,829

(1) $1.094 annual rate of distribution per unit.

(2) $1.375 annual rate of distribution per unit.

(3) $2.720 annual rate of distribution per unit.

(d) Accumulated Other Comprehensive Loss

The accumulated balances for each classification of other comprehensive loss as of June 30, 2011 are as follows (in thousands):

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance as of December 31, 2010	$	(36,051	)	$	(9,809	)	$	(45,860	)
Net current period change		25,037			(947	)		24,090
Reclassification to interest expense from interest rate swaps		—			3,174			3,174
Balance as of June 30, 2011	$	(11,014	)	$	(7,582	)	$	(18,596	)

(e) Noncontrolling Interests in Consolidated Joint Ventures

On June 24, 2011, we acquired all of the noncontrolling ownership interest in the entity that owns Datacenter Park Dallas from our joint venture partner for approximately $53.2 million (subject to adjustment in limited circumstances). The acquisition was financed with borrowings under our revolving credit facility. The amount paid in excess of the carrying value of the noncontrolling ownership interest resulted in a decrease to general partner common capital as presented in the accompanying condensed consolidated statement of capital.

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Incentive Plan (Stock Options) (Narrative) (Details) (Stock Options [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Stock Options [Member]
Stock option expense	$ 0.2	$ 0.2	$ 0.4	$ 0.5
Capitalized expense related to construction and leasing activities	0.1	0.1	0.1	0.1
Unearned compensation due to the unvested portion of Class C Profits Interest Units			$ 0.8		$ 1.3
Period of recognition of unearned compensation (years)			0.7

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Income per Share

6 Months Ended

Jun. 30, 2011

Income per Share

Income per Share

7. Income per Share

The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Net income available to common stockholders	$	31,990	$	9,091	$	62,970	$	23,835
Weighted average shares outstanding—basic		96,295,585		80,542,329		93,875,415		79,164,167
Potentially dilutive common shares:
Stock options		203,078		225,931		193,985		206,803
Class C Units (2007 Grant)		73,855		154,229		67,856		142,747
Unvested incentive units		180,377		179,267		152,927		155,504
Excess exchange value of the 2026 Debentures		758,916		1,920,061		722,782		1,781,415
Weighted average shares outstanding—diluted		97,511,811		83,021,817		95,012,965		81,450,636
Income per share:
Basic	$	0.33	$	0.11	$	0.67	$	0.30
Diluted	$	0.33	$	0.11	$	0.66	$	0.29

On or after July 15, 2026, the 2026 Debentures may be exchanged at the then-applicable exchange rate for cash (up to the principal amount of the 2026 Debentures) and, with respect to any excess exchange value, into cash, shares of Digital Realty Trust, Inc. common stock or a combination of cash and shares of Digital Realty Trust, Inc. common stock. The 2026 Debentures are also exchangeable prior to July 15, 2026, but only upon the occurrence of certain specified events. During the three and six months ended June 30, 2011, the weighted average common stock price exceeded the strike price as of June 30, 2011 of $30.99. Therefore, using the treasury method, 758,916 and 722,782 shares of common stock contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common shares in determining diluted earnings per share for the three and six months ended June 30, 2011, respectively. During the three and six months ended June 30, 2010, the weighted average common stock price exceeded the strike price as of June 30, 2010 of $31.84. Therefore, using the treasury method, 1,920,061 and 1,781,415 shares of common stock contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common shares in determining diluted earnings per share for the three and six months ended June 30, 2010, respectively.

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Weighted average of Operating Partnership common units not owned by us		4,760,802		4,964,417		4,823,553		4,874,406
Potentially dilutive outstanding stock options		—		—		—		5,346
Potentially dilutive 2029 Debentures		6,289,434		6,195,345		6,279,766		6,195,345
Potentially dilutive Series C Cumulative Convertible Preferred Stock		2,864,660		3,657,477		3,256,316		3,657,477
Potentially dilutive Series D Cumulative Convertible Preferred Stock		6,418,585		8,237,540		7,370,713		8,226,381
		20,333,481		23,054,779		21,730,348		22,958,955

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Equity and Accumulated Other Comprehensive Loss, Net (Tables)

6 Months Ended

Jun. 30, 2011

Equity and Accumulated Other Comprehensive Loss, Net

Ownership Interest in the Operating Partnership

	June 30, 2011					December 31, 2010
	Number of units		Percentage of total			Number of units		Percentage of total
Digital Realty Trust, Inc.		98,754,727		95.1	%		91,159,221		94.3	%
Noncontrolling interests consist of:
Common units held by third parties		3,430,814		3.3			3,937,827		4.1
Incentive units held by employees and directors (see note 12)		1,604,032		1.6			1,525,622		1.6
		103,789,573		100.0	%		96,622,670		100.0	%

Summary of Activity in Noncontrolling Interest in the Operating Partnership

	Common Units			Incentive Units			Total
As of December 31, 2010		3,937,827			1,525,622			5,463,449
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1)		(507,013	)		—			(507,013	)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1)		—			(51,957	)		(51,957	)
Cancellation of incentive units held by employees and directors		—			(53,138	)		(53,138	)
Grant of incentive units to employees and directors		—			183,505			183,505
As of June 30, 2011		3,430,814			1,604,032			5,034,846

(1) This redemption was recorded as a reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital based on the book value per unit in the accompanying condensed consolidated balance sheet of Digital Realty Trust, Inc.

Schedule of Dividends Declared and Payable

(c) Dividends

We have declared the following dividends on our common and preferred stock for the six months ended June 30, 2011 (in thousands):

Date dividend declared	Dividend payable date		Series C Preferred Stock (1)		Series D Preferred Stock (2)		Common Stock  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	62,459
April 25, 2011		June 30, 2011	$	1,441	$	3,272	$	67,031
			$	3,273	$	7,962	$	129,490

(1) $1.094 annual rate of dividend per share.

(2) $1.375 annual rate of dividend per share.

(3) $2.720 annual rate of dividend per share.

Schedule of Accumulated Other Comprehensive Income

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss, net
Balance as of December 31, 2010	$	(33,175	)	$	(8,906	)	$	(42,081	)
Net current period change		23,800			(907	)		22,893
Reclassification to interest expense from interest rate swaps		—			3,019			3,019
Balance as of June 30, 2011	$	(9,375	)	$	(6,794	)	$	(16,169	)

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Debt of the Company

6 Months Ended

Jun. 30, 2011

Debt of the Company

Debt of the Company

5. Debt of the Company

In this Note 5, the "Company" refers only to Digital Realty Trust, Inc. and not to any of its subsidiaries.

The Company itself does not have any indebtedness. All debt is held directly or indirectly by the Operating Partnership.

Guarantee of Debt

The Company has guaranteed some of the Operating Partnership's debt. The Company guarantees the Operating Partnership's obligations with respect to the 2026 Debentures, the 2029 Debentures, the 2015 Notes, the 2020 Notes, the 2021 Notes (each, as defined in Note 6) and its unsecured senior notes sold to Prudential (as defined in Note 6) pursuant to the Prudential shelf facility. The Company is also the guarantor of the Operating Partnership's obligations under its revolving credit facility.

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Debt of the Operating Partnership (Mortgage Loans) (Details)														6 Months Ended		12 Months Ended		6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended		6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended			6 Months Ended				6 Months Ended				6 Months Ended				6 Months Ended					6 Months Ended					6 Months Ended				6 Months Ended
	Jun. 30, 2011 USD ($)	Dec. 31, 2010 USD ($)	Jun. 30, 2011 Euro [Member]	Dec. 31, 2010 Euro [Member]	Jun. 30, 2011 Euro [Member] Mortgage Loans [Member]	Dec. 31, 2010 Euro [Member] Mortgage Loans [Member]	Jun. 30, 2011 British Sterling [Member]	Dec. 31, 2010 British Sterling [Member]	Jun. 30, 2011 British Sterling [Member] Mortgage Loans [Member]	Dec. 31, 2010 British Sterling [Member] Mortgage Loans [Member]	Jun. 30, 2011 Mortgage Loans [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] USD ($)	Jun. 30, 2011 Mortgage Loans [Member] Secured Term Debt [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] Secured Term Debt [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 3 Corporate Place [Member]		Dec. 31, 2010 Mortgage Loans [Member] 3 Corporate Place [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 200 Paul Avenue 1-4 [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] 200 Paul Avenue 1-4 [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 2045 & 2055 LaFayette Street [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] 2045 & 2055 LaFayette Street [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] Mundells Roundabout [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] Mundells Roundabout [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 600 West Seventh Street [Member] USD ($)	Dec. 31, 2010 Mortgage Loans [Member] 600 West Seventh Street [Member] USD ($)	Jun. 30, 2011 Mortgage Loans [Member] 34551 Ardenwood Boulevard 1-4 [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] 34551 Ardenwood Boulevard 1-4 [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 1100 Space Park Drive [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] 1100 Space Park Drive [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 1350 Duane Avenue/3080 Raymond Street [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] 1350 Duane Avenue/3080 Raymond Street [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 150 South First Street [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] 150 South First Street [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 114 Rue Ambroise Croizat [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] 114 Rue Ambroise Croizat [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] Clonshaugh Industrial Estate II [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] Clonshaugh Industrial Estate II [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 1500 Space Park Drive [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] 1500 Space Park Drive [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 2334 Lundy Place [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] 2334 Lundy Place [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] Unit 9, Blanchardstown Corporate Park [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] Unit 9, Blanchardstown Corporate Park [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] Cressex 1 [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] Cressex 1 [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 6 Braham Street [Member]		Dec. 31, 2010 Mortgage Loans [Member] 6 Braham Street [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 1201 Comstock Street [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] 1201 Comstock Street [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] Datacenter Park Dallas [Member]		Dec. 31, 2010 Mortgage Loans [Member] Datacenter Park Dallas [Member] USD ($)	Jun. 30, 2011 Mortgage Loans [Member] Paul van Vlissingenstraat 16 [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] Paul van Vlissingenstraat 16 [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] Chemin de l'Epinglier 2 [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] Chemin de l'Epinglier 2 [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 800 Central Expressway [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] 800 Central Expressway [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] Gyroscoopweg 2E-2F [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] Gyroscoopweg 2E-2F [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] Gyroscoopweg 2E-2F [Member] EUR (€)	Jun. 30, 2011 Mortgage Loans [Member] 1125 Energy Park Drive [Member] USD ($)		Mar. 01, 2012 Mortgage Loans [Member] 1125 Energy Park Drive [Member]	Dec. 31, 2010 Mortgage Loans [Member] 1125 Energy Park Drive [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] Manchester Technopark [Member] USD ($)		Dec. 31, 2010 Mortgage Loans [Member] Manchester Technopark [Member] USD ($)		Jun. 30, 2011 Mortgage Loans [Member] 731 East Trade Street [Member] USD ($)	Dec. 31, 2010 Mortgage Loans [Member] 731 East Trade Street [Member] USD ($)
Interest Rate at June 30, 2011														5.65%	[1],[2]			6.72%	[1],[3]			5.74%	[1]			5.93%	[1]							5.80%		5.95%	[1]			5.89%	[1]			5.42%	[1]			6.30%	[1]											6.15%	[1]			5.96%	[1]							5.68%	[4]											5.00%																				7.62%	[5]	9.62%			5.68%	[4]			8.22%
Variable Rate Basis																														3-month GBP LIBOR + 1.20%	[6]																					3-month EURIBOR + 1.35%	[6]			3-month EURIBOR + 4.50%	[6]											3-month EURIBOR + 1.35%	[6]							3-month GBP LIBOR + 0.90%	[6]			1-month LIBOR + 3.50%	[6]						3-month EURIBOR + 1.60%	[6]			3-month EURIBOR + 1.50%	[6]			1-month LIBOR + 4.75%	[6]			3-month EURIBOR + 1.50%	[6]
Maturity Date														Nov. 11, 2014	[1],[2]			Aug. 01, 2011	[7]			Oct. 08, 2015	[1]			Feb. 06, 2017	[1]			Nov. 30, 2013				Mar. 15, 2016		Nov. 11, 2016	[1]			Dec. 11, 2016	[1]			Oct. 01, 2012	[1]			Feb. 06, 2017	[1]			Jan. 18, 2012				Sep. 04, 2014	[3]			Oct. 05, 2013	[1]			Nov. 11, 2016	[1]			Jan. 18, 2012				Oct. 16, 2014	[4]			Apr. 10, 2011	[3]			Jun. 24, 2012	[8]			Sep. 15, 2011	[8]		Jul. 18, 2013				Jul. 18, 2013				Jun. 09, 2013	[1]			Oct. 18, 2013	[4]				Mar. 01, 2032	[1]				Oct. 16, 2014	[4]			Jul. 01, 2020
Unamortized premium	$ 1,022,000										$ 1,022,000	[9]	$ 1,101,000
Mortgage loans, net of premiums	935,485,000	1,043,188,000									935,485,000	[9]	1,043,188,000	140,186,000	[1],[2]	141,465,000	[1],[2]			80,000,000	[1],[3]	75,325,000	[1]	76,179,000	[1]	65,995,000	[1]	66,437,000	[1]	68,747,000	[10]	66,858,000	[10]	53,443,000	54,157,000	53,967,000	[1]	54,306,000	[1]	53,954,000	[1]	54,296,000	[1]	52,800,000	[1]	52,800,000	[1]	51,832,000	[1]	52,154,000	[1]	44,534,000	[11]	41,430,000	[11]	43,506,000	[11],[3]	40,152,000	[11],[3]	38,921,000	[1]	39,941,000	[1]	39,250,000	[1]	39,496,000	[1]	38,289,000	[11]	35,620,000	[11]	28,944,000	[10],[4]	28,388,000	[10],[4]			19,515,000	[10],[3]	16,576,000	[1],[3]	16,976,000	[1],[3]			16,150,000	15,024,000	[11]	13,978,000	[11]	10,870,000	[11]	10,113,000	[11]	10,000,000	[1]	10,000,000	[1]	9,566,000	[11],[4]	8,900,000	[11],[4]		8,983,000	[1]		9,060,000	[1]	8,805,000	[10],[4]	8,636,000	[10],[4]	4,946,000	5,080,000
Mortgage loans on real estate, number																6
Exchange rate			1.45	1.34	1.45	1.34	1.61	1.56	1.61	1.56
Letter of credit security amount																																																																																																							€ 1,300,000

[1] The respective borrower's assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person.

[2] This amount represents six mortgage loans secured by our interests in 36 NE 2nd Street, 3300 East Birch Street, 100 & 200 Quannapowitt Parkway, 300 Boulevard East, 4849 Alpha Road, and 11830 Webb Chapel Road. Each of these loans is cross-collateralized by the six properties.

[3] The Operating Partnership or its subsidiary provides a limited recourse guarantee with respect to this loan.

[4] These loans are also secured by a £7.8 million letter of credit. These loans are cross-collateralized by the two properties.

[5] If the loan is not repaid by March 1, 2012, the interest rate increases to the greater of 9.62% or the treasury rate then in effect plus 2%. Subject to a prepayment lock-out period through December 2011.

[6] We have entered into interest rate swap or interest rate cap agreements as a cash flow hedge for interest generated by these US LIBOR, EURIBOR and GBP LIBOR based loans. See note 13 for further information.

[7] Two one-year extensions are available, which we may exercise if certain conditions are met.

[8] A one-year extension is available, which we may exercise if certain conditions are met.

[9] Our mortgage loans are generally non-recourse to us, subject to carve outs for specified actions by us or specified undisclosed environmental liabilities. As of June 30, 2011, we had provided limited recourse guarantees with respect to approximately $60.1 million principal amount of the outstanding mortgage indebtedness, and partial letter of credit support with respect to approximately an additional $47.3 million of the outstanding mortgage indebtedness.

[10] Based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

[11] Based on exchange rate of $1.45 to €1.00 as of June 30, 2011 and $1.34 to €1.00 as of December 31, 2010.

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Condensed Consolidated Statement of Capital (USD $) In Thousands, except Share data	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011
Balance		$ 2,054,663
Conversion of limited partner common units to general partner common units		6,434
Net proceeds from issuance of common units		176,266
Issuance of common units in connection with the exercise of stock options		3,053
Issuance of common stock in exchange for debentures		(11,441)
Amortization of unearned compensation regarding share based awards		8,031
Distributions		(148,064)
Purchase of noncontrolling interests of a consolidated joint venture		(53,240)
Contributions from noncontrolling interest in consolidated joint ventures		42
Net income	38,228	77,240
Other comprehensive income - foreign currency translation adjustments	8,631	25,037
Other comprehensive income - fair value of interest rate swaps	(2,453)	(947)
Other comprehensive income - reclassification of accumulated other comprehensive loss to interest expense	1,589	3,174
Balance	2,133,814	2,133,814
Digital Realty Trust, L.P. [Member] | General Partner [Member] | Preferred Units [Member]
Balance		502,341
Balance (units)		20,787,255
Conversion of preferred units		(144,955)
Conversion of preferred units (units)		(5,998,695)
Distributions		(11,235)
Net income		11,235
Balance	357,386	357,386
Balance (units)	14,788,560	14,788,560
Digital Realty Trust, L.P. [Member] | General Partner [Member] | Common Units [Member]
Balance		1,502,258
Balance (units)		91,159,221
Conversion of limited partner common units to general partner common units		6,434
Conversion of limited partner common units to general partner common units (units)		558,970
Issuance of restricted common units, net of forfeitures (units)		79,848
Net proceeds from issuance of common units		176,266
Net proceeds from issuance of common units (units)		2,967,545
Issuance of common units in connection with the exercise of stock options		3,053
Issuance of common units in connection with the exercise of stock options (units)		80,303
Issuance of common stock in exchange for debentures		(11,441)
Issuance of common stock in exchange for debentures (shares/units)		372,068
Conversion of preferred units		144,955
Conversion of preferred units (units)		3,536,772
Amortization of unearned compensation regarding share based awards		8,031
Reclassification of vested share based awards		(6,381)
Distributions		(129,490)
Purchase of noncontrolling interests of a consolidated joint venture		(26,720)
Net income		62,970
Balance	1,729,935	1,729,935
Balance (units)	98,754,727	98,754,727
Digital Realty Trust, L.P. [Member] | Limited Partner [Member] | Common Units [Member]
Balance		56,215
Balance (units)		5,463,449
Conversion of limited partner common units to general partner common units		(6,434)
Conversion of limited partner common units to general partner common units (units)		(558,970)
Issuance of common units, net of forfeitures (units)		130,367
Reclassification of vested share based awards		6,381
Distributions		(7,339)
Net income		3,234
Balance	52,057	52,057
Balance (units)	5,034,846	5,034,846
Digital Realty Trust, L.P. [Member] | Accumulated Other Comprehensive Loss, net [Member]
Balance		(45,860)
Other comprehensive income - foreign currency translation adjustments		25,037
Other comprehensive income - fair value of interest rate swaps		(947)
Other comprehensive income - reclassification of accumulated other comprehensive loss to interest expense		3,174
Balance	(18,596)	(18,596)
Digital Realty Trust, L.P. [Member] | Noncontrolling Interests in Consolidated Joint Ventures [Member]
Balance		39,709
Purchase of noncontrolling interests of a consolidated joint venture		(26,520)
Contributions from noncontrolling interest in consolidated joint ventures		42
Net income		(199)
Balance	13,032	13,032
Digital Realty Trust, L.P. [Member]
Balance		2,054,663
Conversion of limited partner common units to general partner common units		6,434
Purchase of noncontrolling interests of a consolidated joint venture		(53,240)
Net income	38,228	77,240
Other comprehensive income - foreign currency translation adjustments	8,631	25,037
Other comprehensive income - fair value of interest rate swaps	(2,453)	(947)
Other comprehensive income - reclassification of accumulated other comprehensive loss to interest expense	1,589	3,174
Balance	$ 2,133,814	$ 2,133,814

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Organization and Description of Business

6 Months Ended

Jun. 30, 2011

Organization and Description of Business

Organization and Description of Business

1. Organization and Description of Business

Digital Realty Trust, Inc. through its controlling interest in Digital Realty Trust, L.P. (the Operating Partnership) and the subsidiaries of the Operating Partnership (collectively, we, our, us or the Company) is engaged in the business of owning, acquiring, developing, redeveloping and managing technology-related real estate. The Company is focused on providing Turn-Key Datacenter^® and Powered Base Building^® datacenter solutions for domestic and international tenants across a variety of industry verticals ranging from information technology and Internet enterprises, to manufacturing and financial services. As of June 30, 2011, our portfolio consisted of 96 properties, excluding two properties held as investments in unconsolidated joint ventures, of which 81 are located throughout North America, 14 are located in Europe and one is located in Asia. Our properties are diversified in major markets where corporate datacenter and technology tenants are concentrated, including the Boston, Chicago, Dallas, Los Angeles, New York Metro, Northern Virginia, Phoenix, San Francisco and Silicon Valley metropolitan areas in the U.S., the Amsterdam, Dublin, London and Paris markets in Europe and Singapore in Asia. The portfolio consists of Internet gateway and corporate datacenter properties, technology manufacturing properties and regional or national headquarters of technology companies.

The Operating Partnership was formed on July 21, 2004 in anticipation of our initial public offering (IPO) on November 3, 2004 and commenced operations on that date. As of June 30, 2011, we own a 95.1% common interest and a 100% preferred interest in the Operating Partnership. As sole general partner, we have control over the Operating Partnership. The limited partners of the Operating Partnership do not have rights to replace us as the general partner nor do they have participating rights, although they do have certain protective rights.

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Acquisitions (Schedule of Real Estate Property Acquisitions) (Details) (Northern Virginia, Loudoun Parkway North [Member], USD $) In Millions	6 Months Ended
	Jun. 30, 2011
Northern Virginia, Loudoun Parkway North [Member]
Acquisition, Date Acquired	April 15, 2011	[1]
Acquisition, Amount	$ 17.3	[1]

[1] (1) Represents vacant land which is not included in our operating property count.

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Income per Unit (Tables)

6 Months Ended

Jun. 30, 2011

Summary of Basic and Diluted Earnings per Share

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Net income available to common stockholders	$	31,990	$	9,091	$	62,970	$	23,835
Weighted average shares outstanding—basic		96,295,585		80,542,329		93,875,415		79,164,167
Potentially dilutive common shares:
Stock options		203,078		225,931		193,985		206,803
Class C Units (2007 Grant)		73,855		154,229		67,856		142,747
Unvested incentive units		180,377		179,267		152,927		155,504
Excess exchange value of the 2026 Debentures		758,916		1,920,061		722,782		1,781,415
Weighted average shares outstanding—diluted		97,511,811		83,021,817		95,012,965		81,450,636
Income per share:
Basic	$	0.33	$	0.11	$	0.67	$	0.30
Diluted	$	0.33	$	0.11	$	0.66	$	0.29

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Weighted average of Operating Partnership common units not owned by us		4,760,802		4,964,417		4,823,553		4,874,406
Potentially dilutive outstanding stock options		—		—		—		5,346
Potentially dilutive 2029 Debentures		6,289,434		6,195,345		6,279,766		6,195,345
Potentially dilutive Series C Cumulative Convertible Preferred Stock		2,864,660		3,657,477		3,256,316		3,657,477
Potentially dilutive Series D Cumulative Convertible Preferred Stock		6,418,585		8,237,540		7,370,713		8,226,381
		20,333,481		23,054,779		21,730,348		22,958,955

Digital Realty Trust, L.P. [Member]

Summary of Basic and Diluted Earnings per Share

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Net income available to common unitholders	$	33,572	$	9,651	$	66,204	$	25,368
Weighted average units outstanding—basic		101,056,387		86,149,647		98,698,968		84,699,431
Potentially dilutive common units:
Stock options		203,078		225,931		193,985		206,803
Class C Units (2007 Grant)		73,855		154,229		67,856		142,747
Unvested incentive units		180,377		179,267		152,927		155,504
Excess exchange value of the 2026 Debentures		758,916		1,920,061		722,782		1,781,415
Weighted average units outstanding—diluted		102,272,613		88,629,135		99,836,518		86,985,900
Income per unit:
Basic	$	0.33	$	0.11	$	0.67	$	0.30
Diluted	$	0.33	$	0.11	$	0.66	$	0.29

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Potentially dilutive outstanding stock options		—		—		—		5,346
Potentially dilutive 2029 Debentures		6,289,434		6,195,345		6,279,766		6,195,345
Potentially dilutive Series C Cumulative Convertible Preferred Units		2,864,660		3,657,477		3,256,316		3,657,477
Potentially dilutive Series D Cumulative Convertible Preferred Units		6,418,585		8,237,540		7,370,713		8,226,381
		15,572,679		18,090,362		16,906,795		18,084,549

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Income per Unit (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Strike price	$ 30.99	$ 31.84	$ 30.99	$ 31.84
Shares of common stock contingently issuable	758,916	1,920,061	722,782	1,781,415
Digital Realty Trust, L.P. [Member]
Strike price	$ 30.99	$ 31.84	$ 30.99	$ 31.84
Shares of common stock contingently issuable	758,916	1,920,061	722,782	1,781,415

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Income per Unit (Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Potentially dilutive securities	20,333,481	23,054,779	21,730,348	22,958,955
Potentially Dilutive Outstanding Stock Options [Member]
Potentially dilutive securities				5,346
Potentially Dilutive 2029 Debentures [Member]
Potentially dilutive securities	6,289,434	6,195,345	6,279,766	6,195,345
Potentially Dilutive Series C Cumulative Convertible Preferred Stock/Units [Member]
Potentially dilutive securities	2,864,660	3,657,477	3,256,316	3,657,477
Potentially Dilutive Series D Cumulative Convertible Preferred Stock/Units [Member]
Potentially dilutive securities	6,418,585	8,237,540	7,370,713	8,226,381
Digital Realty Trust, L.P. [Member]
Potentially dilutive securities	15,572,679	18,090,362	16,906,795	18,084,549

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Debt of the Operating Partnership (Exchangeable Senior Debentures) (4.125 Table) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2011		Dec. 31, 2010
Principal amount of the liability component	$ 3,076,081
Unamortized discount of the liability component	9,526
4.125% Exchangeable Senior Debentures due 2026 [Member]
Carrying amount of the equity component	5,119		9,406
Principal amount of the liability component	48,301		88,758
Unamortized discount of the liability component	113		1,456
Net carrying amount of the liability component	48,188		87,302
Remaining amortization period of discount (months)	1		7
Exchange price	$ 30.99		$ 31.42
Number of shares to be issued upon exchange	777	[1]	1,103	[1]
The amount by which the if-exchanged value exceeds the principal amount	48,003	[1]	56,828	[1]
Effective interest rate on liability component	6.75%		6.75%
Non-cash interest cost recognized for the year ended	1,117		2,067	[2]
Coupon rate interest cost recognized for the year ended	$ 1,376		$ 3,490	[2]

[1] In accordance with accounting guidance on convertible debt instruments that require the principal amount to be settled in cash upon conversion, we are required to disclose the exchange price and the number of shares on which the aggregate consideration to be delivered upon exchange is determined (principal plus excess value). The 2026 Debentures require the entire principal amount to be settled in cash, and at our option, any excess value above the principal amount may be settled in cash and/or common shares. Based on the June 30, 2011 and December 31, 2010 closing share prices of Digital Realty Trust, Inc. common stock and the exchange prices in the table above, the excess value was approximately $48.0 million and $56.8 million, respectively; accordingly, approximately 0.8 million and 1.1 million common shares, respectively, would be issued if the 2026 Debentures were settled on these dates and we elected to settle the excess value in shares of Digital Realty Trust, Inc. common stock.

[2] Amounts are for the six months ended June 30, 2010.

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Equity and Accumulated Other Comprehensive Loss, Net (Summary of Activity in Noncontrolling Interest in the Operating Partnership) (Details)	6 Months Ended
	Jun. 30, 2011
As of December 31	5,463,449
Redemption of common units for shares of our common stock	(507,013)	[1]
Conversion of incentive units held by employees and directors for shares of our common stock	(51,957)	[1]
Cancellation of incentive units held by employees and directors	(53,138)
Grant of incentive units to employees and directors	183,505
As of June 30	5,034,846
Common Units [Member]
As of December 31	3,937,827
Redemption of common units for shares of our common stock	(507,013)	[1]
Conversion of incentive units held by employees and directors for shares of our common stock		[1]
Grant of incentive units to employees and directors
As of June 30	3,430,814
Incentive Units [Member]
As of December 31	1,525,622
Conversion of incentive units held by employees and directors for shares of our common stock	(51,957)	[1]
Cancellation of incentive units held by employees and directors	(53,138)
Grant of incentive units to employees and directors	183,505
As of June 30	1,604,032

[1] This redemption was recorded as a reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital based on the book value per unit in the accompanying condensed consolidated balance sheet of Digital Realty Trust, Inc.

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Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2011

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

(a) Principles of Consolidation and Basis of Presentation

The accompanying interim condensed consolidated financial statements include all of the accounts of Digital Realty Trust, Inc., the Operating Partnership and the subsidiaries of the Operating Partnership. Intercompany balances and transactions have been eliminated.

The accompanying interim condensed consolidated financial statements are unaudited, but have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) for interim financial information and in compliance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, they do not include all of the disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments necessary for a fair presentation have been included. All such adjustments are considered to be of a normal recurring nature, except as otherwise indicated. The results of operations for the interim periods are not necessarily indicative of the results to be obtained for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our annual report on Form 10-K for the year ended December 31, 2010.

The notes to the condensed consolidated financial statements of Digital Realty Trust, Inc. and the Operating Partnership have been combined to provide the following benefits:

• enhancing investors' understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both the Company and the Operating Partnership; and

• creating time and cost efficiencies through the preparation of one set of notes instead of two separate sets of notes.

There are few differences between the Company and the Operating Partnership, which are reflected in these condensed consolidated financial statements. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how Digital Realty Trust, Inc. and the Operating Partnership operate as an interrelated consolidated company. Digital Realty Trust, Inc.'s only material asset is its ownership of partnership interests of the Operating Partnership. As a result, Digital Realty Trust, Inc. does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public equity from time to time and guaranteeing certain unsecured debt of the Operating Partnership. Digital Realty Trust, Inc. itself does not hold any indebtedness but guarantees some of the unsecured debt of the Operating Partnership, as disclosed in these notes. The Operating Partnership holds substantially all the assets of the Company and holds the ownership interests in the Company's joint ventures. The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to the Operating Partnership in exchange for partnership units, the Operating Partnership generates the capital required by the Company's business through the Operating Partnership's operations, by the Operating Partnership's direct or indirect incurrence of indebtedness or through the issuance of partnership units.

The presentation of noncontrolling interests in operating partnership, stockholder's equity and partners' capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of the Operating Partnership. The common limited partnership interests held by the limited partners in the Operating Partnership are presented as limited partners' capital within partners' capital in the Operating Partnership's condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.'s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in the Operating Partnership are presented as general partner's capital within partners' capital in the Operating Partnership's condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders' equity in Digital Realty Trust, Inc.'s condensed consolidated financial statements. The differences in the presentations between stockholders' equity and partners' capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Operating Partnership levels.

To help investors understand the significant differences between the Company and the Operating Partnership, these condensed consolidated financial statements present the following separate sections for each of the Company and the Operating Partnership:

• condensed consolidated face financial statements; and

• the following notes to the condensed consolidated financial statements:

• Debt of the Company and Debt of the Operating Partnership;

• Income per Share and Income per Unit; and

• Equity and Accumulated Other Comprehensive Loss, Net of the Company and Capital and Comprehensive Income of the Operating Partnership.

In the sections that combine disclosure of Digital Realty Trust, Inc. and the Operating Partnership, these notes refer to actions or holdings as being actions or holdings of the Company. Although the Operating Partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the Company is appropriate because the business is one enterprise and the Company operates the business through the Operating Partnership.

(b) Cash Equivalents

For the purpose of the condensed consolidated statements of cash flows, we consider short-term investments with original maturities of 90 days or less to be cash equivalents. As of June 30, 2011, cash equivalents consist of investments in money market instruments.

(c) Share Based Compensation

We account for share based compensation using the fair value method of accounting. The estimated fair value of the stock options granted by us is being amortized on a straight-line basis over the vesting period of the stock options. The estimated fair value of the long-term incentive units and Class C Units (discussed in note 12(b)) granted by us is being amortized on a straight-line basis over the expected service period.

For share based compensation awards with performance conditions, we estimate the fair value of the award for each of the possible performance condition outcomes and amortize the compensation cost based on management's projected performance outcome. In the instance management's projected performance outcome changes prior to the final measurement date, compensation cost is adjusted accordingly.

(d) Income Taxes

Digital Realty Trust, Inc. (the Parent Company) has elected to be treated and believes that it has been organized and has operated in a manner that has enabled the Parent Company to qualify as a REIT for federal income tax purposes. As a REIT, the Parent Company generally is not required to pay federal corporate income taxes on its taxable income to the extent it is currently distributed to its stockholders.

However, qualification and taxation as a REIT depend upon the Parent Company's ability to meet the various qualification tests imposed under the Internal Revenue Code of 1986, as amended (the Code), including tests related to annual operating results, asset composition, distribution levels and diversity of stock ownership. Accordingly, no assurance can be given that the Parent Company has been organized or has operated or will continue to operate in a manner so as to qualify or remain qualified as a REIT. If the Parent Company fails to qualify as a REIT in any taxable year, it will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates.

The Operating Partnership is a partnership and is not required to pay federal income tax. Instead, taxable income is allocated to its partners, who include such amounts on their federal income tax returns. As such, no provision for federal income taxes has been included in the Operating Partnership's accompanying condensed consolidated financial statements.

Even if the Parent Company and the Operating Partnership are not subject to federal income taxes, they are taxed in certain states in which they operate. The Company is also taxed in non-U.S. countries where it operates that do not recognize U.S. REITs under their respective tax laws. The Company's consolidated taxable REIT subsidiary is subject to both federal and state income taxes to the extent there is taxable income. Accordingly, the Company recognizes and accrues income taxes for its taxable REIT subsidiary, certain states and non-U.S. jurisdictions, as appropriate.

We assess our significant tax positions in accordance with U.S. GAAP for all open tax years and determine whether we have any material unrecognized liabilities from uncertain tax benefits. If a tax position is not considered "more-likely-than-not" to be sustained solely on its technical merits, no benefits of the tax position are to be recognized (for financial statement purposes). As of June 30, 2011 and December 31, 2010, we have no assets or liabilities for uncertain tax positions. We classify interest and penalties from significant uncertain tax positions as interest expense and operating expense, respectively, in our condensed consolidated statements of operations. For the three and six months ended June 30, 2011 and 2010, we had no such interest or penalties. The tax years 2007 through 2010 remain open to examination by the major taxing jurisdictions with which the Parent Company and its subsidiaries file tax returns.

See Note 9 for further discussion on income taxes.

(e) Presentation of Transactional-based Taxes

We account for transactional-based taxes, such as value added tax, or VAT, for our international properties on a net basis.

(f) Asset Retirement Obligations

We record accruals for estimated retirement obligations as required by current accounting guidance. The amount of asset retirement obligations relates primarily to estimated asbestos removal costs at the end of the economic life of properties that were built before 1984. As of June 30, 2011 and December 31, 2010, the amount included in accounts payable and other accrued liabilities on our condensed consolidated balance sheets was approximately $1.3 million.

(g) Assets and Liabilities Measured at Fair Value

Fair value under U.S. GAAP is a market-based measurement, not an entity-specific measurement. Therefore, our fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair-value measurements, we use a fair-value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity's own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which are typically based on an entity's own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair-value measurement is based on inputs from different levels of the fair-value hierarchy, the level in the fair-value hierarchy within which the entire fair-value measurement falls is based on the lowest level input that is significant to the fair-value measurement in its entirety. Our assessment of the significance of a particular input to the fair-value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

(h) Construction Management Revenue

Construction management revenue is recognized under the percentage-of-completion method of accounting. Revenues are determined by measuring the percentage of total costs incurred to date to estimated total costs for each construction management contract based on current estimates of costs to complete. Contract costs include all labor and benefits, materials, subcontracts, and an allocation of indirect costs related to contract performance. Indirect costs are allocated to projects based upon labor hours charged. As long-term design-build projects extend over one or more years, revisions in cost and estimated earnings during the course of the work are reflected in the accounting period in which the facts which require the revision become known. At the time a loss on a design-build project becomes known, the entire amount of the estimated ultimate loss is recognized in the condensed consolidated financial statements. Change orders are recognized when they are approved by the client.

Costs and estimated earnings in excess of billings on uncompleted construction management projects are included in other assets in the condensed consolidated balance sheets. Billings in excess of costs and estimated earnings on uncompleted construction management projects are included in accounts payable and accrued liabilities in the condensed consolidated balance sheets. Customers are billed on a monthly basis at the end of each month, which can be in advance of work performed.

(i) Transactions Expense

Transactions expense includes acquisition-related expenses and other business development expenses, which are expensed as incurred. Acquisition-related expenses include closing costs, broker commissions and other professional fees, including legal and accounting fees related to acquisitions and potential acquisitions.

(j) Capitalization of Costs

Direct and indirect project costs that are clearly associated with the development and redevelopment of properties are capitalized as incurred. Project costs include all costs directly associated with the development or redevelopment of a property, including construction costs, interest, property taxes, insurance, legal fees and costs of personnel working on the project. Indirect costs that do not clearly relate to the projects under development/redevelopment are not capitalized and are charged to expense as incurred.

Capitalization of costs begins when the activities necessary to get the development/redevelopment project ready for its intended use begins, which include costs incurred before the beginning of construction. Capitalization of costs ceases when the development/redevelopment project is substantially complete and ready for its intended use. Determining when a development/redevelopment project commences, and when it is substantially complete and ready for its intended use involves a degree of judgment. We generally consider a development/redevelopment project to be substantially complete and ready for its intended use upon recommissioning, which is when the redeveloped/developed project has been tested at full load, or receipt of a certificate of occupancy. We cease cost capitalization if activities necessary for the development/redevelopment of the property have been suspended. Capitalized costs are allocated to the specific components of a project that are benefited.

   (k) Management's Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates made. On an on-going basis, we evaluate our estimates, including those related to acquiring, developing and assessing the carrying values of our real estate properties, accrued liabilities, performance-based equity compensation plans, and Digital Realty Trust, Inc.'s qualification as a REIT. We base our estimates on historical experience, current market conditions, and various other assumptions that are believed to be reasonable under the circumstances. Actual results may vary from those estimates and those estimates could vary under different assumptions or conditions.

(l) Segment Information

All of our properties generate similar revenues and expenses related to tenant rent and reimbursements and operating expenses. The delivery of our products is consistent across all properties and although services are provided to a wide range of customers, the types of services provided to them are limited to a few core principles. As such, the properties in our portfolio have similar economic characteristics and the nature of the products and services provided to our customers and the method to distribute such services are consistent throughout the portfolio. Consequently, our properties qualify for aggregation into one reporting segment.

(m) Reclassifications

Certain reclassifications to prior year amounts have been made to conform to the current year presentation. During the three and six months ended June 30, 2010, $1.0 million and $2.5 million was reclassified from rental revenue to construction management revenue, respectively, and $0.5 million and $1.1 million was reclassified from rental property operating and maintenance expense to construction management expense, respectively.

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Incentive Plan (Summary of Stock Option Outstanding and Exercisable) (Details) (USD $)	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Number outstanding	381,234	470,264
Weighted average remaining contractual life (years), Outstanding	4.53
Weighted average exercise price, Outstanding	$ 26.01
Aggregate intrinsic value, Outstanding	$ 13,635,643
Number exercisable	317,007
Weighted average remaining contractual life (years), Exercisable	4.27
Weighted average exercise price, Exercisable	$ 22.90
Aggregate intrinsic value, Exercisable	12,326,503
$12.00-13.02 [Member]
Number outstanding	182,369
Weighted average remaining contractual life (years), Outstanding	3.33
Weighted average exercise price, Outstanding	$ 12.01
Aggregate intrinsic value, Outstanding	9,077,054
Number exercisable	182,369
Weighted average remaining contractual life (years), Exercisable	3.33
Weighted average exercise price, Exercisable	$ 12.01
Aggregate intrinsic value, Exercisable	9,077,054
$20.37-28.09 [Member]
Number outstanding	22,722
Weighted average remaining contractual life (years), Outstanding	4.47
Weighted average exercise price, Outstanding	$ 22.98
Aggregate intrinsic value, Outstanding	881,525
Number exercisable	22,638
Weighted average remaining contractual life (years), Exercisable	4.46
Weighted average exercise price, Exercisable	$ 22.97
Aggregate intrinsic value, Exercisable	878,584
$33.18-41.73 [Member]
Number outstanding	176,143
Weighted average remaining contractual life (years), Outstanding	5.79
Weighted average exercise price, Outstanding	$ 40.90
Aggregate intrinsic value, Outstanding	3,677,064
Number exercisable	112,000
Weighted average remaining contractual life (years), Exercisable	5.77
Weighted average exercise price, Exercisable	$ 40.61
Aggregate intrinsic value, Exercisable	$ 2,370,865

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Acquired Intangible Assets and Liabilities (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Increase to rental revenues	$ 202,806,000	$ 156,831,000	$ 399,601,000	$ 308,138,000
Acquired in Place Lease Value [Member]
Expected remaining lives (years)			4.5
Costs incurred to renew or extend leases	13,500,000	10,200,000	27,800,000	20,100,000
Weighted average period prior to renewal (years)			3.9
Acquired Below-Market Leases [Member]
Increase to rental revenues	$ 1,900,000	$ 2,400,000	$ 3,700,000	$ 4,700,000
Expected remaining lives (years)			4.8
Acquired Above-Market Leases [Member]
Expected remaining lives (years)			3.6

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Acquired Intangible Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2011

Summary of Acquired Intangible Assets

	Balance as of
(Amounts in thousands)	June 30, 2011			December 31, 2010
Acquired in place lease value:
Gross amount	$	518,357		$	515,958
Accumulated amortization		(290,853	)		(261,978	)
Net	$	227,504		$	253,980
Acquired above-market lease value:
Gross amount	$	88,126		$	87,622
Accumulated amortization		(53,620	)		(47,083	)
Net	$	34,506		$	40,539
Acquired below-market lease value:
Gross amount	$	191,940		$	189,990
Accumulated amortization		(107,422	)		(96,740	)
Net	$	84,518		$	93,250

Schedule of Estimated Annual Amortization of Leases

(Amounts in thousands)
2012	$	6,546
2013		7,115
2014		5,754
2015		5,088
2016		4,208

Acquired in Place Lease Value [Member]

Schedule of Estimated Annual Amortization of Leases

(Amounts in thousands)
2012	$	42,321
2013		37,960
2014		33,062
2015		24,816
2016		16,371

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Equity and Accumulated Other Comprehensive Loss, Net (Schedule of Accumulated Other Comprehensive Income Net) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Accumulated other comprehensive loss, net, Beginning balance			$ (42,081)
Net current period change	8,631	(19,232)	25,037	(37,519)
Decrease in fair value of interest rate swaps	(2,453)	(1,820)	(947)	(6,096)
Accumulated other comprehensive loss, net, Ending balance	(16,169)		(16,169)
Foreign Currency Translation Adjustments [Member]
Foreign currency translation adjustments, Beginning balance			(33,175)
Net current period change			23,800
Foreign currency translation adjustments, Ending balance	(9,375)		(9,375)
Cash Flow Hedge Adjustments [Member]
Cash flow hedge adjustment, Beginning balance			(8,906)
Decrease in fair value of interest rate swaps			(907)
Reclassification to interest expense from interest rate swaps			3,019
Cash flow hedge adjustment, Ending balance	(6,794)		(6,794)
Accumulated Other Comprehensive Loss, net [Member]
Accumulated other comprehensive loss, net, Beginning balance			(42,081)
Net current period change			23,800
Decrease in fair value of interest rate swaps			(907)
Accumulated other comprehensive loss, net, Net current period change			22,893
Reclassification to interest expense from interest rate swaps			3,019
Accumulated other comprehensive loss, net, Ending balance	$ (16,169)		$ (16,169)

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Fair Value of Instruments (Estimated Fair Value and Carrying Amounts) (Details) (USD $) In Thousands	Jun. 30, 2011		Dec. 31, 2010
Revolving credit facility	$ 341,417		$ 333,534
Unsecured senior notes	1,465,587		1,066,030
Exchangeable senior debentures	314,588		353,702
Mortgage Loans	935,485		1,043,188
Other secured loan	10,500		10,500
Long-term Debt	3,067,577		2,806,954
Unamortized discount	9,526
Senior Notes [Member]
Unamortized discount	9,413		8,970
4.125% Exchangeable Senior Debentures due 2026 [Member]
Unamortized discount	113		1,456
Estimated Fair Value [Member]
Revolving credit facility	341,417	[1]	333,534	[1]
Unsecured senior notes	1,535,735	[2],[3]	1,103,983	[2],[3]
Exchangeable senior debentures	500,134	[2],[3]	504,241	[2],[3]
Mortgage Loans	986,894	[3]	1,078,220	[3]
Other secured loan	10,725		10,720
Long-term Debt	3,374,905		3,030,698
Carrying Value [Member]
Revolving credit facility	341,417	[1]	333,534	[1]
Unsecured senior notes	1,465,587	[2],[3]	1,066,030	[2],[3]
Exchangeable senior debentures	314,588	[2],[3]	353,702	[2],[3]
Mortgage Loans	935,485	[3]	1,043,188	[3]
Other secured loan	10,500		10,500
Long-term Debt	$ 3,067,577		$ 2,806,954

[1] The carrying value of our revolving credit facility approximates estimated fair value, due to the short-term nature of this instrument along with the variability of interest rates.

[2] The carrying value of the 2015 Notes, 2020 Notes and 2021 Notes are net of discount of $9,413 and $8,970 in the aggregate as of June 30, 2011 and December 31, 2010, respectively. The carrying values of our exchangeable senior debentures are net of discount of $113 and $1,456 as of June 30, 2011 and December 31, 2010, respectively, related to our 2026 Debentures.

[3] Valuations for our unsecured senior notes and mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2015 Notes, 2020 Notes and 2021 Notes and exchangeable senior debentures are valued based on quoted market prices.

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Equity and Accumulated Other Comprehensive Loss, Net (Narrative) (Details) (USD $)	6 Months Ended		12 Months Ended	1 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Jun. 30, 2011 Equity Distribution Agreement [Member]	Jun. 30, 2011 Equity Distribution Agreement [Member]	Jan. 22, 2010 Equity Distribution Agreement [Member]
Aggregate offering price of the distribution agreement maximum				$ 400,000,000	$ 400,000,000	$ 54,300,000
Aggregate shares issued from the distribution agreement				3,000,000	3,000,000	1,100,000
Common stock sold	98,754,727		91,159,221	6,800,000	6,800,000
Gross proceeds from the sale of common stock	179,583,000	461,868,000		400,000,000
Net proceeds from sale of common stock				394,000,000	176,900,000
Price per share sold as part of the distribution agreement					$ 60.51
Payment of commissions to sales agents					2,700,000
Redemption value of OP units	272,000,000		244,500,000
Available indebtedness	17,800,000
Acquisition of noncontrolling ownership in joint venture	$ 53,200,000

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Capital and Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2011

Schedule of Dividends Declared and Payable

(c) Dividends

We have declared the following dividends on our common and preferred stock for the six months ended June 30, 2011 (in thousands):

Date dividend declared	Dividend payable date		Series C Preferred Stock (1)		Series D Preferred Stock (2)		Common Stock  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	62,459
April 25, 2011		June 30, 2011	$	1,441	$	3,272	$	67,031
			$	3,273	$	7,962	$	129,490

(1) $1.094 annual rate of dividend per share.

(2) $1.375 annual rate of dividend per share.

(3) $2.720 annual rate of dividend per share.

Schedule of Accumulated Other Comprehensive Income

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss, net
Balance as of December 31, 2010	$	(33,175	)	$	(8,906	)	$	(42,081	)
Net current period change		23,800			(907	)		22,893
Reclassification to interest expense from interest rate swaps		—			3,019			3,019
Balance as of June 30, 2011	$	(9,375	)	$	(6,794	)	$	(16,169	)

Digital Realty Trust, L.P. [Member]

Schedule of Dividends Declared and Payable

Date distribution declared	Distribution payable date		Series C Preferred Units (1)		Series D Preferred Units (2)		Common Units  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	66,252
April 25, 2011		June 30, 2011	$	1,441	$	3,272	$	70,577
			$	3,273	$	7,962	$	136,829

(1) $1.094 annual rate of distribution per unit.

(2) $1.375 annual rate of distribution per unit.

(3) $2.720 annual rate of distribution per unit.

Schedule of Accumulated Other Comprehensive Income

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance as of December 31, 2010	$	(36,051	)	$	(9,809	)	$	(45,860	)
Net current period change		25,037			(947	)		24,090
Reclassification to interest expense from interest rate swaps		—			3,174			3,174
Balance as of June 30, 2011	$	(11,014	)	$	(7,582	)	$	(18,596	)

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Acquired Intangible Assets and Liabilities (Summary of Acquired Intangible Assets) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Acquired in place lease value, Net	$ 322,793	$ 334,366
Acquired above market leases, Net	34,506	40,539
Acquired below market leases, Net	84,518	93,250
Acquired in Place Lease Value [Member]
Acquired in place lease, Gross amount	518,357	515,958
Accumulated amortization	(290,853)	(261,978)
Acquired in place lease value, Net	227,504	253,980
Acquired Above-Market Leases [Member]
Acquired above market leases, Gross amount	88,126	87,622
Accumulated amortization	(53,620)	(47,083)
Acquired above market leases, Net	34,506	40,539
Acquired Below-Market Leases [Member]
Acquired below market leases, Gross amount	191,940	189,990
Accumulated amortization	(107,422)	(96,740)
Acquired below market leases, Net	$ 84,518	$ 93,250

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Income per Share (Tables)

6 Months Ended

Jun. 30, 2011

Income per Share

Summary of Basic and Diluted Earnings per Share

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Net income available to common stockholders	$	31,990	$	9,091	$	62,970	$	23,835
Weighted average shares outstanding—basic		96,295,585		80,542,329		93,875,415		79,164,167
Potentially dilutive common shares:
Stock options		203,078		225,931		193,985		206,803
Class C Units (2007 Grant)		73,855		154,229		67,856		142,747
Unvested incentive units		180,377		179,267		152,927		155,504
Excess exchange value of the 2026 Debentures		758,916		1,920,061		722,782		1,781,415
Weighted average shares outstanding—diluted		97,511,811		83,021,817		95,012,965		81,450,636
Income per share:
Basic	$	0.33	$	0.11	$	0.67	$	0.30
Diluted	$	0.33	$	0.11	$	0.66	$	0.29

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Weighted average of Operating Partnership common units not owned by us		4,760,802		4,964,417		4,823,553		4,874,406
Potentially dilutive outstanding stock options		—		—		—		5,346
Potentially dilutive 2029 Debentures		6,289,434		6,195,345		6,279,766		6,195,345
Potentially dilutive Series C Cumulative Convertible Preferred Stock		2,864,660		3,657,477		3,256,316		3,657,477
Potentially dilutive Series D Cumulative Convertible Preferred Stock		6,418,585		8,237,540		7,370,713		8,226,381
		20,333,481		23,054,779		21,730,348		22,958,955

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Equity and Accumulated Other Comprehensive Loss, Net

6 Months Ended

Jun. 30, 2011

Equity and Accumulated Other Comprehensive Loss, Net

Equity and Accumulated Other Comprehensive Loss, Net

10. Equity and Accumulated Other Comprehensive Loss, Net

(a) Equity Distribution Agreements

On December 31, 2009, Digital Realty Trust, Inc. entered into equity distribution agreements, which we refer to as the Original Equity Distribution Agreements, with each of Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated and Credit Suisse Securities (USA) LLC, or the Original Agents, under which it could issue and sell shares of its common stock having an aggregate offering price of up to $400.0 million from time to time through, at its discretion, any of the Original Agents as its sales agents. On January 22, 2010, Digital Realty Trust, Inc. amended and restated each Original Equity Distribution Agreement with the applicable Original Agent, and also entered into a new equity distribution agreement with Morgan Stanley & Co. Incorporated, or collectively the Equity Distribution Agreements, under which it may issue and sell shares of its common stock having an aggregate offering price of up to $400.0 million (including the approximately 1.1 million shares of common stock having an aggregate offering price of approximately $54.3 million sold pursuant to the Original Equity Distribution Agreements as of January 22, 2010), from time to time through, at its discretion, any of the Original Agents or Morgan Stanley & Co. Incorporated as its sales agents. On March 2, 2011, the Equity Distribution Agreements were amended to amend certain representations. The sales of common stock made under the Equity Distribution Agreements will be made in "at the market" offerings as defined in Rule 415 of the Securities Act. For the six months ended June 30, 2011, Digital Realty Trust, Inc. generated net proceeds of approximately $176.9 million from the issuance of approximately 3.0 million common shares under the Equity Distribution Agreements at an average price of $60.51 per share after payment of approximately $2.7 million of commissions to the sales agents and before offering expenses. In June 2011, we completed the equity distribution program. Pursuant to the program, we sold 6.8 million shares of common stock for gross proceeds of $400.0 million, resulting in net proceeds of approximately $394.0 million after deducting commissions.

On June 29, 2011, Digital Realty Trust, Inc. entered into equity distribution agreements with each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Credit Suisse Securities (USA) LLC, Deutsche Bank Securities Inc. and Morgan Stanley & Co. LLC, or the Agents, under which it could issue and sell shares of its common stock having an aggregate offering price of up to $400.0 million from time to time through, at its discretion, any of the Agents as its sales agents. The sales of common stock made under the equity distribution agreements will be made in "at the market" offerings as defined in Rule 415 of the Securities Act.

(b) Noncontrolling Interests in Operating Partnership

Noncontrolling interests in the Operating Partnership relate to the interests that are not owned by Digital Realty Trust, Inc. The following table shows the ownership interest in the Operating Partnership as of June 30, 2011 and December 31, 2010:

	June 30, 2011					December 31, 2010
	Number of units		Percentage of total			Number of units		Percentage of total
Digital Realty Trust, Inc.		98,754,727		95.1	%		91,159,221		94.3	%
Noncontrolling interests consist of:
Common units held by third parties		3,430,814		3.3			3,937,827		4.1
Incentive units held by employees and directors (see note 12)		1,604,032		1.6			1,525,622		1.6
		103,789,573		100.0	%		96,622,670		100.0	%

Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of Digital Realty Trust, Inc. common stock at the time of redemption. Alternatively, Digital Realty Trust, Inc. may elect to acquire those common units in exchange for shares of Digital Realty Trust, Inc. common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, Digital Realty Trust, Inc. evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the noncontrolling Operating Partnership common and incentive units. Based on the results of this analysis, we concluded that the common and incentive Operating Partnership units met the criteria to be classified within equity.

The redemption value of the noncontrolling Operating Partnership common units and the vested incentive units was approximately $272.0 million and $244.5 million based on the closing market price of Digital Realty Trust, Inc. common stock on June 30, 2011 and December 31, 2010, respectively.

The following table shows activity for the noncontrolling interests in the Operating Partnership for the six months ended June 30, 2011:

	Common Units			Incentive Units			Total
As of December 31, 2010		3,937,827			1,525,622			5,463,449
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1)		(507,013	)		—			(507,013	)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1)		—			(51,957	)		(51,957	)
Cancellation of incentive units held by employees and directors		—			(53,138	)		(53,138	)
Grant of incentive units to employees and directors		—			183,505			183,505
As of June 30, 2011		3,430,814			1,604,032			5,034,846

(1) This redemption was recorded as a reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital based on the book value per unit in the accompanying condensed consolidated balance sheet of Digital Realty Trust, Inc.

Under the terms of certain third parties' (the eXchange parties) contribution agreements signed in the third quarter of 2004, we have agreed to indemnify each eXchange party against adverse tax consequences in the event the Operating Partnership directly or indirectly sells, exchanges or otherwise disposes of (whether by way of merger, sale of assets or otherwise) in a taxable transaction any interest in 200 Paul Avenue 1-4 or 1100 Space Park Drive until the earlier of November 3, 2013 and the date on which these contributors or certain transferees hold less than 25% of the Operating Partnership common units issued to them in the formation transactions consummated concurrently with the IPO. Under the eXchange parties' amended contribution agreement, the Operating Partnership has agreed to make approximately $17.8 million of indebtedness available for guaranty by the eXchange parties until the earlier of November 3, 2013 and the date on which these contributors or certain transferees hold less than 25% of the Operating Partnership common units issued to them in the formation transactions consummated concurrently with the IPO, and we have agreed to indemnify each eXchange party against adverse tax consequences if the Operating Partnership does not provide such indebtedness to guarantee.

(c) Dividends

We have declared the following dividends on our common and preferred stock for the six months ended June 30, 2011 (in thousands):

Date dividend declared	Dividend payable date		Series C Preferred Stock (1)		Series D Preferred Stock (2)		Common Stock  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	62,459
April 25, 2011		June 30, 2011	$	1,441	$	3,272	$	67,031
			$	3,273	$	7,962	$	129,490

(1) $1.094 annual rate of dividend per share.

(2) $1.375 annual rate of dividend per share.

(3) $2.720 annual rate of dividend per share.

Distributions out of Digital Realty Trust, Inc.'s current or accumulated earnings and profits are generally classified as dividends whereas distributions in excess of its current and accumulated earnings and profits, to the extent of a stockholder's U.S. federal income tax basis in Digital Realty Trust, Inc.'s stock, are generally classified as a return of capital. Distributions in excess of a stockholder's U.S. federal income tax basis in Digital Realty Trust, Inc.'s stock are generally characterized as capital gain. Cash provided by operating activities has been sufficient to fund all distributions.

(d) Accumulated Other Comprehensive Loss, Net

The accumulated balances for each classification of other comprehensive loss, net as of June 30, 2011 are as follows (in thousands):

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss, net
Balance as of December 31, 2010	$	(33,175	)	$	(8,906	)	$	(42,081	)
Net current period change		23,800			(907	)		22,893
Reclassification to interest expense from interest rate swaps		—			3,019			3,019
Balance as of June 30, 2011	$	(9,375	)	$	(6,794	)	$	(16,169	)

(e) Noncontrolling Interests in Consolidated Joint Ventures

On June 24, 2011, we acquired all of the noncontrolling ownership interest in the entity that owns Datacenter Park Dallas from our joint venture partner for approximately $53.2 million (subject to adjustment in limited circumstances). The acquisition was financed with borrowings under our revolving credit facility. The amount paid in excess of the carrying value of the noncontrolling ownership interest resulted in a decrease to additional paid-in capital, as presented in the accompanying condensed consolidated statement of equity.

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Income per Share (Summary of Basic and Diluted Earnings per Share) (Details) (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Income per Share
Net income available to common stockholders	$ 31,990	$ 9,091	$ 62,970	$ 23,835
Weighted average shares outstanding-basic	96,295,585	80,542,329	93,875,415	79,164,167
Stock options	203,078	225,931	193,985	206,803
Class C Units (2007 Grant)	73,855	154,229	67,856	142,747
Unvested incentive units	180,377	179,267	152,927	155,504
Excess exchange value of the 2026 Debentures	758,916	1,920,061	722,782	1,781,415
Weighted average shares outstanding-diluted	97,511,811	83,021,817	95,012,965	81,450,636
Basic	$ 0.33	$ 0.11	$ 0.67	$ 0.30
Diluted	$ 0.33	$ 0.11	$ 0.66	$ 0.29

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Subsequent Events (Schedule of Dividends Declared and Distributions per Unit) (Details)	0 Months Ended				6 Months Ended		0 Months Ended
	Jul. 26, 2011 USD ($)	Jul. 26, 2011 GBP (£)	Jul. 21, 2011 USD ($) A	Jul. 21, 2011 AUD	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Jul. 25, 2011 Series C Preferred Unit Subsequent Dividends [Member] USD ($)	Jul. 25, 2011 Series D Preferred Unit Subsequent Dividends [Member] USD ($)	Jul. 25, 2011 Common Stock And Common Unit Subsequent Dividends [Member] USD ($)	Jul. 25, 2011 Prudential Shelf Facility [Member] USD ($)
Repurchase of debenture price percentage					100.00%
Acres acquired from real estate purchase			8.6	8.6
Acquisitions of properties	$ 21,200,000	£ 12,900,000	$ 11,000,000	10,100,000	$ 17,523,000	$ 405,983,000
Repayments of 7.0% Series A unsecured notes										$ 25,000,000
Debt instrument, interest rate, stated percentage										7.00%
Dividend and distribution amount							$ 0.273438	$ 0.343750	$ 0.680000
Dividend and distribution payable date							Sep. 30, 2011	Sep. 30, 2011	Sep. 30, 2011
Dividend payable to shareholders of record on							Sep. 15, 2011	Sep. 15, 2011	Sep. 15, 2011
Annual equivalent rate of dividend and distribution							$ 1.094	$ 1.375	$ 2.720

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Incentive Plan (Restricted Stock) (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Service conditions of the awards			The service conditions of the awards provide for 20% vesting on each of the first and second anniversaries of the grant date and 30% vesting on each of the third and fourth anniversaries of the grant date
Service and Performance Condition [Member] | Restricted Stock [Member]
Restricted shares granted			50,999	37,914
Restricted Stock [Member]
Restricted shares granted			40,807	31,164
Restricted stock, vesting period (years)			four
Restricted Stock Expense	$ 0.5	$ 0.4	$ 1.0	$ 0.7
Capitalized expense related to construction and leasing activities	0.4	0.3	0.7	0.4
Unearned compensation due to the unvested portion of restricted stock			$ 7.1		$ 4.2
Period of recognition of unearned compensation (years)			3.2

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2011
Income Taxes
Percentage of taxable income distributed to the partnership					100.00%
Provision for federal income taxes	$ 0	$ 0	$ 0	$ 0

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Acquisitions

6 Months Ended

Jun. 30, 2011

Acquisitions

Acquisitions

3. Acquisitions

We acquired the following real estate property during the six months ended June 30, 2011:

Location	Metropolitan Area	Date Acquired	Amount (in millions)
Loudoun Parkway North (1)	Northern Virginia	April 15, 2011	$	17.3

(1) Represents vacant land which is not included in our operating property count.

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Derivative Instruments

6 Months Ended

Jun. 30, 2011

Derivative Instruments

Derivative Instruments

13. Derivative Instruments

Currently, we use interest rate caps and swaps to manage our interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves.

To comply with the provisions of fair value accounting guidance, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty's nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.

Although we have determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by us and our counterparties. However, as of December 31, 2010, we have assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and have determined that the credit valuation adjustments are not significant to the overall valuation of our derivatives. As a result, we have determined that our derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

Cash Flow Hedges of Interest Rate Risk

Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements related to US LIBOR, GBP LIBOR and EURIBOR based mortgage loans. To accomplish this objective, we primarily use interest rate swaps and caps as part of our interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Under an interest rate cap, if the reference interest rate, such as one-month LIBOR, increases above the cap rate, the holder of the instrument receives a payment based on the notional value of the instrument, the length of the period, and the difference between the current reference rate and the cap rate. If the reference rate increases above the cap rate, the payment received under the interest rate cap will offset the increase in the payments due under the variable rate notes payable.

We record all our interest rate swaps and caps on the consolidated balance sheet at fair value. In determining the fair value of our interest rate swaps and caps, we consider the credit risk of our counterparties. These counterparties are generally larger financial institutions engaged in providing a variety of financial services. These institutions generally face similar risks regarding adverse changes in market and economic conditions, including, but not limited to, fluctuations in interest rates, exchange rates, equity and commodity prices and credit spreads. The current and pervasive disruptions in the financial markets have heightened the risks to these institutions.

Interest rate caps are viewed as a series of call options or caplets which exist for each period the cap agreement is in existence. As each caplet expires, the related cost of the expired caplet is amortized to interest expense with the remaining caplets carried at fair value. The value of interest rate caps is primarily impacted by interest rates, market expectations about interest rates, and the remaining life of the instrument. In general, increases in interest rates, or anticipated increases in interest rates, will increase the value of interest rate caps. As the remaining life of an interest rate cap decreases, the value of the instrument will generally decrease towards zero. The purchase price of an interest rate cap is amortized to interest expense over the contractual life of the instrument. For interest rate caps that are designated as cash flow hedges under accounting guidance as it relates to derivative instruments, the change in the fair value of an effective interest rate cap is recorded to accumulated other comprehensive income in equity. Amounts we are entitled to under interest rate caps, if any, are recognized on an accrual basis, and are recorded to as a reduction against interest expense in the accompanying consolidated statements of operations.

Our agreements with some of our derivative counterparties provide either that (1) we could be declared in default on our derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to our default on the indebtedness or (2) we could be declared in default on our derivative obligations if we default on any of our indebtedness, including a default where repayment of the underlying indebtedness has not been accelerated by the lender.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income (loss) and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During 2011, such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt. The fair value of these derivatives was ($5.7) million and ($8.0) million at June 30, 2011 and December 31, 2010, respectively. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the three and six months ended June 30, 2011 and 2010, respectively, there were no ineffective portions to our interest rate swaps.

Amounts reported in accumulated other comprehensive loss related to interest rate swaps will be reclassified to interest expense as interest payments are made on our debt. As of June 30, 2011, we estimate that an additional $3.8 million will be reclassified as an increase to interest expense during the twelve months ending June 30, 2012, when the hedged forecasted transactions impact earnings.

As of June 30, 2011 and December 31, 2010, we had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk (in thousands):

Notional Amount												Fair Value at Significant Other Observable Inputs (Level 2)
As of June 30, 2011			As of December 31, 2010			Type of Derivative		Strike Rate		Effective Date	Expiration Date	As of June 30, 2011			As of December 31, 2010
$	—		$	19,515	(1)		Swap		4.944	Jul. 10, 2006	Apr. 10, 2011	$	—		$	(231	)
	68,747	(1)		66,858	(1)		Swap		2.980	April 6, 2009	Nov. 30, 2013		(2,606	)		(2,471	)
	15,024	(2)		13,978	(2)		Swap		3.981	May 17, 2006	Jul. 18, 2013		(593	)		(828	)
	10,870	(2)		10,113	(2)		Swap		4.070	Jun. 23, 2006	Jul. 18, 2013		(448	)		(621	)
	9,566	(2)		8,900	(2)		Swap		3.989	Jul. 27, 2006	Oct. 18, 2013		(412	)		(557	)
	44,534	(2)		41,430	(2)		Swap		3.776	Dec. 5, 2006	Jan. 18, 2012		(516	)		(1,129	)
	38,289	(2)		35,620	(2)		Swap		4.000	Dec. 20, 2006	Jan. 18, 2012		(491	)		(1,054	)
	43,506	(2)		40,152	(2)		Swap		2.703	Dec. 3, 2009	Sep. 4, 2014		(630	)		(1,139	)
	16,576			16,976			Cap		4.000	June 24, 2009	June 25, 2012		—			3
	20,500			20,500			Cap		4.000	Aug. 4, 2010	June 15, 2013		4			30
$	267,612		$	274,042								$	(5,692	)	$	(7,997	)

(1) Translation to U.S. dollars is based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

(2) Translation to U.S. dollars is based on exchange rate of $1.45 to €1.00 as of June 30, 2011 and $1.34 to €1.00 as of December 31, 2010.

We do not have any fair value measurements using significant unobservable inputs (Level 3) as of June 30, 2011 or December 31, 2010.

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Equity and Accumulated Other Comprehensive Loss, Net (Schedule of Dividends Declared and Payable) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Mar. 31, 2011		Jun. 30, 2011
Series C Preferred Stock [Member]
Date distribution declared	Apr. 25, 2011		Feb. 10, 2011
Distribution payable date	Jun. 30, 2011		Mar. 31, 2011
Dividends/Distributions, preferred stock/units	$ 1,441	[1]	$ 1,832	[1]	$ 3,273	[1]
Preferred Units, annual rate of distribution per unit					$ 1.094
Series D Preferred Stock [Member]
Date distribution declared	Apr. 25, 2011		Feb. 10, 2011
Distribution payable date	Jun. 30, 2011		Mar. 31, 2011
Dividends/Distributions, preferred stock/units	3,272	[2]	4,690	[2]	7,962	[2]
Preferred Units, annual rate of distribution per unit					$ 1.375
Common Stock [Member]
Date distribution declared	Apr. 25, 2011		Feb. 10, 2011
Distribution payable date	Jun. 30, 2011		Mar. 31, 2011
Dividends/Distributions, common stock/units	$ 67,031	[3]	$ 62,459	[3]	$ 129,490	[3]
Common Units, annual rate of distribution per unit					$ 2.720

[1] $1.094 annual rate of dividend per share.

[2] $1.375 annual rate of dividend per share.

[3] $2.720 annual rate of dividend per share.

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Equity and Accumulated Other Comprehensive Loss, Net (Noncontrolling Interest) (Details)	Jun. 30, 2011	Dec. 31, 2010
Digital Realty Trust, Inc. [Member]
Partners' capital account units	98,754,727	91,159,221
Percentage of total	95.10%	94.30%
Common Units Held by Third Parties [Member]
Common units held by third parties	3,430,814	3,937,827
Percentage of total	3.30%	4.10%
Incentive Units held by Employees and Directors [Member]
Incentive units held by employees and directors	1,604,032	1,525,622
Percentage of total	1.60%	1.60%
Noncontrolling Interests in Operating Partnership [Member]
Partners' capital account units	103,789,573	96,622,670
Percentage of total	100.00%	100.00%

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Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Period in which short-term investment become cash equivalents (days)			90
Assets or liabilities for uncertain tax positions	$ 0		$ 0		$ 0
Interest or penalties from uncertain tax positions	0	0	0	0
Asset retirement obligations	1,300,000		1,300,000		1,300,000
Amount reclassified from rental revenue to construction management revenue	740,000	1,715,000	1,421,000	2,548,000
Digital Realty Trust, Inc. [Member]
Amount reclassified from rental revenue to construction management revenue		1,000,000		2,500,000
Amount reclassified from rental property operating and maintenance expense to construction management expense		$ 500,000		$ 1,100,000

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Incentive Plan (Narrative) (Details) (USD $) In Millions, except Share data	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011 2004 Incentive Award Plan [Member]	May 02, 2007 Amended And Restated 2004 Incentive Award Plan [Member]
Shares authorized and reserved for issuance under the "Incentive Plan"		4,474,102	9,474,102
Increase in number of shares reserved for issuance			5,000,000
Maximum number of shares granted per employee	1,500,000
Maximum amount of cash paid per employee	$ 10.0
Number of shares remaining for issuance under the "Incentive Plan"	3,739,090

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Debt of the Operating Partnership (Tables)

6 Months Ended

Jun. 30, 2011

Debt of the Operating Partnership

Summary of Outstanding Indebtedness of the Operating Partnership

Indebtedness	Interest Rate at June 30, 2011	Maturity Date	Principal Outstanding June 30, 2011			Principal Outstanding December  31, 2010
Revolving credit facility	Various (1)	Aug. 31, 2011 (2)	$	341,417	(3)	$	333,534	(3)
Unsecured senior notes:
Prudential Shelf Facility:
Series A	7.000%	Jul. 24, 2011		25,000			25,000
Series B	9.320%	Nov. 5, 2013		33,000			33,000
Series C	9.680%	Jan. 6, 2016		25,000			25,000
Series D	4.570%	Jan. 20, 2015		50,000			50,000
Series E	5.730%	Jan. 20, 2017		50,000			50,000
Series F	4.500%	Feb. 3, 2015		17,000			17,000
Total Prudential Shelf Facility				200,000			200,000
Senior Notes:
4.50% notes due 2015	4.500%	Jul. 15, 2015		375,000			375,000
5.875% notes due 2020	5.875%	Feb. 1, 2020		500,000			500,000
5.25% notes due 2021	5.250%	Mar. 15, 2021		400,000			—
Unamortized discounts				(9,413	)		(8,970	)
Total senior notes, net of discount				1,265,587			866,030
Total unsecured senior notes, net of discount				1,465,587			1,066,030
Exchangeable senior debentures:
4.125% exchangeable senior debentures due 2026	4.125%	Aug. 15, 2026 (4)		48,301			88,758
5.50% exchangeable senior debentures due 2029	5.50%	Apr. 15, 2029 (5)		266,400			266,400
Unamortized discount				(113	)		(1,456	)
Total exchangeable senior debentures, net of discount				314,588			353,702

Indebtedness	Interest Rate at June 30, 2011	Maturity Date	Principal Outstanding June 30, 2011			Principal Outstanding December  31, 2010
Mortgage loans:
Secured Term Debt (6)(7)	5.65%	Nov. 11, 2014		140,186			141,465
3 Corporate Place (7)(8)	6.72%	Aug. 1, 2011		—	(15)		80,000
200 Paul Avenue 1-4 (7)	5.74%	Oct. 8, 2015		75,325			76,179
2045 & 2055 LaFayette Street (7)	5.93%	Feb. 6, 2017		65,995			66,437
Mundells Roundabout	3-month GBP LIBOR + 1.20% (9)	Nov. 30, 2013		68,747	(10)		66,858	(10)
600 West Seventh Street	5.80%	Mar. 15, 2016		53,443			54,157
34551 Ardenwood Boulevard 1-4 (7)	5.95%	Nov. 11, 2016		53,967			54,306
1100 Space Park Drive (7)	5.89%	Dec. 11, 2016		53,954			54,296
1350 Duane Avenue/3080 Raymond Street (7)	5.42%	Oct. 1, 2012		52,800			52,800
150 South First Street (7)	6.30%	Feb. 6, 2017		51,832			52,154
114 Rue Ambroise Croizat	3-month EURIBOR + 1.35% (9)	Jan. 18, 2012		44,534	(11)		41,430	(11)
Clonshaugh Industrial Estate II (8)	3-month EURIBOR + 4.50% (9)	Sep. 4, 2014		43,506	(11)		40,152	(11)
1500 Space Park Drive (7)	6.15%	Oct. 5, 2013		38,921			39,941
2334 Lundy Place (7)	5.96%	Nov. 11, 2016		39,250			39,496
Unit 9, Blanchardstown Corporate Park	3-month EURIBOR + 1.35% (9)	Jan. 18, 2012		38,289	(11)		35,620	(11)
Cressex 1 (13)	5.68%	Oct. 16, 2014		28,944	(10)		28,388	(10)
6 Braham Street (8)	3-month GBP LIBOR + 0.90% (9)	Apr. 10, 2011		—	(15)		19,515	(10)
1201 Comstock Street (7)(8)	1-month LIBOR + 3.50% (9)	Jun. 24, 2012 (2)		16,576			16,976
Datacenter Park — Dallas	5.00%	Sep. 15, 2011		—	(15)		16,150
Paul van Vlissingenstraat 16	3-month EURIBOR + 1.60% (9)	Jul. 18, 2013		15,024	(11)		13,978	(11)
Chemin de l'Epinglier 2	3-month EURIBOR + 1.50% (9)	Jul. 18, 2013		10,870	(11)		10,113	(11)
800 Central Expressway (7)	1-month LIBOR + 4.75%	Jun. 9, 2013		10,000			10,000
Gyroscoopweg 2E-2F (12)	3-month EURIBOR + 1.50% (9)	Oct. 18, 2013		9,566	(11)		8,900	(11)
1125 Energy Park Drive (7)	7.62% (14)	Mar. 1, 2032		8,983			9,060
Manchester Technopark (13)	5.68%	Oct. 16, 2014		8,805	(10)		8,636	(10)
731 East Trade Street	8.22%	Jul. 1, 2020		4,946			5,080
Unamortized net premiums				1,022			1,101
Total mortgage loans, net of premiums				935,485			1,043,188
Other secured loan:
800 Central Expressway Mezzanine (7)	1-month LIBOR + 8.50%	Jun. 9, 2013		10,500			10,500
Total other secured loan				10,500			10,500
Total indebtedness			$	3,067,577		$	2,806,954

(1) The interest rate under our revolving credit facility equals either (i) US LIBOR, EURIBOR and GBP LIBOR (ranging from 1- to 6-month maturities) plus a margin of between 1.10% and 2.00% or (ii) the greater of (x) the base rate announced by the lender and (y) 1/2 of 1% per annum above the federal funds rate, plus a margin of between 0.100%-—1.000%. In each case, the margin is based on our total leverage ratio. We incur a fee ranging from 0.125% to 0.20% for the unused portion of our unsecured revolving credit facility.

(2) A one-year extension is available, which we may exercise if certain conditions are met.

(3) Balances as of June 30, 2011 and December 31, 2010 are as follows (balances, in thousands):

Denomination of Draw	Balance as of June 30, 2011			Weighted-average interest rate			Balance as of December 31, 2010			Weighted- average interest rate
US ($)	$	251,000			1.39	%	$	312,500			1.40	%
Euro (€)		18,655	(a)		2.50	%		—			—
British Sterling (£)		71,762	(b)		1.83	%		21,034	(b)		1.69	%
Total	$	341,417			1.54	%	$	333,534			1.42	%

(a) Based on exchange rate of $1.45 to €1.00 as of June 30, 2011.

(b) Based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

(4) The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of August 15, 2011, August 15, 2016 and August 15, 2021. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on August 18, 2011.

(5) The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of April 15, 2014, April 15, 2019 and April 15, 2024. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on April 18, 2014.

(6) This amount represents six mortgage loans secured by our interests in 36 NE 2nd Street, 3300 East Birch Street, 100 & 200 Quannapowitt Parkway, 300 Boulevard East, 4849 Alpha Road, and 11830 Webb Chapel Road. Each of these loans is cross-collateralized by the six properties.

(7) The respective borrower's assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person.

(8) The Operating Partnership or its subsidiary provides a limited recourse guarantee with respect to this loan.

(9) We have entered into interest rate swap or interest rate cap agreements as a cash flow hedge for interest generated by these US LIBOR, EURIBOR and GBP LIBOR based loans. See note 13 for further information.

(10) Based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

(11) Based on exchange rate of $1.45 to €1.00 as of June 30, 2011 and $1.34 to €1.00 as of December 31, 2010.

(12) This loan is also secured by a €1.3 million letter of credit.

(13) These loans are also secured by a £7.8 million letter of credit. These loans are cross-collateralized by the two properties.

(14) If the loan is not repaid by March 1, 2012, the interest rate increases to the greater of 9.62% or the treasury rate then in effect plus 2%. Subject to a prepayment lock-out period through December 2011.

(15) These mortgages loans were repaid in full; 6 Braham Street (April 2011), 3 Corporate Place (May 2011) and Datacenter Park — Dallas (June 2011). Net loss from early extinguishment of debt related to prepayment costs on 3 Corporate Place amounted to $0.3 million for the three and six months ended June 30, 2011.

Schedule of Balances and Foreign Currency Translation Revolving Credit Facilities

Denomination of Draw	Balance as of June 30, 2011			Weighted-average interest rate			Balance as of December 31, 2010			Weighted- average interest rate
US ($)	$	251,000			1.39	%	$	312,500			1.40	%
Euro (€)		18,655	(a)		2.50	%		—			—
British Sterling (£)		71,762	(b)		1.83	%		21,034	(b)		1.69	%
Total	$	341,417			1.54	%	$	333,534			1.42	%

Summary of Senior Debentures Due 2026

	4.125% Exchangeable Senior Debentures due 2026
($ and shares in thousands, except exchange price)	June 30, 2011			December 31, 2010
Carrying amount of the equity component	$	5,119		$	9,406
Principal amount of the liability component	$	48,301		$	88,758
Unamortized discount of the liability component	$	113		$	1,456
Net carrying amount of the liability component	$	48,188		$	87,302
Remaining amortization period of discount		1 month			7 months
Exchange price	$	30.99		$	31.42
Number of shares to be issued upon exchange (a)		777			1,103
The amount by which the if-exchanged value exceeds the principal amount (a)	$	48,003		$	56,828
Effective interest rate on liability component		6.75	%		6.75	%
Non-cash interest cost recognized for the period ended	$	1,117		$	2,067	(b)
Coupon rate interest cost recognized for the period ended	$	1,376		$	3,490	(b)

(a) In accordance with accounting guidance on convertible debt instruments that require the principal amount to be settled in cash upon conversion, we are required to disclose the exchange price and the number of shares on which the aggregate consideration to be delivered upon exchange is determined (principal plus excess value). The 2026 Debentures require the entire principal amount to be settled in cash, and at our option, any excess value above the principal amount may be settled in cash and/or common shares. Based on the June 30, 2011 and December 31, 2010 closing share prices of Digital Realty Trust, Inc. common stock and the exchange prices in the table above, the excess value was approximately $48.0 million and $56.8 million, respectively; accordingly, approximately 0.8 million and 1.1 million common shares, respectively, would be issued if the 2026 Debentures were settled on these dates and we elected to settle the excess value in shares of Digital Realty Trust, Inc. common stock.

(b) Amounts are for the six months ended June 30, 2010.

Schedule of Debt Maturities and Principal Maturities

	Revolving Credit Facility (1)		Unsecured Senior Notes		Senior Notes			Exchangeable Senior Debentures			Mortgage Loans (2)		Other Secured Loan		Total Debt
Remainder of 2011	$	341,417	$	25,000	$	—		$	48,301	(3)	$	7,607	$	—	$	422,325
2012		—		—		—			—			164,743		—		164,743
2013		—		33,000		—			—			160,583		10,500		204,083
2014		—		—		—			266,400	(4)		220,996		—		487,396
2015		—		67,000		375,000			—			75,436		—		517,436
Thereafter		—		75,000		900,000			—			305,098		—		1,280,098
Subtotal	$	341,417	$	200,000	$	1,275,000		$	314,701		$	934,463	$	10,500	$	3,076,081
Unamortized discount		—		—		(9,413	)		(113	)		—		—		(9,526	)
Unamortized premium		—		—		—			—			1,022		—		1,022
Total	$	341,417	$	200,000	$	1,265,587		$	314,588		$	935,485	$	10,500	$	3,067,577

⁽¹⁾ Subject to a one-year extension option exercisable by us. The bank group is obligated to grant the extension option provided we give proper notice, we make certain representations and warranties and no default exists under the revolving credit facility.

⁽²⁾ Our mortgage loans are generally non-recourse to us, subject to carve outs for specified actions by us or specified undisclosed environmental liabilities. As of June 30, 2011, we had provided limited recourse guarantees with respect to approximately $60.1 million principal amount of the outstanding mortgage indebtedness, and partial letter of credit support with respect to approximately an additional $47.3 million of the outstanding mortgage indebtedness.

⁽³⁾ Assumes maturity of the 2026 Debentures at first redemption date in August 2011.

⁽⁴⁾ Assumes maturity of the 2029 Debentures at first redemption date in April 2014.

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Condensed Consolidated Statement of Equity (USD $) In Thousands, except Share data	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Dividends in Excess of Earnings [Member]	Accumulated Other Comprehensive Loss, net [Member]	Total Stockholders' Equity [Member]	Noncontrolling Interests in Operating Partnership [Member]	Noncontrolling Interests in Consolidated Joint Ventures [Member]	Total Noncontrolling Interests [Member]	Total
Balance at Dec. 31, 2010	$ 502,341	$ 909	$ 1,849,497	$ (348,148)	$ (42,081)	$ 1,962,518	$ 52,436	$ 39,709	$ 92,145	$ 2,054,663
Balance (shares) at Dec. 31, 2010		91,159,221
Conversion of units to common stock		6	6,428			6,434	(6,434)		(6,434)
Conversion of units to common stock (shares)		558,970
Issuance of restricted stock, net of forfeitures (shares)		79,848
Net proceeds from sale of common stock		29	176,237			176,266				176,266
Net proceeds from sale of common stock (shares)		2,967,545
Exercise of stock options		1	3,052			3,053				3,053
Exercise of stock options (shares)		80,303								80,303
Issuance of common stock in exchange for debentures		4	(11,445)			(11,441)				(11,441)
Issuance of common stock in exchange for debentures (shares/units)		372,068
Conversion of preferred stock	(144,955)	35	144,920
Conversion of preferred stock (shares)		3,536,772
Amortization of unearned compensation regarding share based awards			8,031			8,031				8,031
Reclassification of vested share based awards			(6,381)			(6,381)	6,381		6,381
Dividends declared on preferred stock				(11,235)		(11,235)				(11,235)
Dividends and distributions on common stock and common and incentive units				(129,490)		(129,490)	(7,339)		(7,339)	(136,829)
Contributions from noncontrolling interest in consolidated joint ventures								42	42	42
Purchase of noncontrolling interests in consolidated joint venture			(26,720)			(26,720)		(26,520)	(26,520)	(53,240)
Net income				74,205		74,205	3,234	(199)	3,035	77,240
Other comprehensive income - foreign currency translation adjustments					23,800	23,800	1,237		1,237	25,037
Other comprehensive income - fair value of interest rate swaps					(907)	(907)	(40)		(40)	(947)
Other comprehensive income - reclassification of accumulated other comprehensive loss to interest expense					3,019	3,019	155		155	3,174
Balance at Jun. 30, 2011	$ 357,386	$ 984	$ 2,143,619	$ (414,668)	$ (16,169)	$ 2,071,152	$ 49,630	$ 13,032	$ 62,662	$ 2,133,814
Balance (shares) at Jun. 30, 2011		98,754,727

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Fair Value of Instruments

6 Months Ended

Jun. 30, 2011

Fair Value of Instruments

Fair Value of Instruments

14. Fair Value of Instruments

We disclose fair value information about all financial instruments, whether or not recognized in the condensed consolidated balance sheets, for which it is practicable to estimate fair value.

Current accounting guidance requires the Company to disclose fair value information about all financial instruments, whether or not recognized in the balance sheets, for which it is practicable to estimate fair value. The Company's disclosures of estimated fair value of financial instruments at June 30, 2011 and December 31, 2010 were determined using available market information and appropriate valuation methods. Considerable judgment is necessary to interpret market data and develop estimated fair value. The use of different market assumptions or estimation methods may have a material effect on the estimated fair value amounts.

The carrying amounts for cash and cash equivalents, restricted cash, accounts and other receivables, accounts payable and other accrued liabilities, security deposits and prepaid rents approximate fair value because of the short-term nature of these instruments. As described in note 13, the interest rate cap and interest rate swaps are recorded at fair value.

We calculate the fair value of our mortgage loans, unsecured senior notes and exchangeable senior debentures based on currently available market rates assuming the loans are outstanding through maturity and considering the collateral and other loan terms, including excess exchange value which exists related to our 2026 Debentures. In determining the current market rate for fixed rate debt, a market spread is added to the quoted yields on federal government treasury securities with similar maturity dates to debt. The carrying value of our revolving credit facility approximates fair value, due to the short-term nature of this instrument along with the variability of interest rates.

As of June 30, 2011 and December 31, 2010, the aggregate estimated fair value and carrying value of our revolving credit facility, unsecured senior notes, exchangeable senior debentures, mortgage loans and other secured loan were as follows (in thousands):

	As of June 30, 2011				As of December 31, 2010
	Estimated Fair Value		Carrying Value		Estimated Fair Value		Carrying Value
Revolving credit facility (1)	$	341,417	$	341,417	$	333,534	$	333,534
Unsecured senior notes (2)(3)		1,535,735		1,465,587		1,103,983		1,066,030
Exchangeable senior debentures (2)(3)		500,134		314,588		504,241		353,702
Mortgage loans (2)		986,894		935,485		1,078,220		1,043,188
Other secured loan		10,725		10,500		10,720		10,500
	$	3,374,905	$	3,067,577	$	3,030,698	$	2,806,954

(1) The carrying value of our revolving credit facility approximates estimated fair value, due to the short-term nature of this instrument along with the variability of interest rates.

(2) Valuations for our unsecured senior notes and mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2015 Notes, 2020 Notes and 2021 Notes and exchangeable senior debentures are valued based on quoted market prices.

(3) The carrying value of the 2015 Notes, 2020 Notes and 2021 Notes are net of discount of $9,413 and $8,970 in the aggregate as of June 30, 2011 and December 31, 2010, respectively. The carrying values of our exchangeable senior debentures are net of discount of $113 and $1,456 as of June 30, 2011 and December 31, 2010, respectively, related to our 2026 Debentures.

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Debt of the Operating Partnership (Revolving Credit Facility) (Narrative) (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010	Jun. 30, 2011		Jun. 30, 2010	Dec. 31, 2010
Revolving credit facility maturity date				August 31, 2011
Balance/Principal Outstanding	$ 341,400,000			$ 341,400,000
Revolving Credit Facility [Member]
Revolving credit facility borrowing capacity	750,000,000			750,000,000
Line of credit facility, revolving credit, description				The bank group is obligated to grant the extension option provided we give proper notice, we make certain representations and warranties and no default exists under the revolving credit facility
Revolving credit facility commitments extension (years)				1
Line of credit facility interest rate description				As of June 30, 2011, borrowings under the revolving credit facility bore interest at a blended rate of 1.39% (U.S), 2.50% (Euro) and 1.83% (GBP), which are based on 1-month LIBOR, 1-month EURIBOR and 1-month GBP LIBOR, respectively, plus a margin of 1.20%
Sub-facility borrowing capacity	515,000,000			515,000,000
Balance/Principal Outstanding	341,417,000	[1]		341,417,000	[1]		333,534,000	[1]
Letter of credit security amount	30,500,000			30,500,000
Maximum distribution of funds from operations, percentage				95.00%
Interest costs, capitalized during period	$ 4,200,000		$ 2,500,000	$ 8,900,000		$ 4,400,000

[1] Balances as of June 30, 2011 and December 31, 2010 are as follows (balances, in thousands):

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2011

Commitments and Contingencies

Commitments and Contingencies

16. Commitments and Contingencies

We have agreed with the seller of 350 East Cermak Road to share a portion, not to exceed $135,000 per month, of rental revenue, adjusted for our costs to lease the premises, from the leases of the 192,000 square feet of space held for redevelopment. This revenue sharing agreement will terminate in May 2012. We made payments of approximately $0.8 million and $3.8 million to the seller during the six months ended June 30, 2011 and 2010, respectively. We have recorded approximately $1.5 million and $2.3 million for this contingent liability on our consolidated balance sheet at June 30, 2011 and December 31, 2010, respectively.

As part of the acquisition of Clonshaugh Industrial Estate I, we entered into an agreement with the seller whereby the seller is entitled to receive 40% of the net rental income generated by the existing building after we have received a 9% return on all capital invested in the property. As of February 6, 2006, the date we acquired this property, we have estimated the present value of these expected payments over the 10 year lease term to be approximately $1.1 million and this value has been recorded as a component of the purchase price. Accounts payable and other liabilities include $1.4 million and $1.3 million for this liability as of June 30, 2011 and December 31, 2010, respectively. We made payments of $0.1 million to the seller during the six months ended June 30, 2011 and 2010.

Our properties require periodic investments of capital for tenant-related capital expenditures and for general capital improvements and from time to time in the normal course of our business, we enter into various construction contracts with third parties that may obligate us to make payments. At June 30, 2011, we had open commitments related to construction contracts of approximately $119.2 million.

As part of the acquisition of 29A International Business Park, the seller could earn additional consideration based on future net operating income growth in excess of certain performance targets, as defined. As of June 30, 2011, construction is not complete and there have been no leases executed that would cause an amount to become probable of payment and therefore no amount is accrued as of June 30, 2011. The maximum amount that could be earned by the seller is S$50.0 million (or approximately $40.7 million based on the exchange rate as of June 30, 2011). The earnout contingency expires in November 2020.

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Incentive Plan (Class C Profits Interest Units) (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 02, 2007	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	May 01, 2010
Vesting based on market conditions with respect to the first measurement date not achieved				The service conditions of the awards provide for 20% vesting on each of the first and second anniversaries of the grant date and 30% vesting on each of the third and fourth anniversaries of the grant date
Common Stock, shares outstanding		98,754,727		98,754,727		91,159,221
Class C Profit Units [Member]
Vesting based on market conditions with respect to the first measurement date not achieved				Of the Class C Units that satisfied the market condition on May 1, 2010, 60% vested on May 1, 2010 and the remaining 40% will vest ratably each month thereafter for 24 months
Class C units satisfying market conditions							613,485
Expected term (months)				36
Expected volatility rate				23.00%
Risk free interest rate				4.60%
Expected dividend rate				5.00%
Award limit, first market condition				$ 17
Award limit, second market condition				40
Common Stock, shares outstanding	69,200,000
Grant date fair value of awards	11.8
Period of recognition in compensation expense (years)	5
Unearned compensation due to the unvested portion of Class C Profits Interest Units				1.9		2.9
Number of vested awards				497,023		439,653
Stock option expense		0.5	0.5	1.1	0.9
Capitalized expense related to construction and leasing activities		$ 0.1		$ 0.1

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Capital and Comprehensive Income (Schedule of Dividends Declared and Payable) (Details) (Digital Realty Trust, L.P. [Member], USD $) In Thousands, except Per Share data	6 Months Ended
	Jun. 30, 2011
Common Units [Member] | February 10, 2011 [Member]
Dividends/Distributions, common stock/units	$ 66,252	[1]
February 10, 2011 [Member]
Date distribution declared	Feb. 10, 2011
Distribution payable date	Mar. 31, 2011
February 10, 2011 [Member] | Series C Preferred Units [Member]
Dividends/Distributions, preferred stock/units	1,832	[2]
February 10, 2011 [Member] | Series D Preferred Units [Member]
Dividends/Distributions, preferred stock/units	4,690	[3]
Common Units [Member] | April 25, 2011 [Member]
Dividends/Distributions, common stock/units	70,577	[1]
April 25, 2011 [Member]
Date distribution declared	Apr. 25, 2011
Distribution payable date	Jun. 30, 2011
April 25, 2011 [Member] | Series C Preferred Units [Member]
Dividends/Distributions, preferred stock/units	1,441	[2]
April 25, 2011 [Member] | Series D Preferred Units [Member]
Dividends/Distributions, preferred stock/units	$ 3,272	[3]
Series C Preferred Units [Member]
Preferred Units, annual rate of distribution per unit	$ 1.094
Series D Preferred Units [Member]
Preferred Units, annual rate of distribution per unit	$ 1.375
Common Units [Member]
Common Units, annual rate of distribution per unit	$ 2.720

[1] $2.720 annual rate of distribution per unit.

[2] $1.094 annual rate of distribution per unit.

[3] $1.375 annual rate of distribution per unit.

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Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net income	$ 38,228	$ 19,902	$ 77,240	$ 45,488
Other comprehensive income (loss):
Foreign currency translation adjustments	8,631	(19,232)	25,037	(37,519)
Decrease in fair value of interest rate swaps	(2,453)	(1,820)	(947)	(6,096)
Other comprehensive income - reclassification of accumulated other comprehensive loss to interest expense	1,589	1,741	3,174	3,400
Comprehensive income	45,995	591	104,504	5,273
Comprehensive (income) loss attributable to noncontrolling interests	(1,891)	411	(4,387)	964
Comprehensive income attributable to Digital Realty Trust, Inc./L.P	44,104	1,002	100,117	6,237
Digital Realty Trust, L.P. [Member]
Net income	38,228	19,902	77,240	45,488
Other comprehensive income (loss):
Foreign currency translation adjustments	8,631	(19,232)	25,037	(37,519)
Decrease in fair value of interest rate swaps	(2,453)	(1,820)	(947)	(6,096)
Other comprehensive income - reclassification of accumulated other comprehensive loss to interest expense	1,589	1,741	3,174	3,400
Comprehensive income	$ 45,995	$ 591	$ 104,504	$ 5,273

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Income per Unit

6 Months Ended

Jun. 30, 2011

Income per Unit

Income per Unit

8. Income per Unit

The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts):

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Net income available to common unitholders	$	33,572	$	9,651	$	66,204	$	25,368
Weighted average units outstanding—basic		101,056,387		86,149,647		98,698,968		84,699,431
Potentially dilutive common units:
Stock options		203,078		225,931		193,985		206,803
Class C Units (2007 Grant)		73,855		154,229		67,856		142,747
Unvested incentive units		180,377		179,267		152,927		155,504
Excess exchange value of the 2026 Debentures		758,916		1,920,061		722,782		1,781,415
Weighted average units outstanding—diluted		102,272,613		88,629,135		99,836,518		86,985,900
Income per unit:
Basic	$	0.33	$	0.11	$	0.67	$	0.30
Diluted	$	0.33	$	0.11	$	0.66	$	0.29

On or after July 15, 2026, the 2026 Debentures may be exchanged at the then-applicable exchange rate for cash (up to the principal amount of the 2026 Debentures) and, with respect to any excess exchange value, into cash, shares of Digital Realty Trust, Inc. common stock or a combination of cash and shares of Digital Realty Trust, Inc. common stock. Pursuant to the terms of the Operating Partnership's agreement of limited partnership, the Operating Partnership will deliver to Digital Realty Trust, Inc. one common unit for each share of common stock issuable upon exchange of the 2026 Debentures. The 2026 Debentures are also exchangeable prior to July 15, 2026, but only upon the occurrence of certain specified events. During the three and six months ended June 30, 2011, the weighted average common stock price exceeded the strike price as of June 30, 2011 of $30.99. Therefore, using the treasury method, 758,916 and 722,782 common units contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common units in determining diluted earnings per unit for the three and six months ended June 30, 2011, respectively. During the three and six months ended June 30, 2010, the weighted average common stock price exceeded the strike price as of June 30, 2010 of $31.84. Therefore, using the treasury method, 1,920,061 and 1,781,415 common units contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common units in determining diluted earnings per unit for the three and six months ended June 30, 2010, respectively.

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Potentially dilutive outstanding stock options		—		—		—		5,346
Potentially dilutive 2029 Debentures		6,289,434		6,195,345		6,279,766		6,195,345
Potentially dilutive Series C Cumulative Convertible Preferred Units		2,864,660		3,657,477		3,256,316		3,657,477
Potentially dilutive Series D Cumulative Convertible Preferred Units		6,418,585		8,237,540		7,370,713		8,226,381
		15,572,679		18,090,362		16,906,795		18,084,549

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Income per Share (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Income per Share
Strike price	$ 30.99	$ 31.84	$ 30.99	$ 31.84
Shares of common stock contingently issuable	758,916	1,920,061	722,782	1,781,415

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Income per Unit (Summary of Basic and Diluted Earnings per Share) (Details) (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net income available to common unitholders	$ 31,990	$ 9,091	$ 62,970	$ 23,835
Weighted average units outstanding-basic	96,295,585	80,542,329	93,875,415	79,164,167
Stock options	203,078	225,931	193,985	206,803
Class C Units (2007 Grant)	73,855	154,229	67,856	142,747
Unvested incentive units	180,377	179,267	152,927	155,504
Excess exchange value of the 2026 Debentures	758,916	1,920,061	722,782	1,781,415
Weighted average units outstanding-diluted	97,511,811	83,021,817	95,012,965	81,450,636
Basic	$ 0.33	$ 0.11	$ 0.67	$ 0.30
Diluted	$ 0.33	$ 0.11	$ 0.66	$ 0.29
Digital Realty Trust, L.P. [Member]
Net income available to common unitholders	$ 33,572	$ 9,651	$ 66,204	$ 25,368
Weighted average units outstanding-basic	101,056,387	86,149,647	98,698,968	84,699,431
Stock options	203,078	225,931	193,985	206,803
Class C Units (2007 Grant)	73,855	154,229	67,856	142,747
Unvested incentive units	180,377	179,267	152,927	155,504
Excess exchange value of the 2026 Debentures	758,916	1,920,061	722,782	1,781,415
Weighted average units outstanding-diluted	102,272,613	88,629,135	99,836,518	86,985,900
Basic	$ 0.33	$ 0.11	$ 0.67	$ 0.30
Diluted	$ 0.33	$ 0.11	$ 0.66	$ 0.29

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Capital and Comprehensive Income (Schedule of Comprehensive Income) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Accumulated other comprehensive loss, net, Beginning balance			$ (42,081)
Foreign currency translation adjustments	8,631	(19,232)	25,037	(37,519)
Decrease in fair value of interest rate swaps	(2,453)	(1,820)	(947)	(6,096)
Accumulated other comprehensive loss, net, Ending balance	(16,169)		(16,169)
Digital Realty Trust, L.P. [Member] | Foreign Currency Translation Adjustments [Member]
Foreign currency translation adjustments, Beginning balance			(36,051)
Foreign currency translation adjustments			25,037
Foreign currency translation adjustments, Ending balance	(11,014)		(11,014)
Foreign Currency Translation Adjustments [Member]
Foreign currency translation adjustments, Beginning balance			(33,175)
Foreign currency translation adjustments			23,800
Foreign currency translation adjustments, Ending balance	(9,375)		(9,375)
Digital Realty Trust, L.P. [Member] | Cash Flow Hedge Adjustments [Member]
Cash flow hedge adjustment, Beginning balance			(9,809)
Decrease in fair value of interest rate swaps			(947)
Reclassification to interest expense from interest rate swaps			3,174
Cash flow hedge adjustment, Ending balance	(7,582)		(7,582)
Cash Flow Hedge Adjustments [Member]
Cash flow hedge adjustment, Beginning balance			(8,906)
Decrease in fair value of interest rate swaps			(907)
Reclassification to interest expense from interest rate swaps			3,019
Cash flow hedge adjustment, Ending balance	(6,794)		(6,794)
Digital Realty Trust, L.P. [Member] | Accumulated Other Comprehensive Loss, net [Member]
Accumulated other comprehensive loss, net, Beginning balance			(45,860)
Accumulated other comprehensive loss, net, Net current period change			24,090
Reclassification to interest expense from interest rate swaps			3,174
Accumulated other comprehensive loss, net, Ending balance	(18,596)		(18,596)
Accumulated Other Comprehensive Loss, net [Member]
Accumulated other comprehensive loss, net, Beginning balance			(42,081)
Foreign currency translation adjustments			23,800
Decrease in fair value of interest rate swaps			(907)
Accumulated other comprehensive loss, net, Net current period change			22,893
Reclassification to interest expense from interest rate swaps			3,019
Accumulated other comprehensive loss, net, Ending balance	(16,169)		(16,169)
Digital Realty Trust, L.P. [Member]
Accumulated other comprehensive loss, net, Beginning balance			(45,860)
Foreign currency translation adjustments	8,631	(19,232)	25,037	(37,519)
Decrease in fair value of interest rate swaps	(2,453)	(1,820)	(947)	(6,096)
Accumulated other comprehensive loss, net, Ending balance	$ (18,596)		$ (18,596)

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Incentive Plan (Tables)

6 Months Ended

Jun. 30, 2011

Incentive Plan

Summary of Incentive Award Plan's Stock Options

	Period ended June 30, 2011
	Shares			Weighted average exercise price
Options outstanding, beginning of period		470,264		$	28.35
Exercised		(80,303	)		38.02
Cancelled / Forfeited		(8,727	)		41.73
Options outstanding, end of period		381,234		$	26.01
Exercisable, end of period		317,007		$	22.90

Summary of Stock Option Outstanding and Exercisable

Options outstanding									Options exercisable
Exercise price	Number outstanding		Weighted average remaining contractual life (years)		Weighted average exercise price		Aggregate intrinsic value		Number exercisable		Weighted average remaining contractual life (years)		Weighted average exercise price		Aggregate intrinsic value
$12.00-13.02		182,369		3.33	$	12.01	$	9,077,054		182,369		3.33	$	12.01	$	9,077,054
$20.37-28.09		22,722		4.47		22.98		881,525		22,638		4.46		22.97		878,584
$33.18-41.73		176,143		5.79		40.90		3,677,064		112,000		5.77		40.61		2,370,865
		381,234		4.53	$	26.01	$	13,635,643		317,007		4.27	$	22.90	$	12,326,503

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Incentive Plan

6 Months Ended

Jun. 30, 2011

Incentive Plan

Incentive Plan

12. Incentive Plan

Our 2004 Incentive Award Plan provides for the grant of incentive awards to employees, directors and consultants. Awards issuable under the 2004 Incentive Award Plan include stock options, restricted stock, dividend equivalents, stock appreciation rights, long-term incentive units, cash performance bonuses and other incentive awards. Only employees are eligible to receive incentive stock options under the 2004 Incentive Award Plan. Initially, we had reserved a total of 4,474,102 shares of common stock for issuance pursuant to the 2004 Incentive Award Plan, subject to certain adjustments set forth in the 2004 Incentive Award Plan. On May 2, 2007, Digital Realty Trust, Inc.'s stockholders approved the First Amended and Restated Digital Realty Trust, Inc., Digital Realty Services, Inc. and Digital Realty Trust, L.P. 2004 Incentive Award Plan (as amended, the Amended and Restated 2004 Incentive Award Plan). The Amended and Restated 2004 Incentive Award Plan increases the aggregate number of shares of stock which may be issued or transferred under the plan by 5,000,000 shares to a total of 9,474,102 shares, and provides that the maximum number of shares of stock with respect to awards granted to any one participant during a calendar year will be 1,500,000 and the maximum amount that may be paid in cash during any calendar year with respect to any performance-based award not denominated in stock or otherwise for which the foregoing limitation would not be an effective limitation for purposes of Section 162(m) of the Code will be $10.0 million.

As of June 30, 2011, 3,739,090 shares of common stock or awards convertible into or exchangeable for common stock remained available for future issuance under the Amended and Restated 2004 Incentive Award Plan. Each long-term incentive and Class C unit issued under the Amended and Restated 2004 Incentive Award Plan will count as one share of common stock for purposes of calculating the limit on shares that may be issued under the Amended and Restated 2004 Incentive Award Plan and the individual award limit discussed above.

(a) Long-Term Incentive Units

Long-term incentive units, which are also referred to as profits interest units, may be issued to eligible participants for the performance of services to or for the benefit of the Operating Partnership. Long-term incentive units, whether vested or not, will receive the same quarterly per unit distributions as Operating Partnership common units, which equal per share distributions on Digital Realty Trust, Inc. common stock. Initially, long-term incentive units do not have full parity with common units with respect to liquidating distributions. If such parity is reached, vested long-term incentive units may be converted into an equal number of common units of the Operating Partnership at any time, and thereafter enjoy all the rights of common units of the Operating Partnership, including redemption rights.

In order to achieve full parity with common units, long-term incentive units must be fully vested and the holder's capital account balance in respect of such long-term incentive units must be equal to the capital account balance of a holder of an equivalent number of common units. The capital account balance attributable to each common unit is generally expected to be the same, in part because of the amount credited to a partner's capital account upon the partner's contribution of property to the Operating Partnership, and in part because the partnership agreement provides, in most cases, that allocations of income, gain, loss and deduction (which will adjust the partner's capital accounts) are to be made to the common units on a proportionate basis. As a result, with respect to a number of long-term incentive units, it is possible to determine the capital account balance of an equivalent number of common units by multiplying the number of long-term incentive units by the capital account balance with respect to a common unit.

A partner's initial capital account balance is equal to the amount the partner paid (or contributed to the Operating Partnership) for the partner's units and is subject to subsequent adjustments, including with respect to the partner's share of income, gain or loss of the Operating Partnership. Because a holder of long-term incentive units generally will not pay for the long-term incentive units, the initial capital account balance attributable to such long-term incentive units will be zero. However, the Operating Partnership is required to allocate income, gain, loss and deduction to the partner's capital accounts in accordance with the terms of the partnership agreement, subject to applicable Treasury Regulations. The partnership agreement provides that holders of long-term incentive units will receive special allocations of gain in the event of a sale or "hypothetical sale" of assets of the Operating Partnership prior to the allocation of gain to Digital Realty Trust, Inc. or other limited partners with respect to their common units. The amount of such allocation will, to the extent of any such gain, be equal to the difference between the capital account balance of a holder of long-term incentive units attributable to such units and the capital account balance attributable to an equivalent number of common units. If and when such gain allocation is fully made, a holder of long-term incentive units will have achieved full parity with holders of common units. To the extent that, upon an actual sale or a "hypothetical sale" of the Operating Partnership's assets as described above, there is not sufficient gain to allocate to a holder's capital account with respect to long-term incentive units, or if such sale or "hypothetical sale" does not occur, such units will not achieve parity with common units.

The term "hypothetical sale" refers to circumstances that are not actual sales of the Operating Partnership's assets but that require certain adjustments to the value of the Operating Partnership's assets and the partners' capital account balances. Specifically, the partnership agreement provides that, from time to time, in accordance with applicable Treasury Regulations, the Operating Partnership will adjust the value of its assets to equal their respective fair market values, and adjust the partners' capital accounts, in accordance with the terms of the partnership agreement, as if the Operating Partnership sold its assets for an amount equal to their value. Times for making such adjustments generally include the liquidation of the Operating Partnership, the acquisition of an additional interest in the Operating Partnership by a new or existing partner in exchange for more than a de minimis capital contribution, the distribution by the Operating Partnership to a partner of more than a de minimis amount of partnership property as consideration for an interest in the Operating Partnership, in connection with the grant of an interest in the Operating Partnership (other than a de minimis interest) as consideration for the performance of services to or for the benefit of the Operating Partnership (including the grant of a long-term incentive unit), and at such other times as may be desirable or required to comply with the Treasury Regulations.

During the six months ended June 30, 2011 and 2010, certain employees were granted an aggregate of 84,873 and 92,368 long-term incentive units, respectively. The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock, are being expensed on a straight-line basis over the vesting period of the long-term incentive units, which is four years. During the six months ended June 30, 2011 and 2010, certain employees were also granted an aggregate of 98,632 and 107,993 long-term incentive units, respectively, which, in addition to a service condition, are subject to a performance condition that impacts the number of units in which the employee ultimately vests. The performance condition is based upon our achievement of the respective fiscal years' Funds From Operations per share targets. Upon evaluating the results of the performance condition, the final number of units is determined and such units vest based on satisfaction of the service conditions. The service conditions of the awards provide for 20% vesting on each of the first and second anniversaries of the grant date and 30% vesting on each of the third and fourth anniversaries of the grant date, provided the grantee continues employment on each anniversary date. Based on our 2010 FFO per diluted share and unit, all of the 2010 long-term incentive units satisfied the performance condition. The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock, are being expensed on a straight-line basis over the vesting period of the long-term incentive units, which ranges from four to five years.

The expense recorded for the three months ended June 30, 2011 and 2010 related to long-term incentive units was approximately $2.5 million and $2.2 million, respectively, and approximately $4.4 million and $3.4 million for the six months ended June 30, 2011 and 2010, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.2 million and $0.2 million for the three months ended June 30, 2011 and 2010,respectively, and approximately $0.4 million and $0.5 million for the six months ended June 30, 2011 and 2010, respectively. Unearned compensation representing the unvested portion of the long-term incentive units totaled $18.2 million and $12.9 million as of June 30, 2011 and December 31, 2010, respectively. We expect to recognize this unearned compensation over the next 2.8 years on a weighted average basis.

(b) Class C Profits Interest Units

On May 2, 2007, we granted awards of Class C Profits Interest Units of the Operating Partnership or similar stock-based performance awards, which we refer to collectively as the Class C Units, under the Amended and Restated 2004 Incentive Award Plan (2007 Grant) to each of our named executive officers and certain other officers and employees.

The Class C Units subject to this award were subject to vesting based on the achievement of a total stockholder return (which we refer to as the market condition) as measured on November 1, 2008 (which we refer to as the first measurement date) and May 1, 2010 (which we refer to as the second measurement date). If:

• with respect to the first measurement date, we achieved a total shareholder return equal to at least 18% over the period commencing on May 2, 2007 and ending on November 1, 2008; and

• with respect to the second measurement date, we achieved a total shareholder return equal to at least 36% over a period commencing on May 2, 2007 and ending on the earlier of May 1, 2010 and the date of a change in control of our company,

the aggregate amount of the 2007 Grant award was equal to 8% of the excess shareholder value, as defined, created during the applicable performance period, but in no event in excess of:

• $17 million for the first measurement date; or

• $40 million (less the amount of the award pool as of the first measurement date) for the second measurement date.

We previously determined that the market condition with respect to the first measurement date was not achieved. On May 1, 2010, we determined that 613,485 of the Class C Units subject to the 2007 Grant satisfied the market condition on the second measurement date (May 1, 2010), with the value of these units equal to the maximum amount of the award pool payable pursuant to the 2007 Grant on the second measurement date. Of the Class C Units that satisfied the market condition on May 1, 2010, 60% vested on May 1, 2010 and the remaining 40% will vest ratably each month thereafter for 24 months.

The fair value of the 2007 Grant was measured on the grant date using a Monte Carlo simulation to estimate the probability of the multiple market conditions being satisfied. The Monte Carlo simulation uses a statistical formula underlying the Black-Scholes and binomial formulas, and such simulation was run approximately 100,000 times. For each simulation, the value of the payoff was calculated at the settlement date and was then discounted to the grant date at a risk-free interest rate. The expected value of the Class C units on the grant date was determined by multiplying the average of the values over all simulations by the number of outstanding shares of Digital Realty Trust, Inc. common stock and Operating Partnership units. The valuation was performed in a risk-neutral framework, so no assumption was made with respect to an equity risk premium. Other significant assumptions used in the valuation included an expected term of 36 months, expected stock price volatility of 23%, a risk-free interest rate of 4.6%, and a dividend growth rate of 5.0 percent. The fixed award limit under the plan is $17 million for the first market condition and $40 million for the second market condition, and there were 69.2 million shares of Digital Realty Trust, Inc. common stock and Operating Partnership units outstanding as of the 2007 grant date. The grant date fair value of these awards of approximately $11.8 million will be recognized as compensation expense on a straight-line basis over the expected service period of five years. The unearned compensation as of June 30, 2011 and December 31, 2010 was $1.9 million and $2.9 million, respectively. As of June 30, 2011 and December 31, 2010, 497,023 and 439,653, respectively, of the Class C Units subject to the 2007 Grant had vested. We recognized compensation expense related to the Class C Units subject to the 2007 Grant of approximately $0.5 million and $0.5 million for the three months ended June 30, 2011 and 2010, respectively, and approximately $1.1 million and $0.9 million for the six months ended June 30, 2011 and 2010, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.1 million for the three months ended June 30, 2011 and 2010 and approximately $0.1 million for the six months ended June 30, 2011 and 2010, respectively.

(c) Stock Options

The fair value of each option granted under the Amended and Restated 2004 Incentive Award Plan is estimated on the date of the grant using the Black-Scholes option-pricing model. For the three and six months ended June 30, 2011 and 2010, no stock options were granted. The fair values are being expensed on a straight-line basis over the vesting period of the options, which ranges from four to five years. The expense recorded for the three months ended June 30, 2011 and 2010, respectively, was approximately $0.2 million and approximately $0.4 million and $0.5 million for the six months ended June 30, 2011 and 2010, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.1 million for the three months ended June 30, 2011 and 2010 and approximately $0.1 million for the six months ended June 30, 2011 and 2010. Unearned compensation representing the unvested portion of the stock options totaled $0.8 million and $1.3 million as of June 30, 2011 and December 31, 2010, respectively. We expect to recognize this unearned compensation over the next 0.7 years on a weighted average basis.

The following table summarizes the Amended and Restated 2004 Incentive Award Plan's stock option activity for the six months ended June 30, 2011:

	Period ended June 30, 2011
	Shares			Weighted average exercise price
Options outstanding, beginning of period		470,264		$	28.35
Exercised		(80,303	)		38.02
Cancelled / Forfeited		(8,727	)		41.73
Options outstanding, end of period		381,234		$	26.01
Exercisable, end of period		317,007		$	22.90

The following table summarizes information about stock options outstanding and exercisable as of June 30, 2011:

Options outstanding									Options exercisable
Exercise price	Number outstanding		Weighted average remaining contractual life (years)		Weighted average exercise price		Aggregate intrinsic value		Number exercisable		Weighted average remaining contractual life (years)		Weighted average exercise price		Aggregate intrinsic value
$12.00-13.02		182,369		3.33	$	12.01	$	9,077,054		182,369		3.33	$	12.01	$	9,077,054
$20.37-28.09		22,722		4.47		22.98		881,525		22,638		4.46		22.97		878,584
$33.18-41.73		176,143		5.79		40.90		3,677,064		112,000		5.77		40.61		2,370,865
		381,234		4.53	$	26.01	$	13,635,643		317,007		4.27	$	22.90	$	12,326,503

(d) Restricted Stock

During the six months ended June 30, 2011 and 2010, certain employees were granted an aggregate of 40,807 and 31,164 shares of restricted stock, respectively. The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock, are being expensed on a straight-line basis over the vesting period of the restricted stock, which is four years. During the six months ended June 30, 2011 and 2010, certain employees were also granted an aggregate of 50,999 and 37,914 shares of restricted stock, respectively, which, in addition to a service condition, are subject to a performance condition that impacts the number of shares in which the employee ultimately vests. The performance condition is based upon our achievement of the respective year's FFO per share targets. Upon evaluating the results of the performance condition, the final number of shares is determined and such shares vest based on satisfaction of the service conditions. The service conditions of the awards provide for 20% vesting on each of the first and second anniversaries of the grant date and 30% vesting on each of the third and fourth anniversaries of the grant date provided the grantee continues employment on each anniversary date. Based on our 2010 FFO per diluted share and unit, all of the 2010 restricted stock satisfied the performance condition.

The expense recorded for the three months ended June 30, 2011 and 2010 related to grants of restricted stock was approximately $0.5 million and $0.4 million, respectively, and approximately $1.0 million and $0.7 million for the six months ended June 30, 2011 and 2010, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.4 million and $0.3 million for the three months ended June 30, 2011 and 2010, respectively, and approximately $0.7 million and $0.4 million for the six months ended June 30, 2011 and 2010, respectively. Unearned compensation representing the unvested portion of the restricted stock totaled $7.1 million and $4.2 million as of June 30, 2011 and December 31, 2010, respectively. We expect to recognize this unearned compensation over the next 3.2 years on a weighted average basis.

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Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Land	$ 498,522	$ 478,629
Acquired ground leases	6,796	6,374
Buildings and improvements	4,820,275	4,459,047
Tenant improvements	290,643	283,492
Total investments in properties	5,616,236	5,227,542
Accumulated depreciation and amortization	(781,871)	(660,700)
Net investments in properties	4,834,365	4,566,842
Investment in unconsolidated joint ventures	18,145	17,635
Net investments in real estate	4,852,510	4,584,477
Cash and cash equivalents	27,900	11,719
Accounts and other receivables, net of allowance for doubtful accounts of $1,955 and $3,250 as of June 30, 2011 and December 31, 2010, respectively	83,672	70,337
Deferred rent	218,318	190,067
Acquired above market leases, net	34,506	40,539
Acquired in place lease value and deferred leasing costs, net	322,793	334,366
Deferred financing costs, net	21,821	22,825
Restricted cash	56,928	60,062
Other assets	39,957	15,091
Total assets	5,658,405	5,329,483
LIABILITIES AND EQUITY
Revolving credit facility	341,417	333,534
Unsecured senior notes, net of discount	1,465,587	1,066,030
Exchangeable senior debentures, net of discount	314,588	353,702
Mortgage loans, net of premiums	935,485	1,043,188
Other secured loan	10,500	10,500
Accounts payable and other accrued liabilities	284,284	237,631
Accrued dividends and distributions		51,210
Acquired below market leases, net	84,518	93,250
Security deposits and prepaid rents	88,212	85,775
Total liabilities	3,524,591	3,274,820
Commitments and contingencies
Preferred Stock: $0.01 par value, 30,000,000 authorized:
Series C Cumulative Convertible Preferred Stock, 4.375%, $131,775 and $174,999 liquidation preference, respectively ($25.00 per share), 5,270,980 and 6,999,955 issued and outstanding as of June 30, 2011 and December 31, 2010, respectively	127,312	169,067
Series D Cumulative Convertible Preferred Stock, 5.500%, $237,940 and $344,683 liquidation preference, respectively ($25.00 per share), 9,517,580 and 13,787,300 issued and outstanding as of June 30, 2011 and December 31, 2010, respectively	230,074	333,274
Common Stock: $0.01 par value, 145,000,000 authorized, 98,754,727 and 91,159,221 shares issued and outstanding as of June 30, 2011 and December 31, 2010, respectively	984	909
Additional paid-in capital	2,143,619	1,849,497
Dividends in excess of earnings	(414,668)	(348,148)
Accumulated other comprehensive loss, net	(16,169)	(42,081)
Total stockholders' equity	2,071,152	1,962,518
Noncontrolling Interests:
Noncontrolling interests in operating partnership	49,630	52,436
Noncontrolling interests in consolidated joint ventures	13,032	39,709
Total capital	2,133,814	2,054,663
Total noncontrolling interests	62,662	92,145
Total equity	2,133,814	2,054,663
Total liabilities and equity	5,658,405	5,329,483
Digital Realty Trust, L.P. [Member]
ASSETS
Land	498,522	478,629
Acquired ground leases	6,796	6,374
Buildings and improvements	4,820,275	4,459,047
Tenant improvements	290,643	283,492
Total investments in properties	5,616,236	5,227,542
Accumulated depreciation and amortization	(781,871)	(660,700)
Net investments in properties	4,834,365	4,566,842
Investment in unconsolidated joint ventures	18,145	17,635
Net investments in real estate	4,852,510	4,584,477
Cash and cash equivalents	27,900	11,719
Accounts and other receivables, net of allowance for doubtful accounts of $1,955 and $3,250 as of June 30, 2011 and December 31, 2010, respectively	83,672	70,337
Deferred rent	218,318	190,067
Acquired above market leases, net	34,506	40,539
Acquired in place lease value and deferred leasing costs, net	322,793	334,366
Deferred financing costs, net	21,821	22,825
Restricted cash	56,928	60,062
Other assets	39,957	15,091
Total assets	5,658,405	5,329,483
LIABILITIES AND EQUITY
Revolving credit facility	341,417	333,534
Unsecured senior notes, net of discount	1,465,587	1,066,030
Exchangeable senior debentures, net of discount	314,588	353,702
Mortgage loans, net of premiums	935,485	1,043,188
Other secured loan	10,500	10,500
Accounts payable and other accrued liabilities	284,284	237,631
Accrued dividends and distributions		51,210
Acquired below market leases, net	84,518	93,250
Security deposits and prepaid rents	88,212	85,775
Total liabilities	3,524,591	3,274,820
Commitments and contingencies
Preferred Stock: $0.01 par value, 30,000,000 authorized:
5,270,980 and 6,999,955 Series C Cumulative Convertible preferred units issued and outstanding, respectively, 9,517,580 and 13,787,300 Series D Cumulative Convertible preferred units issued and outstanding, respectively as of June 30, 2011 and December 31, 2010, all with a $25.00 liquidation preference per preferred unit (liquidation preference of $369,715 and $519,681, respectively)	357,386	502,341
98,754,727 and 91,159,221 common units issued and outstanding, respectively	1,729,935	1,502,258
Limited partners, 3,430,814 and 3,937,827 common units, 1,092,184 and 982,618 profits interest units and 511,848 and 543,004 class C units outstanding as of June 30, 2011 and December 31, 2010, respectively	52,057	56,215
Accumulated other comprehensive loss, net	(18,596)	(45,860)
Total partners' capital	2,120,782	2,014,954
Noncontrolling Interests:
Noncontrolling interests in consolidated joint ventures	13,032	39,709
Total capital	2,133,814	2,054,663
Total liabilities and capital	$ 5,658,405	$ 5,329,483

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Fair Value of Instruments (Tables)

6 Months Ended

Jun. 30, 2011

Fair Value of Instruments

Estimated Fair Value and Carrying Amounts

	As of June 30, 2011				As of December 31, 2010
	Estimated Fair Value		Carrying Value		Estimated Fair Value		Carrying Value
Revolving credit facility (1)	$	341,417	$	341,417	$	333,534	$	333,534
Unsecured senior notes (2)(3)		1,535,735		1,465,587		1,103,983		1,066,030
Exchangeable senior debentures (2)(3)		500,134		314,588		504,241		353,702
Mortgage loans (2)		986,894		935,485		1,078,220		1,043,188
Other secured loan		10,725		10,500		10,720		10,500
	$	3,374,905	$	3,067,577	$	3,030,698	$	2,806,954

(1) The carrying value of our revolving credit facility approximates estimated fair value, due to the short-term nature of this instrument along with the variability of interest rates.

(2) Valuations for our unsecured senior notes and mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2015 Notes, 2020 Notes and 2021 Notes and exchangeable senior debentures are valued based on quoted market prices.

(3) The carrying value of the 2015 Notes, 2020 Notes and 2021 Notes are net of discount of $9,413 and $8,970 in the aggregate as of June 30, 2011 and December 31, 2010, respectively. The carrying values of our exchangeable senior debentures are net of discount of $113 and $1,456 as of June 30, 2011 and December 31, 2010, respectively, related to our 2026 Debentures.

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Related Party Transactions (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Lease expiration, date			2026
Increase to rental revenues	$ 202,806,000	$ 156,831,000	$ 399,601,000	$ 308,138,000
Deferred rent	218,318,000		218,318,000		190,067,000
Deferred leasing cost	21,821,000		21,821,000		22,825,000
Deferred rent and unamortized deferred leasing costs	28,300,000		28,300,000		21,000,000
Minimum [Member]
Lease expiration, date			2013
Maximum [Member]
Lease expiration, date			2025
Tel(x) [Member]
Number of leases agreement			10
Increase to rental revenues	10,700,000	5,800,000	19,500,000	10,900,000
Square foot of net rentable space			254,314		202,987
Lease agreements			39		31
"Percentage rent" Lease revenue earned	600,000	400,000	700,000	400,000
SoftLayer [Member]
Number of leases agreement			7
Increase to rental revenues	$ 4,600,000	$ 400,000	$ 6,900,000	$ 400,000
Number of leases agreement for the current period			6
Number of leases agreement for future period			1

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Incentive Plan (Summary of Incentive Award Plan's Stock Options) (Details) (USD $)	6 Months Ended
	Jun. 30, 2011
Incentive Plan
Options outstanding, beginning of period, Shares	470,264
Exercised, Shares	(80,303)
Cancelled / Forfeited, Shares	(8,727)
Options outstanding, end of period, Shares	381,234
Exercisable, end of period, Shares	317,007
Options outstanding, beginning of period, Weighted average exercise price	$ 28.35
Exercised, Weighted average exercise price	$ 38.02
Cancelled / Forfeited, Weighted average exercise price	$ 41.73
Options outstanding, end of period, Weighted average exercise price	$ 26.01
Exercisable, end of period, Weighted average exercise price	$ 22.90

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Debt of the Operating Partnership (Unsecured Senior Notes) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Subtotal	$ 3,076,081
Unamortized discounts	(9,526)
Unsecured senior notes, net of discount	1,465,587	1,066,030
Prudential Shelf Facility [Member]
Subtotal	200,000	200,000
Prudential Shelf Facility [Member] | Series A [Member]
Interest Rate at June 30, 2011	7.00%
Maturity Date	Jul. 24, 2011
Subtotal	25,000	25,000
Prudential Shelf Facility [Member] | Series B [Member]
Interest Rate at June 30, 2011	9.32%
Maturity Date	Nov. 05, 2013
Subtotal	33,000	33,000
Prudential Shelf Facility [Member] | Series D [Member]
Interest Rate at June 30, 2011	4.57%
Maturity Date	Jan. 20, 2015
Subtotal	50,000	50,000
Prudential Shelf Facility [Member] | Series C [Member]
Interest Rate at June 30, 2011	9.68%
Maturity Date	Jan. 06, 2016
Subtotal	25,000	25,000
Prudential Shelf Facility [Member] | Series E [Member]
Interest Rate at June 30, 2011	5.73%
Maturity Date	Jan. 20, 2017
Subtotal	50,000	50,000
Prudential Shelf Facility [Member] | Series F [Member]
Interest Rate at June 30, 2011	4.50%
Maturity Date	Feb. 03, 2015
Subtotal	17,000	17,000
Senior Notes [Member]
Subtotal	1,275,000
Unamortized discounts	(9,413)	(8,970)
Principal Outstanding (Senior notes)	1,265,587	866,030
Unsecured senior notes, net of discount	1,465,587	1,066,030
Senior Notes [Member] | 5.875% Notes due 2020 [Member]
Interest Rate at June 30, 2011	5.875%
Maturity Date	Feb. 01, 2020
Principal Outstanding (Senior notes)	500,000	500,000
Senior Notes [Member] | 4.50% Notes due 2015 [Member]
Interest Rate at June 30, 2011	4.50%
Maturity Date	Jul. 15, 2015
Principal Outstanding (Senior notes)	375,000	375,000
Senior Notes [Member] | 5.250% Notes due 2021 [Member]
Interest Rate at June 30, 2011	5.25%
Maturity Date	Mar. 15, 2021
Principal Outstanding (Senior notes)	$ 400,000

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Income per Share (Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Potentially dilutive securities	20,333,481	23,054,779	21,730,348	22,958,955
Weighted Average of Operating Partnership Common Units not Owned by Us [Member]
Potentially dilutive securities	4,760,802	4,964,417	4,823,553	4,874,406
Potentially Dilutive Outstanding Stock Options [Member]
Potentially dilutive securities				5,346
Potentially Dilutive 2029 Debentures [Member]
Potentially dilutive securities	6,289,434	6,195,345	6,279,766	6,195,345
Potentially Dilutive Series C Cumulative Convertible Preferred Stock/Units [Member]
Potentially dilutive securities	2,864,660	3,657,477	3,256,316	3,657,477
Potentially Dilutive Series D Cumulative Convertible Preferred Stock/Units [Member]
Potentially dilutive securities	6,418,585	8,237,540	7,370,713	8,226,381

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Capital and Comprehensive Income (Narrative) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Acquisition of noncontrolling ownership in joint venture	$ 53.2
Digital Realty Trust, L.P. [Member]
Redemption value of common units	$ 272.0	$ 244.5

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Debt of the Operating Partnership (Unsecured Senior Notes) (Narrative) (Details) (USD $)	6 Months Ended							6 Months Ended		6 Months Ended		6 Months Ended				6 Months Ended		6 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Jun. 30, 2011 Prudential Shelf Facility [Member]	Dec. 31, 2010 Prudential Shelf Facility [Member]	Dec. 08, 2010 Prudential Shelf Facility [Member]	Jun. 30, 2011 Prudential Shelf Facility [Member] Series D And E [Member]	Jun. 30, 2011 Prudential Shelf Facility [Member] Series D [Member]	Dec. 31, 2010 Prudential Shelf Facility [Member] Series D [Member]	Jun. 30, 2011 Prudential Shelf Facility [Member] Series E [Member]	Dec. 31, 2010 Prudential Shelf Facility [Member] Series E [Member]	Jun. 30, 2011 Prudential Shelf Facility [Member] Series F [Member]	Dec. 31, 2010 Prudential Shelf Facility [Member] Series F [Member]	Jun. 30, 2011 Senior Notes [Member]	Dec. 31, 2010 Senior Notes [Member]	Jun. 30, 2011 Senior Notes [Member] 5.875% Notes due 2020 [Member]	Dec. 31, 2010 Senior Notes [Member] 5.875% Notes due 2020 [Member]	Jun. 30, 2011 Senior Notes [Member] 4.50% Notes due 2015 [Member]	Dec. 31, 2010 Senior Notes [Member] 4.50% Notes due 2015 [Member]	Jun. 30, 2011 Senior Notes [Member] 5.250% Notes due 2021 [Member]
Notes sale date							January 20, 2010					February 3, 2010
Principal amount of the liability component	$ 3,076,081,000			$ 200,000,000	$ 200,000,000		$ 100,000,000	$ 50,000,000	$ 50,000,000	$ 50,000,000	$ 50,000,000	$ 17,000,000	$ 17,000,000	$ 1,275,000,000
Interest Rate at June 30, 2011								4.57%		5.73%		4.50%				5.875%		4.50%		5.25%
Notes issuance date																January 28, 2010		July 8, 2010		March 8, 2011
Senior notes														1,265,587,000	866,030,000	500,000,000	500,000,000	375,000,000	375,000,000	400,000,000
Maturity Date								Jan. 20, 2015		Jan. 20, 2017		Feb. 03, 2015				Feb. 01, 2020		Jul. 15, 2015		Mar. 15, 2021
Interest payable dates																February 1 and August 1		January 15 and July 15		March 15 and September 15
Percentage of purchase price paid																98.296%		99.697%		99.775%
Unamortized discount	9,526,000													9,413,000	8,970,000
Unsecured senior notes, net of discount	1,465,587,000		1,066,030,000											1,465,587,000	1,066,030,000
Original issuance discount	1,498,000	2,256,000														8,500,000		1,100,000		900,000
Underwriting commissions and expenses																4,400,000		3,100,000		3,600,000
Net proceeds from senior notes																487,100,000		370,800,000		395,500,000
Prudential Shelf Facility, maximum borrowing capacity					$ 250,000,000	$ 200,000,000
Debt instrument, covenant description																(1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt		(1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At June 30, 2011		(1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt
Debt instrument, covenant compliance																we were in compliance with each of these financial covenants.		we were in compliance with each of these financial covenants		At June 30, 2011, we were in compliance with each of these financial covenants

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Debt of the Operating Partnership (4.125 Notes) (Narrative) (Details) (USD $)	3 Months Ended			6 Months Ended			12 Months Ended	48 Months Ended
	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2010	Jun. 30, 2011		Jun. 30, 2010	Dec. 31, 2010	Dec. 31, 2010	Aug. 15, 2021	Aug. 16, 2016	Aug. 15, 2011	Aug. 15, 2006
Unsecured Senior Note	$ 3,076,081,000			$ 3,076,081,000
Loss from early extinguishment of debt	(363,000)		(1,541,000)	(978,000)		(1,541,000)
Exchangeable Senior Debentures [Member]
Unsecured Senior Note	314,701,000			314,701,000
Exchangeable Senior Debentures [Member] | 4.125% Exchangeable Senior Debentures due 2026 [Member]
Interest Rate at June 30, 2011	4.125%			4.125%
Unsecured Senior Note	48,300,000			48,300,000
Maturity Date				Aug. 15, 2026	[1]
Right to redeem date	August 18, 2011			August 18, 2011
4.125% Exchangeable Senior Debentures due 2026 [Member]
Notes issuance date				August 15, 2006
Exchangeable senior debenture face amount at time of issuance												172,500,000
Unsecured Senior Note	48,301,000			48,301,000			88,758,000	88,758,000
Debt issuance costs				5,400,000
Interest payable dates	August 15 and February 15			August 15 and February 15
First required interest payment				February 15, 2007
Common stock exchange rate (% of shares per $1,000 in principal)							0.03182%	0.03068%
Reference dividend rate		$ 0.265
Dates which the holders of may require the Operating Partnership to repurchase the debentures									August 15, 2021	August 15, 2016	August 15, 2011
Purchase price/Redemption price percentage of debenture principal							100
Exchange price	$ 30.99			$ 30.99			$ 31.42	$ 31.42
Principal amount of debentures exchanged				40,500,000
Privately issued common stock issued in exchange				372,068
Cash issued in exchange for debentures				52,200,000
Loss from early extinguishment of debt	$ 100,000		$ 1,500,000	$ 700,000		$ 1,500,000

[1] The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of August 15, 2011, August 15, 2016 and August 15, 2021. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on August 18, 2011.

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Debt of the Operating Partnership (Debt Maturities Table) (Details) (USD $)			6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2011 Revolving Credit Facility [Member]		Jun. 30, 2011 Unsecured Senior Notes [Member]	Jun. 30, 2011 Senior Notes [Member]	Dec. 31, 2010 Senior Notes [Member]	Jun. 30, 2011 Exchangeable Senior Debentures [Member]		Dec. 31, 2010 Exchangeable Senior Debentures [Member]	Jun. 30, 2011 Mortgage Loans [Member]		Dec. 31, 2010 Mortgage Loans [Member]	Jun. 30, 2011 Other Secured Loans [Member]	Dec. 31, 2010 Other Secured Loans [Member]
Remainder of 2011	$ 422,325,000		$ 341,417,000	[1]	$ 25,000,000			$ 48,301,000	[2]		$ 7,607,000	[3]
2012	164,743,000										164,743,000	[3]
2013	204,083,000				33,000,000						160,583,000	[3]		10,500,000
2014	487,396,000							266,400,000	[4]		220,996,000	[3]
2015	517,436,000				67,000,000	375,000,000					75,436,000	[3]
Thereafter	1,280,098,000				75,000,000	900,000,000					305,098,000	[3]
Subtotal	3,076,081,000		341,417,000	[1]	200,000,000	1,275,000,000		314,701,000			934,463,000	[3]		10,500,000
Unamortized discounts	(9,526,000)					(9,413,000)	(8,970,000)	(113,000)		(1,456,000)
Unamortized premium	1,022,000										1,022,000	[3]	1,101,000
Revolving credit facility	341,417,000	333,534,000	341,417,000	[1]
Unsecured Senior Note	3,076,081,000		341,417,000	[1]	200,000,000	1,275,000,000		314,701,000			934,463,000	[3]		10,500,000
Senior Notes						1,265,587,000	866,030,000
Exchangeable Senior Debenture	314,588,000	353,702,000						314,588,000		353,702,000
Mortgage Loans	935,485,000	1,043,188,000									935,485,000	[3]	1,043,188,000
Other secured loan	10,500,000	10,500,000												10,500,000	10,500,000
Total indebtedness	3,067,577,000	2,806,954,000
Revolving credit facility commitments extension (years)			1
Limited recourse guarantees											60,100,000
Partial letter of credit											$ 47,300,000

[1] Subject to a one-year extension option exercisable by us. The bank group is obligated to grant the extension option provided we give proper notice, we make certain representations and warranties and no default exists under the revolving credit facility.

[2] Assumes maturity of the 2026 Debentures at first redemption date in August 2011.

[3] Our mortgage loans are generally non-recourse to us, subject to carve outs for specified actions by us or specified undisclosed environmental liabilities. As of June 30, 2011, we had provided limited recourse guarantees with respect to approximately $60.1 million principal amount of the outstanding mortgage indebtedness, and partial letter of credit support with respect to approximately an additional $47.3 million of the outstanding mortgage indebtedness.

[4] Assumes maturity of the 2029 Debentures at first redemption date in April 2014.

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Subsequent Events (Tables)

6 Months Ended

Jun. 30, 2011

Subsequent Events

Schedule of Dividends Declared and Distributions per Unit

Share Class	Series C Preferred Stock		Series D Preferred Stock		Common stock and common unit
Dividend and distribution amount	$	0.273438	$	0.343750	$	0.680000
Dividend and distribution payable date		September 30, 2011		September 30, 2011		September 30, 2011
Dividend payable to shareholders of record on		September 15, 2011		September 15, 2011		September 15, 2011
Annual equivalent rate of dividend and distribution	$	1.094	$	1.375	$	2.720