Dublin, Ireland - September 30, 2009 - Digital Realty Trust, Inc. (NYSE: DLR), the world's largest wholesale data center provider, has announced that it will be speaking at the Gartner Data Center Summit on the importance of total cost of ownership within data center planning. TCO is the aggregation of all the costs associated with the building and operating of a data center over a period of time, and is too often misunderstood or underplayed when creating data center strategies. Jim Smith, chief technology officer at Digital Realty Trust, will illustrate the discussion with different data center models, including DIY, custom builds and Turn-Key Datacenters®.

The presentation will explain the range of elements to be considered and pitfalls that need to be avoided when developing a TCO model. Drawing on a wealth of experience within the industry, and the shared knowledge of his colleagues and customers at Digital Realty Trust, Jim will help outline the range of challenges data center decision makers face. Amongst these is due consideration to appropriate accounting treatments for such large assets - from capital costs and cost of funds to depreciation charges and ascribed value at end of term. He will also present the forgotten cost considerations that fall under real estate expenses such as taxes and charges. The concerns Jim raises will feed into an overall understanding of how to undertake a robust risk assessment which considers all factors from total cost to time of project completion.

Jim Smith:
Jim Smith oversees data center development, the company's efficiency & green strategy, and power procurement & energy management. In the past four years, Jim and the Digital Realty Trust team have delivered more than 300MW of UPS capacity on over 60 data center projects in North America and Europe. This portfolio includes the industry's first LEED Gold certified data center and the UK's first BREEAM certified Excellent data center. Jim has a BSc in Chemistry from Fort Lewis College and an MBA from London Business School. He was named an InfoWorld top 25 CTO of 2008.

About Digital Realty Trust, Inc.
Digital Realty Trust owns, acquires, redevelops, develops and manages technology-related real estate. The Company is focused on providing Turn-Key Datacentre® and Powered Base Building® datacentre solutions for domestic and international tenants across a variety of industry verticals ranging from information technology and internet enterprises, to manufacturing and financial services. Digital Realty Trust's 75 properties, excluding one property held as an investment in an unconsolidated joint venture, contain applications and operations critical to the day-to-day operations of technology industry tenants and corporate enterprise datacentre tenants. Comprising approximately 1.2 million square metres (13.0 million square feet) as of December 31, 2008, including 150,000 square metres (1.6 million square feet) of space held for redevelopment, Digital Realty Trust's portfolio is located in 27 markets throughout Europe and North America. For additional information, please visit Digital Realty Trust's website at http://www.digitalrealtytrust.com/.

About the Gartner Data Center Summit 2009
The Gartner Data Center Summit 2009 will examine short term, medium term and long term cost optimisation opportunities. It will focus on identifying organisational, process and technology opportunities that will put organisations on a path toward managing incessant business change and opportunities for business growth. Additional information is available at www.europe.gartner.com/pcc

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Further information (external website)