Digital Realty Trust, Inc. (NYSE: DLR), a leading owner and manager of corporate datacenters and Internet gateways, has joined The Green Grid (www.thegreengrid.org), a global consortium of companies dedicated to advancing energy efficiency in datacenters and computing ecosystems. As a Contributor Member, Digital Realty Trust’s participation in The Green Grid, and particularly on its technical committee’s working groups, will focus on collaborating with other member companies to help establish best practices in datacenter design and operations to maximize energy efficiency.

“Environmental and business objectives in the datacenter truly align with one another, making green initiatives in our industry doubly impactful. Efforts to reduce energy consumption in datacenters through better design and operations will result in a substantive contribution to The Green Grid’s environmental objectives while having a positive impact on operating costs for businesses by reducing their exposure to increasing energy prices,” said Chris Crosby, Senior Vice President of Sales and Technology of Digital Realty Trust. “We are proud to join The Green Grid and look forward to building on the work of its other members by lending our expertise in efficient datacenter design and operations.”

“With industry leading companies like Digital Realty Trust joining The Green Grid, we can more effectively address the growing datacenter energy efficiency challenges the industry faces now,” said Jim Pappas, a director of The Green Grid. “We are pleased to have Digital Realty Trust become involved as their expertise in creating cost-effective datacenter solutions is vital to our mission.”

Three key objectives of The Green Grid’s technical committees are to:

---Establish standards regarding definition and measurement of datacenter efficiency;

---Provide guidance to datacenter owners and managers regarding best practices for datacenter architecture and planning; and

---Define guidelines that can be adopted industry-wide by datacenter owners and managers to improve energy efficiency during day-to-day operations.

“We welcome the opportunity to share the best practices that we have established in these areas operating our 7.6 million square feet of datacenter space located throughout North America and Europe,” added Mr. Crosby. “An efficiently designed and operated datacenter uses only the resources that it needs. Through our design strategies, building management system software and operating policies, we have established a standard for energy efficiency within our datacenters. The energy savings from these best practices are significant and we believe complement the technologies being developed by the other members of The Green Grid. In addition to our contribution, we look forward to learning and implementing ideas from other members of The Green Grid that will enable us to further refine our operations to achieve even higher levels of energy efficiency.”

About Digital Realty Trust, Inc.

Digital Realty Trust, Inc. owns, acquires, repositions and manages technology-related real estate. Digital Realty Trust’s 62 properties, excluding one property held in an unconsolidated joint venture, contain applications and operations critical to the day-to-day operations of technology industry tenants and corporate enterprise datacenter tenants. Comprising approximately 11.4 million rentable square feet, including 1.7 million square feet of space held for redevelopment, Digital Realty Trust’s portfolio is located in 25 markets throughout North America and Europe. For additional information, please visit the Digital Realty Trust’s website at http://www.digitalrealtytrust.com.