Monday, March 26, 2012

Google Data Centers Measure 2011 PUE at 1.14

Google announced that its trailing 12-month average PUE (power usage effectiveness) was approximately 1.14 -- an improvement from 1.16 in 2010. PUE is a ratio of the total power used to run a data center to the amount used to power the servers.

Google said its calculation includes everything that contributes to energy consumption in its data center -- not just power for servers and cooling systems. It also includes heating/cooling for the office, system inefficiencies like transformer, cable and UPS losses and generator parasitic energy draw. Otherwise, the number would have been even lower.

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