While lowering the Power Usage Effectiveness (PUE) rating of a data center does lower its overall energy consumption and therefore the energy bill, a facility with a PUE of 1 (the current Holy Grail of facility efficiency) can rarely be seen. But some data center vendors like Google are showing ongoing improvement in PUE (aided by efficient UPS).
Also, the internet auction site eBay is able to announce a success in this matter. It used guidelines set by nonprofit environmental IT consortium Green Grid to help build a modular data center with a power usage effectiveness ratio of 1.35.
These strategies have yielded unusual efficiency. The data center in Phoenix, Arizona, recorded the PUE ratio – a measurement trademarked by the Green Grid – over the course of one week in January 2012. The center has a best-case PUE as low as 1.26 for measurements taken in that month, according to a case study released by the Green Grid.
What does this mean in practice? PUE is an energy efficiency metric that compares a facility’s total power usage to the amount of power used by the IT equipment, revealing how much is lost in distribution and conversion.
That means that at peak efficiency, the IT equipment in eBay’s containers was using more than 98 percent of the available power, an accomplishment which appears to have no precedent.
If you are intereted in further details we recommend the case study after the following link: