Data center efficiency metrics have matured over the past few years. These metrics arose with the recognition of the data center as a primary industrial consumer of energy. The data center was once thought of as a controlled environment for data processing equipment. From an energy consumption point of view, it is a factory.
In the United States alone, in 2010 data center energy consumption represented somewhere between 1.5% and 2% of all energy consumed in the country. That is expected to double in just two years’ time. In other regions of the world, data center energy consumption is a major driver of carbon emission control legislation. In other regions still, it is recognized that efficiencies need to be improved in a sense of proper stewardship of natural resources.