Electricity usage costs have become an increasing fraction of the total cost of ownership
(TCO) for data centers. It is possible to dramatically reduce the electrical consumption of
typical data centers through appropriate design of the network-critical physical
infrastructure and through the design of the IT architecture. This paper explains how to
quantify the electricity savings and provides examples of methods that can greatly reduce
electrical power consumption.
Conventional models for estimating electrical efficiency of data centers are grossly inaccurate for real-world installations.
Estimates of electrical losses are typically made by summing the inefficiencies of various electrical devices, such as power and cooling equipment.
This paper show that the values commonly used for estimating equipment inefficiency are quite inaccuate. A simple,
more accurate efficiency model is described that provides a rational basis to identify and quantify waste in power and cooling equipment.
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