Last week Google disclosed the details of its energy consumption, and its data center engineers argued that the leading figure cited to assess how energy-efficient a data center is, power usage effectiveness (PUE), must be continuously measured and averaged over a twelve-month period. According to Adam Lesser, GigaOM Pro Green IT analyst, in his weekly column (subscription required), this was a veiled shot at some companies that measure their data centers on a cold day in January when their cooling costs are zero and then publish a great PUE number. And Google is right, says Lesser: we need more transparency surrounding PUE.
In Adam’s column he also suggests three shifts in focus with regard to data efficiency that will matter in the future:
- 1. Admit the limits of the Power Usage Effectiveness metric.
- 2. Think about software.
- 3. Integrate hardware and software efficiency metrics.
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