The rapid growth in data centers, some with hundreds of thousands of computer servers attending to tasks as diverse as managing complex physics problems and posting pictures to Facebook, has led to a lot of worries about power consumption. A recent census of the industry indicated electricity use will grow by 19 percent just in 2012. That is actually less than people had seen in years past, but indicates no less demand for “clouds” of servers accessible by millions of users. If anything, demand for corporate and private clouds is likely to be even greater. But management of the big centers is getting more efficient, as engineers re-examine every aspect of production, especially power.
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