This weekend's NYT carried an alarming feature article on the gross wastefulness of the data-centers that host the world's racks of server hardware. James Glanz's feature, The Cloud Factory, painted a picture of grotesque waste and depraved indifference to the monetary and environmental costs of the "cloud," and suggested that the "dirty secret" was that there were better ways of doing things that the industry was indifferent to.
In a long rebuttal, Diego Doval, a computer scientist who previously served as CTO for Ning, Inc, takes apart the claims made in the Times piece, showing that they were unsubstantiated, out-of-date, unscientific, misleading, and pretty much wrong from top to bottom.
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First off, an “average,” as any statistician will tell you, is a fairly meaningless number if you don’t include other values of the population (starting with the standard deviation). Not to mention that this kind of “explosive” claim should be backed up with a description of how the study was made. The only thing mentioned about the methodology is that they “sampled about 20,000 servers in about 70 large data centers spanning the commercial gamut: drug companies, military contractors, banks, media companies and government agencies.” Here’s the thing: Google alone has more than a million servers. Facebook, too, probably. Amazon, as well. They all do wildly different things with their servers, so extrapolating from “drug companies, military contractors, banks, media companies, and government agencies” to Google, or Facebook, or Amazon, is just not possible on the basis of just 20,000 servers on 70 data centers.