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Re: Google's PUE
Patrick W. Gilmore wrote:
On Oct 1, 2008, at 2:04 PM, Martin Hannigan wrote:
Not talking down this PR release....
Without comparing locations, sizes of floor plates, etc. I am sure Google has more than A-F, so one has to wonder which data centers they left off the map.
I think I can submit without proof that a PUE of 1.2 is far more impressive in New Mexico or Arizona than it is in Vancouver, BC since you are essentially measuring the energy to keep the datacenter at temperature throughout seasonal (or external) ambient heat deltas.
Likewise, a 10,000 sq ft single customer DC is far less impressive than a 200,000 sq ft general purpose (colo) DC. (they say large scale -- is that number of cores, or sq ft?, but I don't have a number for that).
And to address Patrick's rhetorical question - if it costs you $400MM (like a datacenter proposed underground in Japan) to save $15MM / yr in energy costs, one could easily argue that the environment "savings" is not sufficient to overcome the upfront investment. If you spent $40MM in trees (instead of $400MM on an investment to save $15MM/yr), you could argue the environment would be far better off.