North American Network Operators Group|
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RE: Google's PUE
> Google not counting electricity losses from power cords etc gives the > image that it doesn't really want to account everything and want to > skew the numbers as much as possible. I don't agree with this. It is commonly accepted that when computing DCIE/PUE, the point of "demarcation" (used that term for the telco crowd) is the receptacle. If they did not include losses in transformation, UPS, distribution, etc., then I would agree. But they seem clear about that in the discussion. > I would be far more interested in a metric that shows the amount of > power used for each MIPS of CPU power (or whatever CPU horsepower > metric other than clock speed). And also amount of power used for each gbps of > telecom capacity USED. > > Another metric would be how much power is used to store how many > terabytes of data on disk. Disks consume much power too. I think you mean "energy", not telecom. While what you ask for is very important, that is generally a function of efficiency of a piece of equipment closed to the consumer. In other words, how efficient a Dell is vs. a HP or something. These things do not relate to the definition of PUE/DCIE. > To me, it seems that PUE is just a metric of how efficient the air > conditioning is. This is the point. It's a metric of the FACILITY, not the COMPUTATION.