Re: Google's PUE

From: Jean-François Mezei (no email)
Date: Wed Oct 01 2008 - 18:11:03 EDT

  • Next message: Alex Rubenstein: "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 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.

    In the case of Google, the amount of data they spit out to the internet
    would be a good metric of how much work is being done. So how much power
    is consumed per gigabyte of data spitted out to the internet would be a
    good metric of how efficient the data centre is. But for a bank, this
    would not be a good metric since a lot fo the work doesn't involve
    sending much data in/out. (because much of the work of a transaction
    involves a lot of validation/logging)

    To me, it seems that PUE is just a metric of how efficient the air
    conditioning is. Not really how energy efficient the whole data centre
    is for how much work it does.


  • Next message: Alex Rubenstein: "RE: Google's PUE"





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