[inforoots] RE: Network infrastructure [1 of 2]

[John C Green Jr]

At 05:10 AM 3/9/06, David Hunt <dm.hunt at ntlworld.com> wrote:

>  John Green <jcgreen00 at comcast.net> wrote:
>
> > Factoids that might be mentioned at the first generation Google
> > rack.
> >
> > Google has over 500K servers in its search / webserver farms.
> > They dissipate over 100 MwH (100K KwH) of power per year at
> > a cost of over $10M.  It's enough power for 400K average
> > American homes, a city of over 1 million.

You caught me with a thinko.  It's 100,000,000 Kilowatt Hours
at a a dime a piece for $10M.  That number was off by three
orders of magnitude.

>I couldn't reverse engineer your figures;
>
>100,000,000 Wh per year, ok, so divide by 8,760 (hours/year)
>
>= 11,415 Wh then divide this by 500,000 to get the Wh rating per box,
>
>= 11,415 / 500,000 = 0.0228 Wh per box...

100,000,000,000 / 8760 (not 8766 counting leap year) / 500,000

= 22 Watts (not Watt hours) per system which doesn't make sense.

I'll have to go back to the source.  Expect another post next
week.

The number of desktop PCs became obvious to the US Federal
government so they passed EnergyStar legislation.  They're
overdue to notice the server farms and have an EnergyStar
program for servers.

Regards,
John Green