[Beowulf] RE: Capitalization Rates - How often should you replace a cluster? (resent - 1st sending wasn't posted ).
hahn at mcmaster.ca
Wed Jan 21 08:04:45 PST 2009
> Without going into a big research project.. Here in Southern California,
> rents are about $1/sq ft/month for cheap industrial space. Electricity is
> about $0.20/kWh (maybe for a big bulk consumer, it gets down to the
> $0.10/kWh range)
hmm. "wholesale" power here is $Cdn .05/kWh - on home bills it gets padded
out to about $.10 by "delivery" and "debt retirement" surcharges.
> Figure a node draws 400w, and you can stack 20 nodes in a rack, which
hmm. I find 1U typicalfor clusters, and see 350W as typical.
> occupies 10 square feet (need to have room to stand in front of the rack,
I'd probably go 3 tiles/rack - mainly for airflow.
> The rent is tiny compared to utilities. $2K/node seems plausible (3*
hmm, another difference is that I'd expect to pay ~$5k for an HPC node.
thanks, mark hahn.
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