[Bioclusters] Opterons and Linux

[elijah wright]

> > Second, regrading power and heat, what steps have you taken to remedy
> > the heat generated by the Opterons and what kind of electrical
> > upgrades have you done? We have a VA Linux rack with about 20U's left
> > which will house the Opterons. It has 2 220 volt power rails (we only
> > use one) that delivers power to a 4U APC (I forget the model number)
> > unit, a 4U quad Xeon server, 2 switches and a 4U RAID array.
>
> Assume about 200-250 W under full load per unit.  Quads might consume
> about 500 W.

that rack will definitely need bigger/more UPSen in it.  we never run ours
at more than ~50% (or 33% if we can get away with it...) capacity - a nice
fat server can take a stout 4U ups to ~25%.

elijah