>
>
> On Jan 10, 4:04 am, William Stein <wst...@gmail.com> wrote:
>> On Mon, Jan 9, 2012 at 7:12 PM, Dr. David Kirkby
>>
>> <david.kir...@onetel.net> wrote:
>> > I'm not sure if this idea will go down well, but I'll mute it anyway.
>>
>> > I know William has switched off machines (t2.math for example), as he does
>> > not have the power/cooling for them. That seems a real shame for that
>> > machine to sit and collect dust, when it could be used.
>>
>> I have the power now. The only machine that is off is t2.math. No
>> other machine is off. That was a temporary measure in light of a
>> *major* electrical issue that arose in the UW math server room, which
>> was beyond my control. If anybody will volunteer to maintain
>> t2.math at a software level, I'm happy to turn it on and give that
>> person root.
>
> I'll do my best in the limited time I have available if you switch it
> back on.
>
>> > So would William consider paying the electric costs for those that make
>> > servers available, and are not covered by their institution? Would it be a
>> > waste of money, or good use of money?
>
>> How much exactly would the electrical costs be?
>
> I have two decent servers decent (both IBM) but want to move CPU from
> the 1U unit to the 2U unit, as the 1U unit has faster processors. But
> I've had to order the necessary heatsink and VRM to make the change. I
> will have a machine with a pair of quad core 3.16 GHz Xeons (8 cores
> in total) and a significant amount of RAM - perhaps as much as 48 GB.
>
> Once I get set up, I'll measure the power consumption. Obviously it's
> impossible to give an exact figure for electric costs.
>
> But I was more thinking of the general principle that if you want more
> buildbots, then at the end of the day someone has to pay for them.
> Electricity cost is a significant cost of the ownership of servers.
I think the electrical bill for the house I own is about $20/month
total. Thus I view electricity as being fairly cheap, at least,
compared to water and gas. I don't know what your rates are where
you live, etc., but I might be surprised if running a few computers
costs substantially more than my entire house.
-- William
--
William Stein
Professor of Mathematics
University of Washington
http://wstein.org
--
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