On Mar 8, 2012, at 11:06 AM, Lamar Owen <lo...@pari.edu> wrote: > On Thursday, March 08, 2012 10:52:02 AM Les Mikesell wrote: >> Yes, part of the power savings are deceptive - they only kick in when >> the CPUs are idle and your users would be one of the rare cases that >> peg them for long intervals. I think this is getting better in the >> current generation but haven't followed the latest changes. > > In scientific computing, there is no such thing as 'enough cores' and if 3 48 > core servers physically fit in the space of three older 6 or 8 core servers, > then the users will want to fill that space and get 3 more 48 core servers, > and so your power density has doubled. So the '150%' power increase is (if > I'm reading Mark correctly) per *rack unit* not per core. And, again, in > this space you don't get any savings in power, since this sort of computing > eats cores for breakfast. And virtualization to save power will not address > this type of user's need. > > I live in the same sort of world, just on a smaller scale, and my biggest > power consumer is storage, not compute, but I thoroughly understand Mark's > points.
So, get more power and UPS. The specs are published, so power consumption shouldn't be a "surprise". -Ross _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
