>----- Original Message ----- >From: "Rahul Nabar" <rpna...@gmail.com> >To: "Jan Heichler" <jan.heich...@gmx.net> >Cc: "Beowulf Mailing List" <beowulf@beowulf.org>, "Mark Hahn" ><h...@mcmaster.ca> >Sent: Wednesday, May 13, 2009 10:21:06 AM GMT -06:00 US/Canada Central >Subject: Re: Re[2]: [Beowulf] recommendations for cluster upgrades > >On Wed, May 13, 2009 at 1:55 AM, Jan Heichler <jan.heich...@gmx.net> wrote: >> I'm really surprised that everyone just screams "Nehalem" - of course the >> platorm is the fastest that you can buy for money at the moment. It is the >> youngest design so that is not suprising. >> >> But clustering is always about price/performance. And AMD doesn't look so >> bad there. > >Absolutely. The price/performance ratio is what I'm really interested in.
Of course, neither the numerator or denominator here are atomic. In particular, performance must refer to sustained performance on your application(s). I would expect bandwidth intensive applications to show enough of an advantage on Nehalem to compensate for the difference in processor price; on the other hand if you are planning a socket-only upgrade, the result might be different. This is an occasion to break out Excel, and crunch your numbers. In addition, I would consider the average processor count of the your work load. If it typically does not exceed your current system size, running two clusters with different architectures as a throughput engine might make sense. Regards, rbw _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
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