On 11/27/2012 03:37 PM, Douglas Eadline wrote: > >> My interest in Arm has been the flip side of balancing flops to network >> bandwidth. A standard dual socket (AMD or Intel) can trivially saturate >> GigE. One option for improving the flops/network balance is to add >> network bandwidth with Infiniband. Another is a slower, cheaper, cooler >> CPU and GigE. >> > applause.
I applaud that applause. What Bill has just described is known as an "Amdahl-balanced system", and is the design philosophy between the IBM Blue Genes and also SiCortex. In my opinion, this is the future of HPC. Use lower power, slower processors, and then try to improve network performance to reduce the cost of scaling out. Essentially, you want the processors to be *just* fast enough to keep ahead of the networking and memory, but no faster to optimize energy savings. The Blue Genes do this incredibly well, so did SiCortex, and Seamicro appears to be doing this really well, too, based on all the press they've been getting. With the DARPA Exascale report saying we can't get to Exascale with current power consumption profiles, you can bet this will be a hot area of research over the next few years. Okay. I'm done listening to myself type. Prentice _______________________________________________ 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
