On Thu, Apr 08, 2010 at 04:13:21PM +0000, richard.wa...@comcast.net wrote: > > What are the approaches and experiences of people interconnecting > clusters of more than128 compute nodes with QDR InfiniBand technology? > Are people directly connecting to chassis-sized switches? Using multi-tiered > approaches which combine 36-port leaf switches?
I would expect everyone to use a chassis at that size, because it's cheaper than having more cables. That was true on day 1 with IB, the only question is "are the switch vendors charging too high of a price for big switches?" > I am looking for some real world feedback before making a decision on > architecture and vendor. Hopefully you're planning on benchmarking your own app -- both the HCAs and the switch silicon have considerably different application- dependent performance characteristics between QLogic and Mellanox silicon. -- greg _______________________________________________ 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
