On Saturday, July 24, 2010, henry...@dell.com wrote: > Hello, > > > > One of my customer want to set up HPC with thousands of compute nodes. > The parallel file system should have 20GB/s throughput. I am not sure > whether lustre can make it. How many IO nodes needed to achieve this > target? > > > > My assumption is 100 or more IO nodes(rack servers) are needed. >
I'm a bit prejudiced, of course, but with DDN storage that would be quite simple. With the older DDN S2A 9990, you can get 5GB/s per controller-pair , with the newer SFA10000 you can get 6.5 to 7GB/s (we are still tuning it) per controller pair. Each controller pair (couplet in DDN terms) usually has 4 servers connected and fits into single rack in a 300 drive configuration. So you can get 20GB/s with 3 or 4 racks and 12 or 16 OSS servers, which is much below your 100 IO nodes ;) Cheers, Bernd -- Bernd Schubert DataDirect Networks _______________________________________________ Lustre-discuss mailing list Lustre-discuss@lists.lustre.org http://lists.lustre.org/mailman/listinfo/lustre-discuss