[Beowulf] Multirail Clusters: need comments
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Greg Lindahl lindahl at pathscale.comWed Dec 14 11:23:13 PST 2005
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On Tue, Nov 29, 2005 at 09:38:15PM +0800, Greg Anderson wrote: > I would like to know the views of the cluster gurus on multi-rail clusters, > esp, quad rail networks. Are quad rail networks practical to implement ( say > InfiniBand, Quadrics, Myrinet, (GE, maybe not?)). The one thing you can be sure of is that different interconnects have different issues dealing with multi-rail. Even if the microbenchmarks show an improvement, real apps often do not. > - Are there any quad rail HPC clusters? (me and google couldn't find any) Linux Networx has announced a 4-socket/2-rail and 8-socket/4-rail InfiniPath system, the LS/X. Our experience on the 2-rail system is that it scales quite well. We don't have that much experience with the 4-rail systems yet. Our approach to multi-rail is bind cpus to a particular adaptor chip. -- greg
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