[Beowulf] Gigabit switch recommendations
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Bruce Allen ballen at gravity.phys.uwm.eduWed Mar 29 23:05:49 PST 2006
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> On Tue, Mar 28, 2006 at 10:01:03PM -0600, Bruce Allen wrote: >> After discussions with some of their technical people, the conclusion was >> that the switch had enough buffer memory to run wire speed with MTU=1500 >> but not with MTU=9000. >> >> Our testing results are here: >> http://www.lsc-group.phys.uwm.edu/~parmor/Network-performance/netperf.html > > But according to that graph, the Dell 2716 switch gave performance > substantially below wire speed for ALL MTU sizes, including 1500. So > what's up with Dell's "wire speed but only at MTU=1500" story? You'll have to ask Dell! I agree that their explanation does not make sense, for exactly the reason that you gave. We didn't see wire speed performance even at MTU=1500. Cheers, Bruce
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