[Beowulf] Gigabit switch recommendations

Andrew Piskorski atp at piskorski.com
Wed Mar 29 21:18:38 PST 2006

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?

Andrew Piskorski <atp at piskorski.com>

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