Cisco switches for lam mpi
jd89313 at hotmail.com
Tue Jul 29 12:37:37 EDT 2003
I wonder if someone can help me
We have just installed a 32 Node Dual Xeon Cluster, with a Cisco Cataslyst
4003 Chassis with 48 1000Base-t ports.
We are running LAM MPI over gigabit, but we seem to be experiencing
bottlenecks within the switch
Typically, using the cisco, we only see CPU utilisation of around 30-40%
Howver, we experimented with a Foundry Switch, and were seeing cpu
utilisation on the same job of around 80 - 90%.
We know that there are commands to "open" the cisco, but the ones we have
been advised dont seem to do the trick.
Was the cisco a bad idea? If so can someone recommend a good Gigabit switch
for MPI? I have heard HP Procurves are supposed to be pretty good.
Or does anyone know any other commands that will open the Cisco switch
further getting the performance up
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