From: Axel Kohlmeyer (akohlmey_at_gmail.com)
Date: Tue Jun 14 2011 - 13:25:23 CDT
>> Does the simulation you are running scale better with an InfiniBand
> I'm afraid that that is something we can't afford.
hmm... i wouldn't say that. you have to be a bit more creative. ;)
for example, you can set up a small 3 node cluster
without(!) an expensive switch by simply buying 3 dual
port IB cards and 3 cables. OpenSM comes with the OS
and you are in business for less than $2000. if you use
3 4-way 8-core opteron 61xx nodes with 32GB RAM with
them, you can have a kickass 100 core machine for way
under $20k (if you buy from a vendor that doesn't screw you).
that is hard to beat, even with GPUs. ;)
...and the NAMD ibverbs version runs really well
on these machines. we have a bunch of those
(more expensive ones with 12-core cpus) here
and i am very happy with them.
-- Dr. Axel Kohlmeyer akohlmey_at_gmail.com http://goo.gl/1wk0 Institute for Computational Molecular Science Temple University, Philadelphia PA, USA.
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