[Beowulf] Re: building a new cluster
Glen.Gardner at verizon.net
Sat Sep 4 10:11:25 PDT 2004
I am not familiar with infiniband, but if you have a switch with both
infiniband and ethernet, I suspect you can probably do okay with it. You
just have to realize that the 100 MBit network is not as fat a paipe as
infiniband. So when the infiniband network wants to talk to the
ethernet, that transaction is going to be slow.
Recently I needed to connect a couple of gigabit ethernet macines to
multiple fast ethernet machines, and ended up building a concentrator
out of cheap gigabit switches so that the gigabit bandwidth was more or
less usable. I picked up a little latency, but it was still an
improvement over plugging the gigabit nodes straight into a fast
Michael Lodico K1EG wrote:
>That might be a solution. But we also want to chain our current old
>cluster (based on 100 Mbps ethernet switch) into the new cluster. Will
>that be a problem (Infiniband + Ethernet)?
>I would think that combining the two you are going to limit the system
>to 100 Mbps plus you could start getting data clashes from the faster IB
>which could slow down the network even more.
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Glen E. Gardner, Jr.
AMSAT MEMBER 10593
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