[Beowulf] choosing a high-speed interconnect

Robert G. Brown rgb at phy.duke.edu
Tue Oct 12 19:38:51 EDT 2004


On Tue, 12 Oct 2004, Robert G. Brown wrote:

> you're already using gigE.  gigE's latency isn't great, but its
> bandwidth should be at least comparable (within a factor of 1-3) of the
> faster networks.

Correction (as Greg pointed out offline, very kindly):

My gross generalization is grossly incorrect -- you CAN get nearly an
order of magnitude improvement in bandwidth with Quadrics and IB.

I stand humbly corrected.

But you still should verify that bandwidth is your problem before
investing in more of it.

   rgb

Robert G. Brown	                       http://www.phy.duke.edu/~rgb/
Duke University Dept. of Physics, Box 90305
Durham, N.C. 27708-0305
Phone: 1-919-660-2567  Fax: 919-660-2525     email:rgb at phy.duke.edu


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