Beowulfs can compete with Supercomputers [was Beowulf: A theo rical approach]
billran at reciprocal.com
Fri Jun 23 14:09:15 PDT 2000
> Many supercomputer sites use IBM SP machines, which are
> clusters, so there
> isn't that much to prove.
One question: from what I remember the nodes within an SP
are moderate sized SMP in their own right. Mixed mode programming
(threads within a node, MPI between nodes) was becoming popular
as a way of increasing scalability (or rather avoiding the
imediate penalties). I seem to remember Pete Beckman and Co. talking
about this at the SIAM PP/GS conference a couple years back.
Have you guys had any experience with comparing the performance of
similar codes on an SP versus a fully distributed cluster with similar
performance and number of processors?
Also, speaking of weather prediction, des anyone know of any recent
advances in getting the shallow-water model to perform well on
a cluster? I was always under the impression that this was a big
sticking point for some of the more complex models.
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