[Beowulf] using two separate networks for different data streams

Greg Lindahl lindahl at pathscale.com
Mon Jan 30 00:18:11 EST 2006


On Fri, Jan 27, 2006 at 04:28:54PM -0800, Dan Stromberg wrote:

> Is there a way of characterizing in what proportion a given application
> relies on OpenMP, and how much the application depends on MPI (and hence
> MPI network latency) - other than speaking with application developers
> to get their intuitive feel, that is?  :)

If you don't want to spend an unfortunate amount of time learning
tools (alas, I wish they were easier to use), your best bet is to run
on gigE and on some better cluster interconnect and see how it turns
out.

PathScale has 2 16-node clusters we provide remote access to for such
testing.

-- greg

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