Re: [Beowulf] One network, or two?

[Joshua Baker-LePain]

On Tue, 23 Sep 2008 at 1:20pm, Greg Lindahl wrote

On Tue, Sep 23, 2008 at 03:21:55PM -0400, Joshua Baker-LePain wrote:

In theory, it's a great idea.  In practice, wiring up an entire 2nd
network gets to be a major PITA (as well as being uncheap) as your
cluster size increases.  I've got ~350 nodes here, and a 2nd set of
cabling is really, really low on the list of projects I'd like to tackle.

I can name a bunch of 350 node clusters that have multiple networks.
So, obviously, YMMV.

Those are probably at schools which actually *have* undergrads.  *sigh*  I 
need flunkies...

In all seriousness, if management and/or file traffic were slowing down 
*work*, then I'd absolutely go for a 2nd network.  But ours is a mixed use 
cluster running primarily EP serial jobs.  As you said, mileage varies.

--
Joshua Baker-LePain
QB3 Shared Cluster Sysadmin
UCSF
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