[Beowulf] disabling swap on cluster nodes?

Gavin W. Burris bug at wharton.upenn.edu
Tue Feb 10 11:05:59 PST 2015

We don't disable swap, ala the voodoo mentioned in the Linux Journal
article.  We only create a one gig swap, setting vm.swappiness=1 and
vm.overcommit_memory=2 to stay out of it.  No problems, but I wonder if
we should just skip a swap partition, all together.


On 05:35PM Fri 02/06/15 -0500, Prentice Bisbal wrote:
> Do any of you disable swap on your compute nodes?
> I brought this up in a presentation I gave last night on HPC system
> administration, but realized I never actually did this, or know of anyone
> who has. I would tweak the vm.overcommit_memory setting, but that's not the
> same as disabling swap altogether. I'd like to try doing this in the future,
> but I prefer to learn from someone else's mistakes first.
> -- 
> Prentice
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Gavin W. Burris
Senior Project Leader for Research Computing
The Wharton School
University of Pennsylvania

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