[Beowulf] disabling swap on cluster nodes?
Gavin W. Burris
bug at wharton.upenn.edu
Tue Feb 10 11:36:19 PST 2015
Correction, we only tweak swappiness with a very small swap partition,
leaving overcommit options default.
On 02:05PM Tue 02/10/15 -0500, Gavin W. Burris wrote:
> 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
> Beowulf mailing list, Beowulf at beowulf.org sponsored by Penguin Computing
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Gavin W. Burris
Senior Project Leader for Research Computing
The Wharton School
University of Pennsylvania
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