[Beowulf] disabling swap on cluster nodes?

[Gavin W. Burris]

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.
> 
> Cheers.
> 
> 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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-- 
Gavin W. Burris
Senior Project Leader for Research Computing
The Wharton School
University of Pennsylvania