[Beowulf] disabling swap on cluster nodes?

Chris Samuel samuel at unimelb.edu.au
Fri Feb 6 17:22:53 PST 2015

On Fri, 6 Feb 2015 05:35:43 PM Prentice Bisbal wrote:

> Do any of you disable swap on your compute nodes?

We run diskless clusters these days and so we don't get a choice. :-)

Seems to be fine - we use Slurm's cgroups support to constrain memory usage and 
don't overcommit memory.

Java's been the only issue (defaulting to trying to allocate 1/4 the RAM of 
the node on startup) but Java 8 finally fixes that problem and so it'll now 
start in our default allocation of 2GB per core without any extra command line 

All the best,
 Christopher Samuel        Senior Systems Administrator
 VLSCI - Victorian Life Sciences Computation Initiative
 Email: samuel at unimelb.edu.au Phone: +61 (0)3 903 55545
 http://www.vlsci.org.au/      http://twitter.com/vlsci

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