[Beowulf] size of swap partition
gerry.creager at tamu.edu
Mon Jun 9 15:51:34 PDT 2008
We have the potential to have to swap whole jobs out of memory on a
complete node. As a result, I recommend 1.5-2.0 times memory in swap if
this is a consideration. I do know there's likely to be a bit of
discussion as this varies widely from site to site and based on
Mikhail Kuzminsky wrote:
> A lot of time ago it was formulated simple rule for swap partition size
> (equal to main memory size).
> Currently we all have relative large RAM on the nodes (typically, I
> beleive, it is 2 or more GB per core; we have 16 GB per dual-socket
> quad-core Opteron node). What is typical modern swap size today?
> I understand that it depends from applications ;-) We, in particular,
> practically don't have jobs which run "out-of-RAM". For single core
> dual-socket Opteron nodes w/4GB RAM per node and "molecular modelling
> workload" we used 4 GB swap partition.
> But what are the reccomendations of modern praxis ?
> Mikhail Kuzminksy
> Computer Assistance to Chemical Research Center
> Zelinsky Inst. of Organic Chemistry
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Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University
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