[Beowulf] size of swap partition

Gerry Creager gerry.creager at tamu.edu
Mon Jun 9 18:51:34 EDT 2008


Misha,

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 
requirements.

gerry

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
> Moscow   _______________________________________________
> Beowulf mailing list, Beowulf at beowulf.org
> To change your subscription (digest mode or unsubscribe) visit 
> http://www.beowulf.org/mailman/listinfo/beowulf

-- 
Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.862.3982 FAX: 979.862.3983
Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843

_______________________________________________
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf

-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.



More information about the Beowulf mailing list