[torqueusers] Parallel processing for MC code

Jason Bacon jwbacon at tds.net
Thu Nov 17 09:18:18 MST 2011

How many cores does PC1 have? Note that Torque schedules cores, not 
computers, unless you specifically tell it to with resource requirements.



On 11/17/11 04:14, RB. Ezhilalan (Principal Physicist, CUH) wrote:
> Hi All,
> I’ve been trying to set up Torque queuing system on two SUSE10.1 linux 
> PCs (PIII!).
> Installed the linux on both PCs, exported home directory containing 
> BEAMnrc montecarlo code from PC1 to PC2 via NFS and set up SSH 
> password less communication. All seems to be working fine.
> Downloaded latest version of Torque (number not handy) installed 
> PBS ‘nodes’ file was created as per guidelines, PBS_SERVER and QUEUE 
> attributes were set as default.
> Pbsnodes –a command displays- two nodes (PC1 & PC2 and they are free. 
> I am not sure whether this confirms PBS/Torque set up correctly.
> I was able to run an executable BEAMnrc user code in batch mode i.e 
> using ‘exb’ command aliased to ‘qsub’ and sources a built in job 
> script file with option p=1 (single job).
> To split the jobs in to two, so that it runs in parallel on the two 
> PCs, option p=2 should be issued. However, what I noticed was, the job 
> ran twice on the first PC (PC1) but not on both.
> I can’t figure out what went wrong, I suspect PBS setup could have 
> some issues, May be I can try running the job specifically on PC2 if 
> so what command I need to give?
> I would be grateful for any advice!
> Kind Regards,
> Ezhilalan
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Jason W. Bacon
jwbacon at tds.net

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