[torqueusers] forcing use of one processor per node?

John Young j.e.young at larc.nasa.gov
Wed Apr 16 09:10:58 MDT 2008

I have a small cluster of dual processor machines.  Normally,
I would like to keep each processor busy, but sometimes (due
usually to memory constraints) I would like to force a job
that I want to run, say, on 4 processors to run on 4 separate 
nodes each using only one processor, rather than on two nodes
using both processors.

I have tried using things like

#PBS -l nodes=4:ppn=1

and even 


but it does not seem to matter.  I always end up using both
processors on two nodes.  'qstat -a' says that the job is
using 4 nodes, but it doesn't really...  :-(

Any ideas?

John E. Young				NASA LaRC B1148/R226
Analytical Services and Materials, Inc.       (757) 864-8659
'All ideas and opinions expressed in this communication are
those of the author alone and do not necessarily reflect the
ideas and opinions of anyone else.'

More information about the torqueusers mailing list