[Pw_forum] How to choose number of pools
akohlmey at cmm.chem.upenn.edu
Thu Apr 30 17:23:09 CEST 2009
On Thu, 2009-04-30 at 17:09 +0200, Lorenzo Paulatto wrote:
> In data 30 aprile 2009 alle ore 16:57:46, Ihsan Erikat <ihsanas at yahoo.com>
> ha scritto:
> > Thank you, the CPU are mpd connection
mpd are the processes that MPICH-2 generates upon
initializing the parallel environment.
that doesn't really help much, but it is likely
that the cluster is running with GigE at best.
> I don't know what it is, if it's not faster that a 10/100/1000 ethernet
> card your best bet is to use 8 processors and 8 pools, leaving 2
> processors idle. Also, make sure that your outdir is set to some directory
better yet. run with -np 8 and put a second job on the other two. ;-)
> local to the nodes, e.g. /tmp, otherwise the overhead introduced when
> saving the restart data may kill the performance.
> best regards
Axel Kohlmeyer akohlmey at cmm.chem.upenn.edu http://www.cmm.upenn.edu
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