Multiple node groups in Scyld
rjones at merl.com
Wed Jun 13 07:04:25 PDT 2001
Karl Kosack <kosack at hbar.wustl.edu> writes:
> I know in other MPI implementations, it is possible to create a
> file of machine names which specifies which nodes to use for a particular
> job, but I can't seem to find that capability in the Scyld distribution.
> I imagine there must be a simple way to do this, since a large cluster
> wouldn't be very useful without it. Can anyone help me?
In /usr/mpi-beowulf/bin there's a version of mpirun from the MPICH
implementation. It takes a -machinefile argument. However, I'm not
sure how well supported and integrated this version of mpirun is. At
least some parts (e.g., -nolocal) don't work.
The issue of running jobs on specific nodes has come up several
times. It should probably be made a FAQ in the Scyld documentation.
It would be nice to see an answer from someone at Scyld, either in the
form "<foo> is the supported way to run jobs on specific nodes" or
"we're working on a solution for the next release."
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