On Fri, 21 Mar 2008 17:41:28 -0400 "Sacerdoti, Federico" <federico.sacerd...@deshaw.com> wrote:
> Ralph, we wrote a launcher for mvapich that uses srun to launch but > keeps tight control of where processes are started. The way we did it > was to force srun to launch a single process on a particular node. > > The launcher calls many of these: > srun --jobid $JOBID -N 1 -n 1 -w host005 CMD ARGS My work-around will be an mpirun which looks something like this: #!/bin/bash hostfile=`mktemp` || exit 1 srun /bin/hostname | sort | uniq -c | sed -e 's/ *\([0-9]\+\) \+\(.\+\)/\2 slots=\1/' > $hostfile /usr/bin/mpirun.openmpi-1.2.4 --hostfile $hostfile $@ rm $hostfile i.e. we are collecting all nodes with "srun /bin/hostname", sort and count them and bring them into the format of a hostfile: node001 slots=4 node002 slots=2 ... But that's definitely not the API to slurm, Ralph was talking about :-) Werner
