Hi,
Am 04.11.2008 um 16:54 schrieb Sangamesh B:
Hi all,
In Rocks-5.0 cluster, OpenMPI-1.2.6 comes by default. I guess it
gets installed through rpm.
# /opt/openmpi/bin/ompi_info | grep gridengine
MCA ras: gridengine (MCA v1.0, API v1.3, Component
v1.2.6)
MCA pls: gridengine (MCA v1.0, API v1.3, Component
v1.2.6)
Now I've to install OpenMPI-1.2.7. The "./configure --help | grep
gridengine" - doesn't show anything.
In such scenario how OpenMPI-1.2.7 can be integrated to SGE?
only for 1.3 it must be compiled with --with-sge, not in 1.2.x
After achieving this integration:
1. Is it possible to use -machinefile option in the SGE script?
Eg:
#$ -pe orte 4
/opt/openmpi/bin/mpirun -machinefile $TMPDIR/machines -np
4 <executable>
You don't need this. Open MPI with use the correct cores on its own.
Just specify: mpirun -np $NSLOTS mypgm
2. If "qstat -f" is showing 2 slots on node1 and 2 slots on node2
for a 4 process openmpi job, then will these processes run exactly on
those nodes?
qstat is only an output of what is granted to the job. With a bad
configuration you could start all forks on the master node of the
parallel job and leave the slaves idling. Open MPI will do the right
thing on its own.
-- Reuti
# qconf -sp orte
pe_name orte
slots 999
user_lists NONE
xuser_lists NONE
start_proc_args /bin/true
stop_proc_args /bin/true
allocation_rule $fill_up
control_slaves TRUE
job_is_first_task FALSE
urgency_slots min
Thank you,
Sangamesh
Consultant - HPC
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