Administering Platform LSF - SAS

Submitting MPI Jobs
Submitting MPI Jobs
mpijob script
mpijob syntax
Example
The Message Passing Interface (MPI) is a portable library that supports parallel
programming. LSF supports MPICH, a joint implementation of MPI by Argonne
National Laboratory and Mississippi State University. This version supports
both TCP/IP and IBM’s Message Passing Library (MPL) communication
protocols.
LSF provides an mpijob shell script that you can use to submit MPI jobs to LSF.
The mpijob script writes the hosts allocated to the job by LSF to a file and
supplies the file as an option to MPICH’s mpirun command.
mpijob -tcp mpirun program arguments
Write the LSF hosts to a PROCGROUP file, supply the -p4pg procgroup_file
option to the mpirun command, and use the TCP/IP protocol. This is the
default.
mpijob -mpl mpirun program arguments
Write the LSF hosts to a MACHINE file, supply the
-machinefile machine_file option to the mpirun command, and use the
MPL on an SP-2 system.
◆ program—The parallel executable to be run
◆ arguments—Any arguments required by the parallel executable
To submit a job requesting four hosts and using the default TCP/IP protocol,
use:
% bsub -n 4 mpijob mpirun myjob
Submitting jobs to a pool of IBM SP-2 nodes
Before you can submit a job to a particular pool of IBM SP-2 nodes, an LSF
administrator must install the SP-2 ELIM. The SP-2 ELIM provides the pool
number and lock status of each node.
To submit the same job to run on four nodes in pool 1 on an IBM SP-2 system
using MPL, use:
% bsub -n 4 -R "pool == 1" mpijob -mpl mpirun myjob
To submit the same job to run on four nodes in pool 1 that are not locked
(dedicated to using the High Performance Switch) on an SP-2 system using
MPL, use:
% bsub -n 4 -q mpiq -R "pool == 1 && lock == 0" mpijob -mpl mpirun myjob
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Administering Platform LSF