HP XC System Software User's Guide Version 3.2

Example 5-18 Environment Variables Available in a Batch Job Script
$ cat ./envscript.sh
#!/bin/sh
name=`hostname`
echo "hostname = $name"
echo "LSB_HOSTS = '$LSB_HOSTS'"
echo "LSB_MCPU_HOSTS = '$LSB_MCPU_HOSTS'"
echo "SLURM_JOBID = $SLURM_JOBID"
echo "SLURM_NPROCS = $SLURM_NPROCS"
$ bsub -n4 -I ./envscript.sh
Job <82> is submitted to default queue <normal>.
<<Waiting for dispatch ...>>
<<Starting on lsfhost.localdomain>>
hostname = n1
LSB_HOSTS = 'n1 n1 n2 n2'
LSB_MCPU_HOSTS = 'n1 2 n2 2'
SLURM_JOBID = 176
SLURM_NPROCS = 4
5.5 Submitting Multiple MPI Jobs Across the Same Set of Nodes
There are two ways to run multiple MPI jobs across the same set of nodes at the same time; they
are:
• Using a script
• Using a Makefile
The following sections show these methods. In both methods, the jobs submitted are parallel
jobs using the HP-MPI message passing interface and use the ping_pong_ring program, which
is delivered with the HP-MPI software.
5.5.1 Using a Script to Submit Multiple Jobs
You can write a script that consists of multiple commands that launch jobs. In this example, the
ping_pong_ring command is run first in the background then again in the foreground:
$ cat script
#!/bin/sh
mpirun -srun -N2 -n4 ./ping_pong_ring 100000 &
mpirun -srun -N2 -n4 ./ping_pong_ring 100000
The following command line executes the script, which submits the jobs:
$ bsub -o %J.out -n2 -ext "SLURM[nodes=2]" ./script
Job <111> is submitted to default queue <normal>.
The bjobs command provides information on the execution of the script:
$ bjobs
JOBID USER STAT QUEUE FROM_HOST EXEC_HOST JOB_NAME SUBMIT_TIME
111 lsfadmi PEND normal lsfhost.loc ./script date and time
Use the squeue command to acquire information on the jobs:
$ squeue -s
STEPID NAME PARTITION USER TIME NODELIST
13.0 hptclsf@111 lsf lsfadmin 0:07 n14
13.1 ping_pong_ring lsf lsfadmin 0:07 n[14-15]
13.2 ping_pong_ring lsf lsfadmin 0:07 n[14-15]
$ bjobs
No unfinished job found
5.5.2 Using a Makefile to Submit Multiple Jobs
You can submit multiple jobs across the same nodes by using a Makefile.
For information on Makefiles and the make utility, see The GNU Make Manual and make(1L).
62 Submitting Jobs