HP XC System Software User's Guide Version 3.2

Example 5-13 Using the External Scheduler to Constrain Launching to Nodes with a Given Feature

$ bsub -n 10 -ext "SLURM[constraint=dualcore]" -I srun hostname

You can use the bqueues command to determine the SLURM scheduler options that apply to

jobs submitted to a specific LSF-HPC queue, for example:

$ bqueues -l dualcore | grep SLURM

MANDATORY_EXTSCHED: SLURM[constraint=dualcore]

5.4 Submitting a Batch Job or Job Script

Use the following bsub command format to submit a batch job or job script:

bsub -n num-procs [bsub-options] script-name

The -n num-procs parameter, which is required for parallel jobs, specifies the number of cores

the job requests.

The script-name argument is the name of the batch job or script. The script can contain one

or more srun or mpirun commands.

The script will execute once on the first allocated node, and the srun or mpirun commands

within the script will be run on the allocated compute nodes.

In Example 5-14, a simple script named myscript.sh, which contains two srun commands,

is displayed then submitted.

Example 5-14 Submitting a Job Script

$ cat myscript.sh

#!/bin/sh

srun hostname mpirun -srun hellompi

$ bsub -I -n4 myscript.sh

Job <29> is submitted to default queue <normal>.

<<Waiting for dispatch ...>>

<<Starting on lsfhost.localdomain>>

Hello world! I'm 0 of 4 on n2

Hello world! I'm 1 of 4 on n2

Hello world! I'm 2 of 4 on n4

Hello world! I'm 3 of 4 on n4

Example 5-15 runs the same script but uses the LSF-SLURM External Scheduler option to specify

different resources (here, 4 compute nodes).

60 Submitting Jobs