HP XC System Software User's Guide Version 3.2

The srun command is only necessary to launch the job on the allocated node if the HP XC JOB

STARTER script is not configured to run a job on the compute nodes in the lsf partition.

The jobname parameter can be name of an executable or a batch script. If jobname is executable,

job is launched on LSF execution host node. If jobname is batch script (containing srun

commands), job is launched on LSF-HPC node allocation (compute nodes). LSF-HPC node

allocation is created by -n num-procs parameter, which specifies the number of cores the job

requests.

The SLURM srun job launch command is only needed if the LSF-HPC JOB_STARTER script is

not configured for the intended queue, but it can be used regardless of whether or not the script

is configured. You can use the bqueues command to confirm whether or not the JOB_STARTER

script exists; see bqueues(1) for information on the bqueues command.

Example 5-1 invoking the bsub command after which a job can be entered from the standard

input.

Example 5-1 Submitting a Job from the Standard Input

bsub

Example 5-2 shows the submission and launch of a serial interactive job and its output.

Example 5-2 Submitting a Serial Job Using LSF-HPC

$ bsub -I srun hostname

Job <20> is submitted to default queue <normal>.

<<Waiting for dispatch ...>>

<<Starting on lsfhost.localdomain>>

Example 5-3 shows the submission of an interactive serial job without the SLURM srun command

and the job output.

Example 5-3 Submitting an Interactive Serial Job Using LSF-HPC only

$ bsub -I hostname

Job <73> is submitted to default queue <normal>.

<<Waiting for dispatch ...>>

<<Starting on lsfhost.localdomain>>

Example 5-4 uses the LSF-SLURM External Scheduler to submit a job to run on four cores on

two specific compute nodes.

Example 5-4 Submitting an Interactive Serial Job Using LSF-HPC and the LSF-SLURM External

Scheduler

$ bsub -I -n4 -ext "SLURM[nodelist=n[14,16]]" srun hostname

Job <9> is submitted to default queue <normal>.

<<Waiting for dispatch ...>>

<<Starting on lsfhost.localdomain>>

n14

n16

5.2.2 Submitting a Serial Job Through SLURM Only

This section describes how to build a simple hello world application, called hw_hostname,

execute it on the login node, and launch it with the SLURM srun command.

54 Submitting Jobs