HP XC System 4.x Software Submitting a Serial Job Through Slurm Only, $ bsub -I srun hostname

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 node allocation (compute nodes). LSF node allocation is created by -nnum-procsparameter, which specifies the number of cores the job requests.

The SLURM srun job launch command is only needed if the LSF 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 5-1invoking 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 5-2shows the submission and launch of a serial interactive job and its output.

Example 5-2 Submitting a Serial Job Using LSF

$ bsub -I srun hostname

Job <20> is submitted to default queue <normal>. <<Waiting for dispatch ...>>

<<Starting on lsfhost.localdomain>> n1

Example 5-3shows 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 only

$ bsub -I hostname

Job <73> is submitted to default queue <normal>. <<Waiting for dispatch ...>>

<<Starting on lsfhost.localdomain>> n1

Example 5-4uses 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 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

n14

n16

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.

The following is the C source code for this program; the file name is hw_hostname.c.

50 Submitting Jobs