HP XC System 4.x Software manual $ bsub -n 10 -ext SLURMnodelist=n1-10 srun hostname

Example 5-9 Using the External Scheduler to Submit a Job to Run on Specific Nodes

$ bsub -n4 -ext "SLURM[nodelist=n6,n8]" -I srun hostname Job <70> is submitted to default queue <normal>. <<Waiting for dispatch ...>>

<<Starting on lsfhost.localdomain>> n6

n6

n8

n8

In the previous example, the job output shows that the job was launched from the LSF execution host lsfhost.localdomain, and it ran on four cores on the specified nodes, n6 and n8.

Example 5-10shows one way to submit a parallel job to run one task per node.

Example 5-10 Using the External Scheduler to Submit a Job to Run One Task per Node

$ bsub -n4 -ext "SLURM[nodes=4]" -I srun hostname Job <71> is submitted to default queue <normal>. <<Waiting for dispatch ...>>

<<Starting on lsfhost.localdomain>> n1

n2

n3

n4

In the previous example, the job output shows that the job was launched from the LSF execution host lsfhost.localdomain, and it ran on four cores on four different nodes (one task per node).

Example 5-11shows one way to submit a parallel job to avoid running on a particular node.

Example 5-11 Using the External Scheduler to Submit a Job That Excludes One or More Nodes

$ bsub -n4 -ext "SLURM[nodes=4; exclude=n3]" -I srun hostname Job <72> is submitted to default queue <normal>.

<<Waiting for dispatch ...>> <<Starting on lsfhost.localdomain>> n1

n2

n4

n5

This example runs the job exactly the same as in Example 5-10 “Using the External Scheduler to Submit a Job to Run One Task per Node”, but additionally requests that node n3 is not to be used to run the job. Note that this command could have been written to exclude additional nodes.

Example 5-12launches the hostname command once on nodes n1 through n10 (n[1-10]):

Example 5-12 Using the External Scheduler to Launch a Command in Parallel on Ten Nodes

$ bsub -n 10 -ext "SLURM[nodelist=n[1-10]]" srun hostname

Example 5-13launches the hostname command on 10 cores on nodes with a dualcore SLURM feature assigned to them:

5.3 Submitting a Parallel Job 55