HP XC System 3.x Software - Manual (Page 79)

Refer to the LSF bsub command manpage for additional information about using the external scheduler
(-ext) option. See the srun manpage for more details about the above options and their arguments.
Consider an HP XC system configuration in which lsfhost.localdomain is the LSF execution host and
nodes n[1-10] are compute nodes in the lsf partition. All nodes contain two cores, providing 20 cores
for use by LSF-HPC jobs.
Example 9-1 shows one way to submit a parallel job to run on a specific node or nodes.
Example 9-1 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 .
<>
<>
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 9-2 shows one way to submit a parallel job to run one task per node.
Example 9-2 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 .
<>
<>
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 9-3 shows one way to submit a parallel job to avoid running on a particular node.
Example 9-3 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 .
<>
<>
n1
n2
n4
n5
This example runs the job exactly the same as in Example 9-2, “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.
Submitting a Job from a Non-HP XC Host
To submit a job from a non-HP XC host to the HP XC system, use the LSF -R option, and the HP XC host type
SLINUX64
(defined in lsf.shared) in the job submission resource requirement string. The necessary
resource requirement string to submit a job from a non-HP XC host is specified as follows:
-R "type=SLINUX64"
The following example shows this resource requirement string in an LSF command:
$ bsub -R "type=SLINUX64" -n4 -I srun hostname
Using LSF-HPC 79