HP XC System 2.x Software User Manual

Page 96

Example 7-2: 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 .

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 nodes using the specified nodes

and

as two of the four nodes.

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

2 processors, providing 20 processors for use by LSF jobs.

Example 7-3 shows one way to submit a parallel job to run one task per node.

Example 7-3: 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 .

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 processors on four different nodes (one

task per node).

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

2 processors, providing 20 processors for use by LSF jobs.

Example 7-4 shows one way to submit a parallel job to avoid running on a particular node. Note
that this command could have been written to exclude additional nodes.

Example 7-4: 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 .

7-12

Using LSF