HP XC System 2.x Software - Manual (Page 94)

The basic synopsis of the bsub command is:
bsub [ bsub_options] jobname [ job_options]
The HP XC system has several features that make it optimal for running parallel applications,
particularly (but not exclusively) MPI applications. You can use the
bsub command’s -n to
request more than one CPU for a job. This option, coupled with the external SLURM scheduler,
discussed in Section 7.4.2, gives you much flexibility in selecting resources and shaping how
the job is executed on those resources.
LSF-HPC, like standard LSF, reserves the requested number of nodes and executes one instance
of the job on the first reserved node, when you request multiple nodes. Use the
srun command
or the mpirun command with the -srun option in your jobs to launch parallel applications.
The -srun can be set implicitly for the mpirun command; see Section 7.4.5 for more
information on using the mpirun -srun command.
Most parallel applications rely on rsh or ssh to "launch" remote tasks. The ssh utility is
installed on the HP XC system by default. If you configured the ssh keys to allow unprompted
access to other nodes in the HP XC system, the parallel applications can use ssh .
7.4.1 Summary of the LSF bsub Command Format
This section provides a summary of the format LSF bsub command on the HP XC system. The
bsub command can have the following formats:
bsub
When you invoke the bsub command without any arguments, you are prompted for a
command from standard input.
bsub [bsub-options] [ srun ] jobname [job-arguments]
This is the bsub command format to submit a serial job. The srun command is required
to run parallel jobs on the allocated compute node. Refer to Section 7.4.3.
bsub -n num-procs [bsub-options] jobname [job-arguments]
This is the standard bsub command format to submit a parallel job to LSF execution host.
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 -n num-procs parameter, which specifies the number
of processors the job requests. Refer to Section 7.4.4 for information about running jobs.
Refer to Section 7.4.6 for information about running scripts.
bsub -n num-procs [bsub-options] srun [srun-options] jobname [job-arguments]
This is the bsub command format to submit a parallel job to LSF node allocation (compute
nodes). LSF node allocation is created by -n num-procs parameter, which specifies the
number of processors the job requests. srun command is required to run jobs on LSF node
allocation. Refer to Section 7.4.4.
bsub -n num-procs [bsub-options] mpirun [mpirun-options] -srun
[srun-options] mpi-jobname [job-options]
This is the bsub command format to submit an HP-MPI job. The -srun option is
required. Refer to Section 7.4.5.
bsub -n num-procs -ext "SLURM[slurm-arguments]" [bsub-options]
[srun [srun-options]] jobname [job-options]
This is the bsub command format to submit a parallel job to LSF node allocation (compute
nodes) using the external scheduler option. The external scheduler option provides
7-10 Using LSF