HP XC System 4.x Software - Manual (Page 95)

10.10.1 Examining System Core Status
The bhosts command displays LSF resource usage information. This command is useful to
examine the status of the system cores. The bhosts command provides a summary of the jobs
on the system and information about the current state of LSF. For example, it can be used to
determine if LSF is ready to start accepting batch jobs.
LSF daemons run on only one node in the HP XC system, so the bhosts command will list one
host, which represents all the resources of the HP XC system. The total number of cores for that
host should be equal to the total number of cores assigned to the SLURM lsf partition.
By default, this command returns the host name, host status, and job state statistics.
The following example shows the output from the bhosts command:
$ bhosts
HOST_NAME STATUS JL/U MAX NJOBS RUN SSUSP USUSP RSV
lsfhost.localdomain ok - 16 0 0 0 0 0
Of note in the bhosts output:
• The HOST_NAME column displays the name of the LSF execution host.
• The MAX column displays the total core count (usable cores) of all available computer nodes
in the lsf partition.
• The STATUS column shows the state of LSF and displays a status of either ok or closed.
• The NJOBS column displays the number of jobs. Note that in LSF terminology, a parallel
job with 10 tasks counts as 10 jobs.
10.10.2 Getting Information About the LSF Execution Host Node
The lshosts command displays resource information about the LSF cluster. This command is
useful for verifying machine-specific information.
LSF daemons run on only one node in the HP XC system, so the lshosts command will list
one host — which represents all the resources assigned to it by the HP XC system. The total
number of cores for that host should be equal to the total number of cores assigned to the SLURM
lsf
partition.
By default, lshosts returns the following information: host name, host type, host model, core
factor, number of cores, total memory, total swap space, server information, and static resources.
The following example shows the output from the lshosts command:
$ lshosts
HOST_NAME type model cpuf ncpus maxmem maxswp server RESOURCES
lsfhost.loc SLINUX6 Itanium2 16.0 12 3456M - Yes (slurm)
n7 UNKNOWN UNKNOWN_ 1.0 - - - No ()
n8 UNKNOWN UNKNOWN_ 1.0 - - - No ()
n2 UNKNOWN UNKNOWN_ 1.0 - - - No ()
Of note in the lshosts output:
•
The HOST_NAME column displays the name of the LSF execution host,
lsfhost.localdomain
and any other HP XC nodes that have been granted a floating
client license because LSF commands were executed on them. LSF does not know about
these floating client hosts, so they are listed as UNKNOWN types and models.
• The type column displays the type of resource. This value is SLINUX64 for all HP XC
systems.
• The ncpus column displays the total core count (usable cores) of all available computer
nodes in the lsf partition.
• The maxmem column displays minimum maxmem over all available computer nodes in the
lsf
partition.
• The maxtmp column (not shown) displays minimum maxtmp over all available computer
nodes in the lsf partition. Use the lshosts -l command to display this column.
10.10 Determining Available System Resources 95