HP XC System Software Administration Guide Version 3.0

Table 13-3. Environment Variables for LSF-HPC Enhancement (lsf.conf File) Environment Variables for
LSF-HPC Enhancement (lsf.conf File)
DescriptionEnvironment Variable
This entry specifies the TCP port used for communication between the LSF-HPC
allocation adapter (RLA) and the SLURM scheduler plug-in.
LSB_RLA_PORT=port_number
The default port number is 6883.
This entry defines the communications timeout between RLA and its clients (for
example, sbatchd and the SLURM scheduler plug-in.)
LSB_RLA_TIMEOUT=seconds
The default value is 10 seconds.
This entry specifies how often the LSF-HPC scheduler refreshes free node
information from RLA.
LSB_RLA_UPDATE=seconds
The default value is 600 seconds.
This entry specifies the directory to store the RLA status file. It enables RLA to
recover its original state when it restarts. When RLA first starts, it creates the
LSB_RLA_WORKDIR=directory
directory defined by LSB_RLA_WORKDIR if it does not exist, then creates
subdirectories for each host. Avoid using /tmp or any other directory that is
automatically cleaned up by the system. Unless your installation has restrictions
on the LSB_SHAREDIR directory, use the default for LSB_SHAREDIR.
The default value is LSB_SHAREDIR/cluster_name/rla_workdir.
This setting provides for either of two systemwide scheduling modes:LSB_SLURM_BESTFIT=Y
first-fit Under this mode, the scheduler chooses the first-met free nodes
to allocate.
By default, HPC SLURM integration works under first-fit mode.
best-fit Under this mode, the scheduler applies a set of criteria to choose
nodes with minimal capacities that satisfy the job request.
You can set LSB_SLURM_BESTFIT=Y to switch the scheduler
to work under best-fit mode.
In a heterogeneous HP XC system, a best-fit allocation may be
preferable for clusters running a mix of serial and parallel jobs.
In this context, best fit means: "the nodes that minimally satisfy
the requirements." Nodes with the maximum number of
processors are chosen first. For parallel and serial jobs, the
nodes with minimal memory, minimal tmp space, and minimal
weight are chosen.
LSF-HPC is configured to terminate unrecognized jobs in the SLURM lsf partition
periodically.
LSB_SLURM_NONLSF_USE=Y
This entry stops LSF-HPC from periodically terminating unrecognized jobs in the
SLURM lsf partition.
This setting enables external scheduling for LSF-HPCLSF_ENABLE_EXTSCHEDULER=Y|y
The default value is Y, which is automatically set by hpcinstall.
Example 131