LSF Version 7.3 - Platform LSF Configuration Reference

LSB_RMS_MAXNUMRAILS
Syntax
LSB_RMS_MAXNUMRAILS=integer
Description
Maximum number of rails in a system. Specifies a maximum value for the rails argument to
the topology scheduler options specified in:
•
-extsched option of bsub
•
DEFAULT_EXTSCHED and MANDATORY_EXTSCHED in lsb.queues
Default
32
LSB_RMS_MAXPTILE
Syntax
LSB_RMS_MAXPTILE=integer
Description
Maximum number of CPUs per node in a system. Specifies a maximum value for the ptile
argument to the topology scheduler options specified in:
•
-extsched option of bsub
•
DEFAULT_EXTSCHED and MANDATORY_EXTSCHED in lsb.queues
Default
32
LSB_SLURM_BESTFIT
Syntax
LSB_SLURM_BESTFIT=y | Y
Description
Enables best-fit node allocation for SLURM jobs.
By default, LSF applies a first-fit allocation policy to select from the nodes available for the job.
The allocations are made left to right for all parallel jobs, and right to left for all serial jobs (all
other job requirements being equal).
In a heterogeneous SLURM cluster, a best-fit allocation may be preferable for clusters where
a mix of serial and parallel jobs run. In this context, best fit means: "the nodes that minimally
satisfy the requirements." Nodes with the maximum number of CPUs are chosen first. For
parallel and serial jobs, the nodes with minimal memory, minimal tmp space, and minimal
weight are chosen.
lsf.conf
430 Platform LSF Configuration Reference