LSF Version 7.3 - Platform LSF Configuration Reference

Enables preemption of and preemption by exclusive jobs.
LSB_DISABLE_LIMLOCK_EXCL=Y in lsf.conf must also be defined.
BACKFILL
Enables preemption of backfill jobs. Jobs from higher priority queues can preempt
jobs from backfill queues that are either backfilling reserved job slots or running as
normal jobs.
Default
Not defined. Exclusive and backfill jobs are only preempted if the exclusive low priority job is
running on a different host than the one used by the preemptive high priority job.
PREEMPTABLE_RESOURCES
Syntax
PREEMPTABLE_RESOURCES=resource_name ...
Description
Enables license preemption when preemptive scheduling is enabled (has no effect if
PREEMPTIVE is not also specified) and specifies the licenses that will be preemption
resources. Specify shared numeric resources, static or decreasing, that LSF is configured to
release (RELEASE=Y in lsf.shared, which is the default).
You must also configure LSF preemption actions to make the preempted application releases
its licenses. To kill preempted jobs instead of suspending them, set
TERMINATE_WHEN=PREEMPT in lsb.queues, or set JOB_CONTROLS in
lsb.queues and specify brequeue as the SUSPEND action.
Default
Not defined (if preemptive scheduling is configured, LSF preempts on job slots only)
PREEMPTION_WAIT_TIME
Syntax
PREEMPTION_WAIT_TIME=seconds
Description
Platform LSF License Scheduler only. You must also specify PREEMPTABLE_RESOURCES
in lsb.params).
The amount of time LSF waits, after preempting jobs, for preemption resources to become
available. Specify at least 300 seconds.
If LSF does not get the resources after this time, LSF might preempt more jobs.
Default
300 (5 minutes)
lsb.params
Platform LSF Configuration Reference 275