Platform LSF Administration Guide Version 6.2

Specifying Resource Usage Limits
Administering Platform LSF
464
Specifying Resource Usage Limits
Queues can enforce resource usage limits on running jobs. LSF supports most of the
limits that the underlying operating system supports. In addition, LSF also supports a
few limits that the underlying operating system does not support.
Specify queue-level resource usage limits using parameters in
lsb.queues.
Specifying queue-level resource usage limits
Limits configured in lsb.queues apply to all jobs submitted to the queue. Job-level
resource usage limits specified at job submission override the queue definitions.
Maximum value
only
Specify only a maximum value for the resource.
For example, to specify a maximum run limit, use one value for the RUNLIMIT
parameter in
lsb.queues:
RUNLIMIT = 10
The maximum run limit for the queue is 10 minutes. Jobs cannot run for more than 10
minutes. Jobs in the RUN state for longer than 10 minutes are killed by LSF.
If only one run limit is specified, jobs that are submitted with
bsub -W with a run limit
that exceeds the maximum run limit will not be allowed to run. Jobs submitted without
bsub -W
will be allowed to run but will be killed when they are in the RUN state for
longer than the specified maximum run limit.
For example, in
lsb.queues:
RUNLIMIT = 10
The maximum run limit for the queue is 10 minutes. Jobs cannot run for more than 10
minutes.
Default and
maximum values
If you specify two limits, the first one is the default (soft) limit for jobs in the queue and
the second one is the maximum (hard) limit. Both the default and the maximum limits
must be positive integers. The default limit must be less than the maximum limit. The
default limit is ignored if it is greater than the maximum limit.
Use the default limit to avoid having to specify resource usage limits in the
bsub
command.
For example, to specify a default and a maximum run limit, use two values for the
RUNLIMIT parameter in
lsb.queues:
RUNLIMIT = 10 15
◆ The first number is the default run limit applied to all jobs in the queue that are
submitted without a job-specific run limit (without
bsub -W).
◆ The second number is the maximum run limit applied to all jobs in the queue that
are submitted with a job-specific run limit (with
bsub -W). The default run limit
must be less than the maximum run limit.
You can specify both default and maximum values for the following resource usage
limits in
lsb.queues:
◆ CPULIMIT
◆ DATALIMIT
◆ MEMLIMIT