LSF Version 7.3 - Platform LSF Configuration Reference

If JOBS are configured in the Limit section, the most restrictive limit is applied.
If HOSTS are configured in the Limit section, SLOTS is the number of running and suspended
jobs on a host. If preemptive scheduling is used, the suspended jobs are not counted as using
a job slot.
To fully use the CPU resource on multiprocessor hosts, make the number of job slots equal
to or greater than the number of processors.
Use this parameter to prevent a host from being overloaded with too many jobs, and to
maximize the throughput of a machine.
Use “!” to make the number of job slots equal to the number of CPUs on a host.
If the number of CPUs in a host changes dynamically, mbatchd adjusts the maximum number
of job slots per host accordingly. Allow the mbatchd up to 10 minutes to get the number of
CPUs for a host. During this period the value of SLOTS is 1.
If only QUEUES are configured in the Limit section, SLOTS is the maximum number of job
slots available to the listed queues for any hosts, users, or projects.
If only USERS are configured in the Limit section, SLOTS is the maximum number of job slots
that the users or user groups can use on any hosts, queues, or projects.
If only HOSTS are configured in the Limit section, SLOTS is the maximum number of job
slots that are available to the listed hosts for any users, queues, or projects.
If only PROJECTS are configured in the Limit section, SLOTS is the maximum number of job
slots that are available to the listed projects for any users, queues, or hosts.
Use QUEUES or PER_QUEUE, USERS or PER_USER, HOSTS or PER_HOST, and
PROJECTS or PER_PROJECT in combination to further limit job slots per processor available
to resource consumers.
In horizontal format, use only one SLOTS line per Limit section.
In vertical format, use empty parentheses () or a dash (-) to indicate the default value (no limit).
Fields cannot be left blank.
Default
No limit
Example
SLOTS=20
SLOTS_PER_PROCESSOR
Syntax
SLOTS_PER_PROCESSOR=number
SLOTS_PER_PROCESSOR
- | number
lsb.resources
Platform LSF Configuration Reference 337