LSF Version 7.3 - Administering Platform LSF

Administering Platform LSF 457
Job Priorities
bjobs -l [job_ID] Displays the current job priority and the job priority at submission time. Job
priorities are changed by the job owner, LSF and queue administrators, and
automatically when automatic job priority escalation is enabled.
bparams -l Displays values for:
◆ The maximum user priority, MAX_USER_PRIORITY
◆ The default submission priority, MAX_USER_PRIORITY/2
◆ The value and frequency used for automatic job priority escalation,
JOB_PRIORITY_OVER_TIME
Automatic Job Priority Escalation
Automatic job priority escalation automatically increases job priority of jobs that
have been pending for a specified period of time. User-assigned job priority (see
User-Assigned Job Priority on page 455) must also be configured.
As long as a job remains pending, LSF automatically increases the job priority
beyond the maximum priority specified by MAX_USER_PRIORITY. Job priority
is not increased beyond the value of
max_int on your system.
Configure job priority escalation
1 To configure job priority escalation edit lsb.params and define
JOB_PRIORITY_OVER_TIME.
User-assigned job priority must also be configured,
2 Use bparams -l to display the values of JOB_PRIORITY_OVER_TIME.
Syntax JOB_PRIORITY_OVER_TIME=increment/interval
Where:
increment
Specifies the value used to increase job priority every interval minutes. Valid values
are positive integers.
interval
Specifies the frequency, in minutes, to increment job priority. Valid values are
positive integers.
Example JOB_PRIORITY_OVER_TIME=3/20
Specifies that every 20 minute interval increment to job priority of pending jobs by
3.
Absolute Job Priority Scheduling
Absolute job priority scheduling (APS) provides a mechanism to control the job
dispatch order to prevent job starvation.