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Administering Platform LSF - SAS

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Using Historical and Committed Run Time<br />

Limitation<br />

COMMITTED_RUN_TIME_FACTOR can be any positive value between 0.0 and<br />

1.0. The default value is 0.0. As the value of<br />

COMMITTED_RUN_TIME_FACTOR approaches 1.0, more weight is given to<br />

the committed run time in the calculation of the dynamic priority.<br />

If you use queue-level fairshare, and a running job has a committed run time,<br />

you should not switch that job to or from a fairshare queue (using bswitch).<br />

The fairshare calculations will not be correct.<br />

Run time displayed by bqueues and bhpart<br />

The run time displayed by bqueues and bhpart is the sum of the actual,<br />

accumulated run time and the historical run time, but does not include the<br />

committed run time.<br />

Example<br />

The following fairshare parameters are configured in lsb.params:<br />

CPU_TIME_FACTOR = 0<br />

RUN_JOB_FACTOR = 0<br />

RUN_TIME_FACTOR = 1<br />

COMMITTED_RUN_TIME_FACTOR = 1<br />

Without a committed run time factor, dynamic priority for the job owner drops<br />

gradually while a job is running:<br />

232<br />

<strong>Administering</strong> <strong>Platform</strong> <strong>LSF</strong>

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