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Administering Platform LSF - SAS

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Tuning LIM<br />

Tuning LIM<br />

LIM provides critical services to all <strong>LSF</strong> components. In addition to the timely<br />

collection of resource information, LIM provides host selection and job<br />

placement policies. If you are using <strong>Platform</strong> MultiCluster, LIM determines how<br />

different clusters should exchange load and resource information. You can<br />

tune LIM policies and parameters to improve performance.<br />

LIM uses load thresholds to determine whether to place remote jobs on a host.<br />

If one or more <strong>LSF</strong> load indices exceeds the corresponding threshold (too<br />

many users, not enough swap space, etc.), then the host is regarded as busy<br />

and LIM will not recommend jobs to that host. You can also tune LIM load<br />

thresholds.<br />

You can also change default LIM behavior and pre-select hosts to be elected<br />

master to improve performance.<br />

In this section ◆ “Adjusting LIM Parameters” on page 483<br />

◆ “Load Thresholds” on page 484<br />

◆ “Changing Default LIM Behavior to Improve Performance” on page 487<br />

482<br />

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

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