Improve the speed of host status updates

Configure the parameter LSB_SYNC_HOST_STAT_LIM in the file lsb.params.

This also improves the speed with which LSF reschedules jobs: the sooner LSF knows that a host has become unavailable, the sooner LSF reschedules any rerunnable jobs executing on that host.

For example, during maintenance operations, the cluster administrator might need to shut down half of the hosts at once. LSF can quickly update the host status and reschedule any rerunnable jobs that were running on the unavailable hosts.

When you define this parameter, mbatchd periodically obtains the host status from the master LIM, and then verifies the status by polling each sbatchd at an interval defined by the parameters MBD_SLEEP_TIME and LSB_MAX_PROBE_SBD.