PowerScale OneFS 9.5.0.0 Web Administration Guide

Job priorities

Job priorities determine the precedence of a job when more than the maximum number of jobs attempt to run simultaneously. The Job Engine assigns a priority value from 1 to 10 to every job, with 1 the most important and 10 the least important.

You can configure the maximum number of jobs that can run simultaneously. It is recommended that you run no more than three jobs simultaneously. If more than the configured maximum number of jobs of different exclusion sets attempt to run simultaneously, Job Engine manages priorities as follows:

• Suppose that the maximum number of jobs are running and a higher-priority job is queued. Job Engine pauses the job with the lowest priority to allow the higher-priority job to run. Job Engine automatically resumes the paused job when one of the other jobs completes.
• Suppose that fewer than the maximum number of jobs are running when a higher-priority job is queued. If a lower-priority job has an exclusion set that overlaps the exclusion set of the new, higher-priority job, Job Engine pauses the lower-priority job to allow the higher-priority job to run.
• In the case of a tie, Job Engine will continue running the job that is already running.