Priority and Fairshare

Your job’s priority is determined by the following factors:

Job Age (time in queue), Job Size (measured in time), Partition weight, QoS weight, Fairshare factor

• Age: As your job waits in the queue, its priority will increase.

• Size: Jobs with a shorter duration will have a small increase in priority.

• Partition weight: In our configuration, partition priority weights can be ignored.

• QoS weight: In some groups, different QoS tiers are available with different priority values.

• Fairshare: Your fairshare value is based on your share (the portion of cluster resources owned by your group) and your effective usage value (which decays with a half-life of 14 days). Groups with a low usage-to-share ratio will have increased priority relative to groups with a higher ratio.