Fair-share scheduling policies

The AWS Batch scheduler evaluates when, where, and how to run jobs that are submitted to a job queue. If you don’t specify a scheduling policy when you create a job queue, the AWS Batch job scheduler defaults to a first-in, first-out (FIFO) strategy. A FIFO strategy might cause important jobs to get “stuck” behind jobs that were submitted earlier. By specifying a different scheduling policy, you can allocate compute resources according to your specific needs.

Note

If you want to schedule the specific order that jobs are run in, use the dependsOn parameter in SubmitJob to specify the dependencies for each job.

If you create a scheduling policy and attach it to a job queue, fair-share scheduling is turned on. If the job queue has a scheduling policy, the scheduling policy determines the order that jobs are run in. For more information, see Use fair-share scheduling policies to assign share identifiers.

Topics

• Use share identifiers to identify workloads

• Use fair-share scheduling policies to assign share identifiers

• Use fair-share scheduling to help schedule jobs

• Tutorial: Create a scheduling policy

• Reference: Scheduling policy template