Job dependencies
When you submit an Amazon Batch job, you can specify the job IDs that the job depends on. When you do so, the Amazon Batch
scheduler ensures that your job is run only after the specified dependencies have successfully completed. After they
succeed, the dependent job transitions from PENDING
to RUNNABLE
and then to
STARTING
and RUNNING
. If any of the job dependencies fail, the dependent job automatically
transitions from PENDING
to FAILED
.
For example, Job A can express a dependency on up to 20 other jobs that must succeed before it can run. You can then submit additional jobs that have a dependency on Job A and up to 19 other jobs.
For array jobs, you can specify a SEQUENTIAL
type dependency without specifying a job ID so that
each child array job completes sequentially, starting at index 0. You can also specify an N_TO_N
type
dependency with a job ID. That way, each index child of this job must wait for the corresponding index child of each
dependency to complete before it can begin. For more information, see Array jobs.
To submit an Amazon Batch job with dependencies, see Tutorial: submit a job.