Maximilian Michels created FLINK-29501:
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Summary: Allow overriding JobVertex parallelisms during job
submission
Key: FLINK-29501
URL: https://issues.apache.org/jira/browse/FLINK-29501
Project: Flink
Issue Type: New Feature
Components: Runtime / Configuration, Runtime / REST
Reporter: Maximilian Michels
Assignee: Maximilian Michels
It is a common scenario that users want to make changes to the parallelisms in
the JobGraph. For example, because they discover that the job needs more or
less resources. There is the option to do this globally via the job
parallelism. However, for fine-tuned jobs jobs with potentially many branches,
tuning on the job vertex level is required.
This is to propose a way such that users can apply a mapping \{{jobVertexId =>
parallelism}} before the job is submitted without having to modify the JobGraph
manually.
One way to achieving this would be to add an optional map field to the Rest API
jobs endpoint. However, in deployment modes like the application mode, this
might not make sense because users do not have control the rest endpoint.
Similarly to how other job parameters are passed in the application mode, we
propose to add the overrides as a configuration parameter.
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