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https://issues.apache.org/jira/browse/FLINK-31757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17711895#comment-17711895
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RocMarshal commented on FLINK-31757:
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Thank you [~fanrui] & [~huwh] very much.
I'll prepare a design document for discussion.
> Optimize Flink un-balanced tasks scheduling
> -------------------------------------------
>
> Key: FLINK-31757
> URL: https://issues.apache.org/jira/browse/FLINK-31757
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Task
> Reporter: RocMarshal
> Assignee: RocMarshal
> Priority: Major
>
> Supposed we have a Job with 21 {{JobVertex}}. The parallelism of vertex A is
> 100, and the others are 5. If each {{TaskManager}} only have one slot, then
> we need 100 TMs.
> There will be 5 slots with 21 sub-tasks, and the others will only have one
> sub-task of A. Does this mean we have to make a trade-off between wasted
> resources and insufficient resources?
> From a resource utilization point of view, we expect all subtasks to be
> evenly distributed on each TM.
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