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Posted to issues@flink.apache.org by "RocMarshal (Jira)" <ji...@apache.org> on 2023/09/25 06:20:00 UTC

[jira] [Updated] (FLINK-31757) Support Balanced Tasks Scheduling

     [ https://issues.apache.org/jira/browse/FLINK-31757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

RocMarshal updated FLINK-31757:
-------------------------------
    Summary: Support Balanced Tasks Scheduling  (was: Optimize Flink un-balanced tasks scheduling)

> Support Balanced Tasks Scheduling
> ---------------------------------
>
>                 Key: FLINK-31757
>                 URL: https://issues.apache.org/jira/browse/FLINK-31757
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Coordination
>            Reporter: RocMarshal
>            Assignee: RocMarshal
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: image-2023-04-13-08-04-04-667.png
>
>
> 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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