[jira] [Commented] (FLINK-18690) Implement LocalInputPreferredSlotSharingStrategy

["Zhu Zhu (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-18690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17168531#comment-17168531 ] 

Zhu Zhu commented on FLINK-18690:
---------------------------------

There are known limitations of LocalInputPreferredSlotSharingStrategy which leads to suboptimal results of ExecutionSlotSharingGroup creation.

> Implement LocalInputPreferredSlotSharingStrategy
> ------------------------------------------------
>
>                 Key: FLINK-18690
>                 URL: https://issues.apache.org/jira/browse/FLINK-18690
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Runtime / Coordination
>            Reporter: Andrey Zagrebin
>            Assignee: Zhu Zhu
>            Priority: Major
>              Labels: pull-request-available
>
> Implement ExecutionSlotSharingGroup, SlotSharingStrategy and default LocalInputPreferredSlotSharingStrategy.
> The default strategy would be LocalInputPreferredSlotSharingStrategy. It will try to reduce remote data exchanges. Subtasks, which are connected and belong to the same SlotSharingGroup, tend to be put in the same ExecutionSlotSharingGroup.
> See [design doc|https://docs.google.com/document/d/10CbCVDBJWafaFOovIXrR8nAr2BnZ_RAGFtUeTHiJplw/edit#heading=h.t4vfmm4atqoy]



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