[jira] [Closed] (FLINK-28889) Hybrid shuffle should supports multiple consumer

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

     [ https://issues.apache.org/jira/browse/FLINK-28889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xintong Song closed FLINK-28889.
--------------------------------
    Resolution: Done

master (1.17): d11940c4a78c71548b5a06af50da2e5f9cb68918

> Hybrid shuffle should supports multiple consumer
> ------------------------------------------------
>
>                 Key: FLINK-28889
>                 URL: https://issues.apache.org/jira/browse/FLINK-28889
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Network
>    Affects Versions: 1.16.0
>            Reporter: Weijie Guo
>            Assignee: Weijie Guo
>            Priority: Critical
>              Labels: pull-request-available
>             Fix For: 1.17.0
>
>
> Hybrid shuffle does not support multiple consumer for single subpartition data. This will bring some defects, such as the inability to support partition reuse, speculative execution. In particular, it cannot support broadcast optimization, that is, hybrid shuffle writes multiple copies of broadcast data. This will cause a waste of memory and disk space and affect the performance of shuffle write phase. Ideally, for the full spilling strategy, any broadcast data (record or event) should only write one piece of data in the memory, and the same is true for the disk.



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