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https://issues.apache.org/jira/browse/FLINK-28889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Weijie Guo updated FLINK-28889:
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Summary: Hybrid shuffle should supports multiple consumer (was: Hybrid
shuffle writes multiple copies of broadcast data)
> 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
> 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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