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https://issues.apache.org/jira/browse/FLINK-13867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16916407#comment-16916407
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Kurt Young commented on FLINK-13867:
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This is similar with FLINK-10995 but is actually different
> Write file only once when doing blocking broadcast shuffle
> ----------------------------------------------------------
>
> Key: FLINK-13867
> URL: https://issues.apache.org/jira/browse/FLINK-13867
> Project: Flink
> Issue Type: New Feature
> Components: Runtime / Network
> Reporter: Kurt Young
> Priority: Major
>
> When doing broadcast shuffle in BATCH/BLOCKING fashion, the producer can only
> write one copy of output data for all possible consumers, instead of writing
> one copy of data for each consumer.
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