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https://issues.apache.org/jira/browse/SPARK-36423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17393646#comment-17393646
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Apache Spark commented on SPARK-36423:
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User 'Victsm' has created a pull request for this issue:
https://github.com/apache/spark/pull/33649
> Randomize blocks within a push request before pushing to improve block merge
> ratio
> ----------------------------------------------------------------------------------
>
> Key: SPARK-36423
> URL: https://issues.apache.org/jira/browse/SPARK-36423
> Project: Spark
> Issue Type: Sub-task
> Components: Shuffle, Spark Core
> Affects Versions: 3.2.0
> Reporter: Min Shen
> Priority: Major
>
> On the client side, we are currently randomizing the order of push requests
> before processing each request. In addition we can further randomize the
> order of blocks within each push request before pushing them.
> In our benchmark, this has resulted in a 60%-70% reduction of blocks that
> fail to be merged due to bock collision (the existing block merge ratio is
> already pretty good in general, and this further improves it).
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