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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2021/11/10 08:54:00 UTC
[jira] [Commented] (SPARK-37267) OptimizeSkewInRebalancePartitions
support optimize non-root node
[ https://issues.apache.org/jira/browse/SPARK-37267?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17441578#comment-17441578 ]
Apache Spark commented on SPARK-37267:
--------------------------------------
User 'ulysses-you' has created a pull request for this issue:
https://github.com/apache/spark/pull/34542
> OptimizeSkewInRebalancePartitions support optimize non-root node
> ----------------------------------------------------------------
>
> Key: SPARK-37267
> URL: https://issues.apache.org/jira/browse/SPARK-37267
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.3.0
> Reporter: XiDuo You
> Priority: Major
>
> `OptimizeSkewInRebalancePartitions` now is applied if the `RebalancePartitions` is the root node, but sometimes, we expect a local sort after do RebalancePartitions that can improve the compression ratio.
> After SPARK-36184, we make validate easy that whether the rule introduces extra shuffle or not and the output partitioning is ensured by `AQEShuffleReadExec.outputPartitioning`.
> So it is safe to make `OptimizeSkewInRebalancePartitions` support optimize non-root node.
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