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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2021/12/06 12:05:00 UTC

[jira] [Commented] (SPARK-37559) ShuffledRowRDD get preferred locations order by reduce size

    [ https://issues.apache.org/jira/browse/SPARK-37559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17453971#comment-17453971 ] 

Apache Spark commented on SPARK-37559:
--------------------------------------

User 'ulysses-you' has created a pull request for this issue:
https://github.com/apache/spark/pull/34820

> ShuffledRowRDD get preferred locations order by reduce size
> -----------------------------------------------------------
>
>                 Key: SPARK-37559
>                 URL: https://issues.apache.org/jira/browse/SPARK-37559
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.3.0
>            Reporter: XiDuo You
>            Priority: Major
>
> The coalesced partition can contain several reduce partitions. The preferred locations of the RDD partition should be the biggest reduce partition before coalesced. So it can get a better data locality and reduce the network traffic.



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