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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/05/21 04:12:43 UTC

[jira] [Resolved] (SPARK-22539) Add second order for rangepartitioner since partition number may be small if the specified key is skewed

     [ https://issues.apache.org/jira/browse/SPARK-22539?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon resolved SPARK-22539.
----------------------------------
    Resolution: Incomplete

> Add second order for rangepartitioner since partition number may be small if the specified key is skewed
> --------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-22539
>                 URL: https://issues.apache.org/jira/browse/SPARK-22539
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.1.0
>            Reporter: zhoukang
>            Priority: Major
>              Labels: bulk-closed
>
> The rangepartitioner generated from shuffle exchange may cause partiton skew if sort key is skewed.
> We can add second order for rangepartitioner since partition number may be small if the specified key is skewed.
> This improvement comes from real case.



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