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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/11/16 07:33:00 UTC

[jira] [Assigned] (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 ]

Apache Spark reassigned SPARK-22539:
------------------------------------

    Assignee:     (was: Apache Spark)

> 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
>
> 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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