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Posted to issues@spark.apache.org by "zhoukang (JIRA)" <ji...@apache.org> on 2017/11/16 07:31:01 UTC
[jira] [Updated] (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 ]
zhoukang updated SPARK-22539:
-----------------------------
Description:
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.
was:
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.
> 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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