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https://issues.apache.org/jira/browse/SPARK-6464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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SaintBacchus updated SPARK-6464:
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Description:
Nowadays, the transformation *coalesce* was always used to expand or reduce the
number of the partition in order to gain a good performance.
But *coalesce* can't make sure that the child partition will be executed in the
same executor as the parent partition. And this will lead to have a large
network transfer.
In some scenario such as I metioned in the title
> Add a new transformation of rdd named processCoalesce which was particularly
> to deal with the small and cached rdd
> -------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-6464
> URL: https://issues.apache.org/jira/browse/SPARK-6464
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.3.0
> Reporter: SaintBacchus
>
> Nowadays, the transformation *coalesce* was always used to expand or reduce
> the number of the partition in order to gain a good performance.
> But *coalesce* can't make sure that the child partition will be executed in
> the same executor as the parent partition. And this will lead to have a large
> network transfer.
> In some scenario such as I metioned in the title
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