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https://issues.apache.org/jira/browse/SPARK-9860?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16094076#comment-16094076
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Carson Wang commented on SPARK-9860:
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We are working on this and also improving the current implementation of
changing reducer number at runtime.
Here is a design doc we proposed.
https://docs.google.com/document/d/1WCJ2BmA8_dJL_jmYie_x9ZCrz7r3ZjleJSoX0dlDXaw/edit?usp=sharing
> Join: Determine the join strategy (broadcast join or shuffle join) at runtime
> -----------------------------------------------------------------------------
>
> Key: SPARK-9860
> URL: https://issues.apache.org/jira/browse/SPARK-9860
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Yin Huai
>
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