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https://issues.apache.org/jira/browse/SPARK-21436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16570573#comment-16570573
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Apache Spark commented on SPARK-21436:
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User 'holdenk' has created a pull request for this issue:
https://github.com/apache/spark/pull/22010
> Take advantage of known partioner for distinct on RDDs
> ------------------------------------------------------
>
> Key: SPARK-21436
> URL: https://issues.apache.org/jira/browse/SPARK-21436
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.3.0
> Reporter: holdenk
> Priority: Minor
>
> If we have a known partitioner we should be able to avoid the shuffle.
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