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https://issues.apache.org/jira/browse/HIVE-7613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14274401#comment-14274401
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Szehon Ho commented on HIVE-7613:
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Very belated HNY! I uploaded this pdf as a wiki page, which is more
maintainable:
[https://cwiki.apache.org/confluence/display/Hive/Hive+on+Spark:+Join+Design+Master|https://cwiki.apache.org/confluence/display/Hive/Hive+on+Spark:+Join+Design+Master].
Its linked and a child of :
[DesignDocs|https://cwiki.apache.org/confluence/display/Hive/DesignDocs] page.
> Research optimization of auto convert join to map join [Spark branch]
> ---------------------------------------------------------------------
>
> Key: HIVE-7613
> URL: https://issues.apache.org/jira/browse/HIVE-7613
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Chengxiang Li
> Assignee: Suhas Satish
> Priority: Minor
> Labels: TODOC-SPARK
> Fix For: spark-branch
>
> Attachments: HIve on Spark Map join background.docx, Hive on Spark
> Join Master Design.pdf, small_table_broadcasting.pdf
>
>
> ConvertJoinMapJoin is an optimization the replaces a common join(aka shuffle
> join) with a map join(aka broadcast or fragment replicate join) when
> possible. we need to research how to make it workable with Hive on Spark.
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