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Posted to issues@spark.apache.org by "Sean Owen (JIRA)" <ji...@apache.org> on 2016/01/12 14:44:40 UTC

[jira] [Resolved] (SPARK-2011) Eliminate duplicate join in Pregel

     [ https://issues.apache.org/jira/browse/SPARK-2011?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen resolved SPARK-2011.
------------------------------
    Resolution: Won't Fix

> Eliminate duplicate join in Pregel
> ----------------------------------
>
>                 Key: SPARK-2011
>                 URL: https://issues.apache.org/jira/browse/SPARK-2011
>             Project: Spark
>          Issue Type: Improvement
>          Components: GraphX
>            Reporter: Ankur Dave
>            Assignee: Ankur Dave
>            Priority: Minor
>
> In the iteration loop, Pregel currently performs an innerJoin to apply messages to vertices followed by an outerJoinVertices to join the resulting subset of vertices back to the graph. These two operations could be merged into a single call to joinVertices, which should be reimplemented in a more efficient manner. This would allow us to examine only the vertices that received messages.



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