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https://issues.apache.org/jira/browse/SPARK-4917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14255543#comment-14255543
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Apache Spark commented on SPARK-4917:
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User 'maropu' has created a pull request for this issue:
https://github.com/apache/spark/pull/3760
> Add a function to convert into a graph with canonical edges in GraphOps
> -----------------------------------------------------------------------
>
> Key: SPARK-4917
> URL: https://issues.apache.org/jira/browse/SPARK-4917
> Project: Spark
> Issue Type: Improvement
> Components: GraphX
> Reporter: Takeshi Yamamuro
> Priority: Minor
>
> Convert bi-directional edges into uni-directional ones instead of
> 'canonicalOrientation' in GraphLoader.edgeListFile.
> This function is useful when a graph is loaded as it is and then is
> transformed into one with canonical edges.
> It rewrites the vertex ids of edges so that srcIds are bigger than dstIds,
> and merges the duplicated edges.
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