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https://issues.apache.org/jira/browse/SPARK-1531?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-1531.
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Resolution: Won't Fix
> GraphX should have messageRDD to enable OutOfCore messages
> ----------------------------------------------------------
>
> Key: SPARK-1531
> URL: https://issues.apache.org/jira/browse/SPARK-1531
> Project: Spark
> Issue Type: Improvement
> Components: GraphX
> Affects Versions: 0.9.1
> Reporter: Jianfeng Jia
>
> There is no such `messageRDD` in Pregel function.
> Most of the sendMessage is directly sent one Scala Iterator. Like the below
> one in staticPageRank:
> ```
> def sendMessage(edge: EdgeTriplet[Double, Double]) =
> Iterator((edge.dstId, edge.srcAttr * edge.attr))
> ```
> For some message intensively computation on some bigger graph, it will throw
> OOM exceptions. If we have some more general messageRDD, at lease we can set
> MessageRDD.persist(DISK) to enable it flush onto the disk.
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