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From "Eli Reisman (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (GIRAPH-314) Implement better message grouping to improve performance in SimpleTriangleClosingVertex
Date Thu, 23 Aug 2012 21:02:42 GMT

     [ https://issues.apache.org/jira/browse/GIRAPH-314?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eli Reisman updated GIRAPH-314:
-------------------------------

    Attachment: GIRAPH-314-1.patch
    
> Implement better message grouping to improve performance in SimpleTriangleClosingVertex
> ---------------------------------------------------------------------------------------
>
>                 Key: GIRAPH-314
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-314
>             Project: Giraph
>          Issue Type: Improvement
>          Components: examples
>    Affects Versions: 0.2.0
>            Reporter: Eli Reisman
>            Assignee: Eli Reisman
>            Priority: Trivial
>             Fix For: 0.2.0
>
>         Attachments: GIRAPH-314-1.patch
>
>
> After running SimpleTriangleClosingVertex at scale I'm thinking the sendMessageToAllEdges()
is pretty in the code, but its not a good idea in practice since each vertex V sends degree(V)^2
messages right in the first superset in this algorithm. Could do something with a combiner
etc. but just grouping messages by hand at the application level by using IntArrayListWritable
again does the trick fine.
> Probably should have just done it this way before, but sendMessageToAllEdges() looked
so nice. Sigh. Changed unit tests to reflect this new approach, passes mvn verify and cluster,
etc.

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