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From "Jesse (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-701) Communication improvement using one-to-all message sending
Date Wed, 31 Jul 2013 17:15:53 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13725438#comment-13725438
] 

Jesse commented on GIRAPH-701:
------------------------------

Messages are serialized and copied out when sending. So you can reuse the message object in
your vertex compute method.
                
> Communication improvement using one-to-all message sending
> ----------------------------------------------------------
>
>                 Key: GIRAPH-701
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-701
>             Project: Giraph
>          Issue Type: New Feature
>            Reporter: Jesse
>         Attachments: GIRAPH-701.patch
>
>
> Using one-to-all message sending to send one message copy to multiple target vertices
on the same worker.
> To enable this feature, use conf.enableOneToAllMsgSending(). 
> Pagerank benchmarking (Partitions: 640, Edges per vertex: 500, Vertices: 200000000, Workers:
40)
> shows that the time per superstep is reduced by 40%. 

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