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From "Avery Ching (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-667) Decouple Vertex data and Computation, make Computation and Combiner classes switchable
Date Thu, 16 May 2013 19:15:21 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13659850#comment-13659850
] 

Avery Ching commented on GIRAPH-667:
------------------------------------

+1, but let's wait one or two days for others to chime in, as again, this is a significant
change.
                
> Decouple Vertex data and Computation, make Computation and Combiner classes switchable
> --------------------------------------------------------------------------------------
>
>                 Key: GIRAPH-667
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-667
>             Project: Giraph
>          Issue Type: New Feature
>            Reporter: Maja Kabiljo
>            Assignee: Maja Kabiljo
>         Attachments: GIRAPH-667.patch
>
>
> Currently, our Vertex class holds a lot of stuff which shouldn't be there, related to
global graph and worker state. We should decouple vertex and computation, vertex should be
provided by the infrastructure and user should implement the computation.
> In many real-world applications there are several different stages, where different kind
of computation is done and different type of messages are sent. This can be done currently
by having complicated compute() and encoding the message type inside of the message. Much
better would be to provide a way to change which Computation is used by Giraph. Applications
can then be considered as pieces which can be put together in a pipeline coordinated by master.

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