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From "Maja Kabiljo (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GIRAPH-667) Decouple Vertex data and Computation, make Computation and Combiner classes switchable
Date Wed, 15 May 2013 18:07:17 GMT
Maja Kabiljo created GIRAPH-667:
-----------------------------------

             Summary: 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


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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