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From "Maja Kabiljo (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GIRAPH-414) Create BinaryCombiner ands specialized message store for it
Date Thu, 08 Nov 2012 22:18:11 GMT
Maja Kabiljo created GIRAPH-414:
-----------------------------------

             Summary: Create BinaryCombiner ands specialized message store for it
                 Key: GIRAPH-414
                 URL: https://issues.apache.org/jira/browse/GIRAPH-414
             Project: Giraph
          Issue Type: Improvement
            Reporter: Maja Kabiljo
            Assignee: Maja Kabiljo


Current combiner interface is very general, but also doesn't provide the best performance.
All the combiners we currently have are binary combiners, i.e. they can combine two messages
into one. Having a lists around this simple concept makes it slower and requires more object
creations.
Adding BinaryCombiner, and a specialized message store which will be used with it. This message
store has only one message per vertex instead of having a collection per vertex.

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