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From "Thomas Jungblut (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HAMA-458) Add Combiners
Date Wed, 19 Oct 2011 19:09:10 GMT
Add Combiners
-------------

                 Key: HAMA-458
                 URL: https://issues.apache.org/jira/browse/HAMA-458
             Project: Hama
          Issue Type: New Feature
            Reporter: Thomas Jungblut
             Fix For: 0.5.0


We have spoken about it on the mailing list:
http://www.mail-archive.com/hama-dev@incubator.apache.org/msg05540.html

Small extract:

{quote}
E.g: when should the combiner be called and in which form. In MapReduce they
are plain reducers, so we can have the same model but not grouped by a key
rather than the class name of the message.
{quote}

Especially if we could collect all task data on the same host and combine them. This would
yield into better performance.
We need a smart idea. 

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