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

                 Key: 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:

Small extract:

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.

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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