The final merge on the reduces should feed the reduce directly
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                 Key: HADOOP-613
                 URL: http://issues.apache.org/jira/browse/HADOOP-613
             Project: Hadoop
          Issue Type: Improvement
            Reporter: Owen O'Malley
         Assigned To: Mahadev konar
             Fix For: 0.8.0


The final merge on the input to the reduce should use the iterators from 
HADOOP-611 directly rather than using a round trip to disk.

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