"Reduce input records" counter name is misleading
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                 Key: HADOOP-1146
                 URL: https://issues.apache.org/jira/browse/HADOOP-1146
             Project: Hadoop
          Issue Type: Bug
            Reporter: David Bowen
         Assigned To: David Bowen


It has been pointed out that the counter name "reduce input records" is 
misleading; this number should be called "reduce input keys" or "reduce input 
groups".  It could also be useful to have the actual number of reduce input 
records, which should be the same as the number of map output records.


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