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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1981) Need to document the controls for sorting and grouping into the reduce
Date Tue, 02 Oct 2007 04:22:50 GMT
Need to document the controls for sorting and grouping into the reduce
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                 Key: HADOOP-1981
                 URL: https://issues.apache.org/jira/browse/HADOOP-1981
             Project: Hadoop
          Issue Type: Task
          Components: mapred
            Reporter: Owen O'Malley
            Assignee: Owen O'Malley
             Fix For: 0.15.0


The JavaDoc for the Reducer should document how to control the sort order of keys and values
via the JobConf methods:

{code}
  setOutputKeyComparatorClass
  setOutputValueGroupingComparator
{code}

Both methods desperately need better names. (I'd vote for setKeySortingComparator and setKeyGroupingComparator.)

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