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From "Sameer Paranjpye (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-525) Need raw comparators for hadoop record types
Date Tue, 12 Sep 2006 22:49:22 GMT
Need raw comparators for hadoop record types
--------------------------------------------

                 Key: HADOOP-525
                 URL: http://issues.apache.org/jira/browse/HADOOP-525
             Project: Hadoop
          Issue Type: Improvement
          Components: record
    Affects Versions: 0.6.0
            Reporter: Sameer Paranjpye
         Assigned To: Milind Bhandarkar
            Priority: Minor
             Fix For: 0.7.0


Raw comparators are not generated for types that are generated with the Hadoop record framework.
This could have a substantial performance impact when using hadoop record generated types
in Map/Reduce. The record i/o framework should auto-generate raw comparators for types.

Comparison for hadoop record i/o types is defined to be member wise comparison of objects.
A possible implementation could only deserialize one member from each object at a time, compare
them and either return or move on to the next member if the values are equal.

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