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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1126) shuffle should use serialization to get comparator
Date Tue, 20 Oct 2009 17:15:59 GMT
shuffle should use serialization to get comparator

                 Key: MAPREDUCE-1126
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1126
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: task
            Reporter: Doug Cutting

Currently the key comparator is defined as a Java class.  Instead we should use the Serialization
API to create key comparators.  This would permit, e.g., Avro-based comparators to be used,
permitting efficient sorting of complex data types without having to write a RawComparator
in Java.

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