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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3380) need comparators in serializer framework
Date Tue, 13 May 2008 16:31:55 GMT
need comparators in serializer framework
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                 Key: HADOOP-3380
                 URL: https://issues.apache.org/jira/browse/HADOOP-3380
             Project: Hadoop Core
          Issue Type: New Feature
          Components: io
            Reporter: Doug Cutting


The new serialization framework permits Hadoop to incorporate different serialization systems,
including Hadoop's Writable, Thrift, Java Serialization, etc.  It provides a generic, extensible
means (SerializationFactory) to create serializers and deserializers for arbitrary Java classes.
 However it does not include a generic means to create comparators for these classes.  Comparators
are required for MapReduce keys and many other computations.  Thus we should enhance the serialization
framwork to provide comparators too.

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