Details
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New Feature
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Status: Open
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Major
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Resolution: Unresolved
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None
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None
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Description
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.