| Key: |
HADOOP-3380
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| Type: |
New Feature
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| Status: |
Open
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| Priority: |
Major
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| Assignee: |
Unassigned
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| Reporter: |
Doug Cutting
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| Votes: |
0
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| Watchers: |
5
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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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Description
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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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need comparators in serializer framework
