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https://issues.apache.org/jira/browse/HADOOP-1986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12546424
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Tom White commented on HADOOP-1986:
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I've attached a second patch, serializer-v2.patch, which has the Serialization
abstraction and the object reuse facility for Deserializers that Doug
suggested. Tests, warnings and javadoc still need attending to.
I've also included some examples that show how to use different serialization
frameworks for running MapReduce programs. It includes Writable, Thrift, Record
IO and Java Serialization examples. It might be good to improve these so they
can be included in Hadoop - they are pretty rough and ready at the moment,
which is why they are a standalone tarball.
> Add support for a general serialization mechanism for Map Reduce
> ----------------------------------------------------------------
>
> Key: HADOOP-1986
> URL: https://issues.apache.org/jira/browse/HADOOP-1986
> Project: Hadoop
> Issue Type: New Feature
> Components: mapred
> Reporter: Tom White
> Assignee: Tom White
> Fix For: 0.16.0
>
> Attachments: hadoop-serializer-v2.tar.gz, SerializableWritable.java,
> serializer-v1.patch, serializer-v2.patch
>
>
> Currently Map Reduce programs have to use WritableComparable-Writable
> key-value pairs. While it's possible to write Writable wrappers for other
> serialization frameworks (such as Thrift), this is not very convenient: it
> would be nicer to be able to use arbitrary types directly, without explicit
> wrapping and unwrapping.
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