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https://issues.apache.org/jira/browse/HADOOP-1986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12534132
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Tom White commented on HADOOP-1986:
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> Do I worry too much?
I don't think so - I was actually worrying about the cost of introspection too.
I think it'll be OK - as Owen says, the serializer will be cached - but I think
we should do some benchmarking before any code is accepted.
Speaking of code, I hope to have something to show fairly soon, and I hope it
will help focus on the issues that we're not sure we're agreeing on :)
> 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: SerializableWritable.java
>
>
> 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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