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https://issues.apache.org/jira/browse/HIVE-708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12747755#action_12747755
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Zheng Shao commented on HIVE-708:
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The new test failed somehow. I had to revert the new test for now.
> Add TypedBytes SerDe for transform
> ----------------------------------
>
> Key: HIVE-708
> URL: https://issues.apache.org/jira/browse/HIVE-708
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Serializers/Deserializers
> Reporter: Namit Jain
> Assignee: Namit Jain
> Fix For: 0.5.0
>
> Attachments: hive.708.1.patch, hive.708.2.patch, hive.708.3.patch,
> hive.708.4.patch
>
>
> Currently, LazySimpleSerDe is used to send data to the user transformation
> functions - it would be useful to let the user specify the format of the data.
> Specifically, it would be very easy and useful to accommodate:
> (cut and paste from Venky's mail)
> Here's the typedbytes stuff that Dumbo uses.
> http://issues.apache.org/jira/browse/HADOOP-1722
> From:
> http://static.last.fm/johan/huguk-20090414/klaas-hadoop-1722.pdf
> Timings for IP count program on 300gigs of weblogs:
> Java: 8 minutes
> Dumbo with typed bytes: 10 minutes
> Hive: 13 minutes
> Dumbo without typed bytes: 16 minutes
> They also have a fast python decoder for this, which is apparently 25% faster
> than the python version.
> http://github.com/klbostee/ctypedbytes/tree/master
> http://dumbotics.com/2009/05/31/dumbo-on-clouderas-distribution/
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