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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-708) Add TypedBytes SerDe for transform
Date Tue, 04 Aug 2009 20:36:14 GMT

     [ https://issues.apache.org/jira/browse/HIVE-708?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zheng Shao updated HIVE-708:
----------------------------

    Assignee: Namit Jain  (was: Zheng Shao)
     Summary: Add TypedBytes SerDe for transform  (was: for tranform,let the user specify
the serde)

> 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
>         Attachments: hive.708.1.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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