You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@hive.apache.org by "Zheng Shao (JIRA)" <ji...@apache.org> on 2009/08/04 22:17:14 UTC
[jira] Assigned: (HIVE-708) for tranform,let the user specify the
serde
[ https://issues.apache.org/jira/browse/HIVE-708?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zheng Shao reassigned HIVE-708:
-------------------------------
Assignee: Zheng Shao (was: Namit Jain)
> for tranform,let the user specify the serde
> -------------------------------------------
>
> 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: Zheng Shao
> 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/
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.