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From "Julien Le Dem (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-2632) Create a SchemaTuple which generates efficient Tuples via code gen
Date Thu, 12 Apr 2012 17:17:20 GMT

    [ https://issues.apache.org/jira/browse/PIG-2632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13252609#comment-13252609
] 

Julien Le Dem commented on PIG-2632:
------------------------------------

@Jonathan: regarding bit manipulation in the patch, you might want to use java.util.BitSet
                
> Create a SchemaTuple which generates efficient Tuples via code gen
> ------------------------------------------------------------------
>
>                 Key: PIG-2632
>                 URL: https://issues.apache.org/jira/browse/PIG-2632
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Jonathan Coveney
>            Assignee: Jonathan Coveney
>             Fix For: 0.11
>
>         Attachments: PIG-2632-0.patch, PIG-2632-1.patch, PIG-2632-3.patch
>
>
> This work builds on Dmitriy's PrimitiveTuple work. The idea is that, knowing the Schema
on the frontend, we can code generate Tuples which can be used for fun and profit. In rudimentary
tests, the memory efficiency is 2-4x better, and it's ~15% smaller serialized (heavily heavily
depends on the data, though). Need to do get/set tests, but assuming that it's on par (or
even faster) than Tuple, the memory gain is huge.
> Need to clean up the code and add tests.
> Right now, it generates a SchemaTuple for every inputSchema and outputSchema given to
UDF's. The next step is to make a SchemaBag, where I think the serialization savings will
be really huge.

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