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From "Jeff Zhang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1426) Change the size of Tuple from Int to VInt when Serialize Tuple
Date Fri, 28 May 2010 01:34:36 GMT

    [ https://issues.apache.org/jira/browse/PIG-1426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12872758#action_12872758
] 

Jeff Zhang commented on PIG-1426:
---------------------------------

Alan, I look at your comments again. seems you are considering the same problem. In the case,
I'd like to introduce another type of Tuple and TupleFactory to keep the incompatibility.
The zebra still use the Int type tuple, and the pig core use the VInt type tuple. What do
you think ? 

> Change the size of Tuple from Int to VInt when Serialize Tuple
> --------------------------------------------------------------
>
>                 Key: PIG-1426
>                 URL: https://issues.apache.org/jira/browse/PIG-1426
>             Project: Pig
>          Issue Type: Improvement
>          Components: data
>    Affects Versions: 0.8.0
>            Reporter: Jeff Zhang
>            Assignee: Jeff Zhang
>             Fix For: 0.8.0
>
>         Attachments: PIG_1426.patch
>
>
> Most of  time,  the size of tuple is not very large, one byte is enough for store the
size of tuple. So I suggest to use VInt instead of Int for the size of tuple when doing Serialization.
Because the key type of map output is Tuple, so this can reduce the amount of data transferred
from mapper to reducer. 

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