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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 Tue, 25 May 2010 01:20:24 GMT

    [ https://issues.apache.org/jira/browse/PIG-1426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12870937#action_12870937
] 

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

Alan, It won't affect  Zebra and BinStorage. Here I only apply VInt in tuple, and now we always
use VInt to write the size, we use VInt to read. It won't affect other data types.



> 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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