hadoop-pig-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1426) Change the size of Tuple from Int to VInt when Serialize Tuple
Date Thu, 27 May 2010 18:51:37 GMT

    [ https://issues.apache.org/jira/browse/PIG-1426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12872321#action_12872321
] 

Alan Gates commented on PIG-1426:
---------------------------------

It will affect Zebra and BinStorage, because it changes the Tuple.readFields() function, which
both of them use to decode the data.  

> 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. 

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message