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https://issues.apache.org/jira/browse/HADOOP-4331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12643177#action_12643177
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Alexander Schwid commented on HADOOP-4331:
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You right, all work perfect with increased number of reduces and has the same
effect as using batch in one reduce.
So, i think this task is not nessesary.
> DBOutputFormat: add batch size support for JDBC and recieve DBWritable
> object in value not in key
> --------------------------------------------------------------------------------------------------
>
> Key: HADOOP-4331
> URL: https://issues.apache.org/jira/browse/HADOOP-4331
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Affects Versions: 0.20.0
> Reporter: Alexander Schwid
> Priority: Minor
> Fix For: 0.20.0
>
> Attachments: patch.txt
>
>
> package mapred.lib.db
> added batch size support for JDBC in DBOutputFormat
> recieve DBWritable object in value not in key in DBOutputFormat
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