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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1502) Sqoop should run mysqldump in a mapper as opposed to a user-side process
Date Fri, 26 Feb 2010 15:33:27 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12838902#action_12838902
] 

Owen O'Malley commented on MAPREDUCE-1502:
------------------------------------------

I haven't looked at the patch, but you should be careful when pushing access to non-distributed
servers into the cluster. In particular, you probably want an upper bound on the number of
maps....

> Sqoop should run mysqldump in a mapper as opposed to a user-side process
> ------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1502
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1502
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: contrib/sqoop
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>         Attachments: MAPREDUCE-1502.patch
>
>
> Sqoop currently runs mysqldump ("direct import mode") in the local user process with
a single thread. Better system performance and reliability could be achieved by running this
in a parallel set of mapper tasks.

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