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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3350) distcp should permit users to limit the number of maps
Date Fri, 16 May 2008 12:53:55 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12597458#action_12597458
] 

Hudson commented on HADOOP-3350:
--------------------------------

Integrated in Hadoop-trunk #493 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/493/])

> distcp should permit users to limit the number of maps
> ------------------------------------------------------
>
>                 Key: HADOOP-3350
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3350
>             Project: Hadoop Core
>          Issue Type: Improvement
>            Reporter: Chris Douglas
>            Assignee: Chris Douglas
>             Fix For: 0.18.0
>
>         Attachments: 3350-0.patch, 3350-1.patch
>
>
> distcp provides no user-configurable setting to affect the number of maps run during
a copy. For large clusters, the current calculation- min(#bytes / 256MB, #nodes * 20)- can
be overly aggressive.

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