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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3873) DistCp should have an option for limiting the number of files/bytes being copied
Date Wed, 13 Aug 2008 18:24:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12622308#action_12622308
] 

Tsz Wo (Nicholas), SZE commented on HADOOP-3873:
------------------------------------------------

The javadoc warnings are nothing to do with the patch.  Before I did "svn update" today, there
were no javadoc warnings.  See HADOOP-3949

The tests failed are TestMapRed and TestMiniMRDFSSort but they failed on trunk (they did not
fail before I did "svn update").  See HADOOP-3950

> DistCp should have an option for limiting the number of files/bytes being copied
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-3873
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3873
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: tools/distcp
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>         Attachments: 3873_20080808b.patch, 3873_20080811b.patch
>
>
> A single DistCp command may potentially copies a huge number of files/bytes.  In such
case, DistCp will run a long time and there is no way stop it nicely.  It would be good if
DistCp have an option to limit the number of files/bytes being copied.  Once the limit is
reached, DistCp will terminate and return success.  All files copied are guaranteed to be
good and there is no partially copied file.

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