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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7473) TestDU is too sensitive to underlying filesystem
Date Mon, 18 Jul 2011 21:36:58 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13067318#comment-13067318
] 

Owen O'Malley commented on HADOOP-7473:
---------------------------------------

We could fix this by changing the command to use: "du -ks --apparent-size <file>", which
causes it to return the part of the allocation that is actually used. That however, isn't
available on non-gnu systems.

I'd propose instead that we just loosen the TestDU test to require that the size be between:

size <= returned size < size + 10%
 



> TestDU is too sensitive to underlying filesystem
> ------------------------------------------------
>
>                 Key: HADOOP-7473
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7473
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Owen O'Malley
>
> DU currently uses "du -ks <path>" to determine the size. The returned number can
be substantially more than the apparent size of the file, which causes the TestDU to fail.

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