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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13625) Document FileSystem actions that trigger update of modification time.
Date Mon, 26 Sep 2016 17:03:20 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15523612#comment-15523612
] 

Chris Nauroth commented on HADOOP-13625:
----------------------------------------

bq. Presumably rename(self, self) doesn' t update the modtime of the parent?

Yes, that is correct.  HDFS does not update mtime of the parent for a self-rename call.

> Document FileSystem actions that trigger update of modification time.
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-13625
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13625
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>            Reporter: Chris Nauroth
>
> Hadoop users and developers of Hadoop-compatible file systems have sometimes asked questions
about which file system actions trigger an update of the path's modification time.  This issue
proposes to document which actions do and do not update modification time, so that the information
is easy to find without reading HDFS code or manually testing individual cases.



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