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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4666) Disallow users to create file/dir named ".snapshot"
Date Mon, 15 Apr 2013 19:20:16 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13632057#comment-13632057
] 

Tsz Wo (Nicholas), SZE commented on HDFS-4666:
----------------------------------------------

We need to think carefully about automatic-rename since it may silently break symlink and
other applications.  Also, what if the target name is already used by other file/directory.
 It may be better to have it as a separated tool.  Or it may be good enough if we add a warning
in the release note.

I will throw an exception for the moment.  If we need automatic-rename, we could do it in
a separated jira.

                
> Disallow users to create file/dir named ".snapshot"
> ---------------------------------------------------
>
>                 Key: HDFS-4666
>                 URL: https://issues.apache.org/jira/browse/HDFS-4666
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, namenode
>            Reporter: Jing Zhao
>            Assignee: Tsz Wo (Nicholas), SZE
>         Attachments: h4666_20130413b.patch, h4666_20130413.patch, h4666_20130415.patch
>
>
> Currently ".snapshot" is reserved by snapshots as a special tag to specify the path leading
to snapshot copies. We should disallow users to create file/dir using name ".snapshot".

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