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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-432) support undelete, snapshots, or other mechanism to recover lost files
Date Wed, 29 Nov 2006 07:27:22 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-432?page=comments#action_12454242 ] 
            
dhruba borthakur commented on HADOOP-432:
-----------------------------------------

I have two questions:

1. The trash directory is hardcoded to /trash. Does it make sense to introduce yet another
config variable dfs.thrash.dir to allow the administrator to set the trash directory?

2. The code allows undeleting a file. The act of "undeleting" moves the file from /trash to
its original location. Suppose I had a file named /user/dhruba/input/file.txt; I deleted it
and it moved to /trash/user/dhruba/input/file.txt. Now I deleted the directory /user/dhruba/input.
Then I tried to undelete the above file. Will the "/user/dhruba/input" directory get recreated
in the process? ( An alternative would be to not have the "undelete" but an user can browse
the /trash directory and copy files from /trash to anywhere else in his namespace).



> support undelete, snapshots, or other mechanism to recover lost files
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-432
>                 URL: http://issues.apache.org/jira/browse/HADOOP-432
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: dfs
>            Reporter: Yoram Arnon
>         Assigned To: Wendy Chien
>         Attachments: undelete.patch, undelete11.patch
>
>
> currently, once you delete a file it's gone forever.
> most file systems allow some form of recovery of deleted files.
> a simple solution would be an 'undelete' command.
> a more comprehensive solution would include snapshots, manual and automatic, with scheduling
options.

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