[jira] Updated: (HADOOP-432) support undelete, snapshots, or other mechanism to recover lost files

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[jira] Updated: (HADOOP-432) support undelete, snapshots, or other mechanism to recover lost files

Tim Allison (Jira)
     [ http://issues.apache.org/jira/browse/HADOOP-432?page=all ]

Wendy Chien updated HADOOP-432:
-------------------------------

    Attachment: undelete12.patch

This latest patch fixes a few bugs, including the one dhruba mentioned.  

1. when restoring a deleted item, create the directories in the path if they no longer exist.
2. handle deleting and undeleting directories correctly when the destination directory already exists (and contains files or subdirectories).
3. check operation (rename or delete) succeeded before making changes to the bookkeeping data structure.

> 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, undelete12.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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