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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-432) support undelete, snapshots, or other mechanism to recover lost files
Date Sat, 09 Dec 2006 03:01:23 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-432?page=comments#action_12457043 ] 
Konstantin Shvachko commented on HADOOP-432:

- getDescendents(String src) {
        ArrayList strs = new ArrayList();
 type ArrayList<E> should be parameterized

- hadoop-default.xml
    = description for dfs.trash.trigger.size.pct should say something like
       "Triggers garbage collection of the expired items."
    = Typo emtries: should be entries

- I think we should have a junit test for the feature.
I'm sure you ran some programs to test the functionality.
It would be nice to combine them as a test module that would ensure that
future changes don't break the trash logic.

> 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: undelete12.patch, undelete16.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

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