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From Arkady Borkovsky <ark...@yahoo-inc.com>
Subject Re: [jira] Created: (HADOOP-432) support undelete, snapshots, or other mechanism to recover lost files
Date Fri, 11 Aug 2006 05:01:16 GMT
+1 on undelete.  Move the deleted files into a special place and start 
actually deleting them when the disk space is low.  If the space gets 
low only on few nodes, and the load is not high, the blocks from 
deleted files may be re-replicated to other nodes, -- or the 
replication factor of deleted files may be decreased.

Snapshot seems an orthogonal functionality with a whole bunch of 
independent requruirements
On Aug 8, 2006, at 10:18 AM, Yoram Arnon (JIRA) wrote:

> 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
>             Reporter: Yoram Arnon
> 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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