lkml.org 
[lkml]   [2002]   [Feb]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: ext3 and undeletion
On Feb 26, 2002  10:00 -0800, H. Peter Anvin wrote:
> Rose, Billy wrote:
> > My company can tolerate 0% loss of data (which is why I raised this issue).
>
> There is no such thing as 0% loss of data. You can get some amount of
> security with backups, snapshots (really useful!) or undelete, but you
> can *NEVER* guarantee 0% loss of data... consider the case when a
> (l)user overwrites (not just deletes) a newly created file.

Snapshots at the filesystem level could handle the overwrite case.

However, even then it cannot be 0% loss of data, unless you have snapshots
for _every_ write of the file, which would quickly become prohibitive in
space usage (think autobackup from an editor on a large file). Sometimes
people just have to learn from their mistakes...

Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:24    [from the cache]
©2003-2011 Jasper Spaans. Advertise on this site