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/
This archive was generated by hypermail 2b29 : Thu Feb 28 2002 - 21:00:30 EST