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    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/

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