Shadow filesystems [was Re: Pair donates 20,000 to Poul-Henning Kamp??]

[Kris Kennaway]

On Thu, Apr 15, 2004 at 09:53:09PM +0930, Daniel O'Connor wrote:
> On Thu, 15 Apr 2004 16:31, Matthew Seaman wrote:
> > On Wed, Apr 14, 2004 at 10:43:47PM -0400, Darren Henderson wrote:
> > > They have some "shadow drive" functionality that I would love to see
> > > folded back into FreeBSD.
> >
> > Hmmm... that's a coincidence.  Is this the same sort of thing as the
> > 'Shadow Drive' function under Windows 2003?  That is, a system that
> > keeps backup copies of files etc. over time, so if you happen to
> > accidentally delete something you shouldn't have, you can resurrect it
> > without having to go running to your Sys-admin to beg them to get it
> > back from the backup tapes.  Sounds conceptually like a slightly more
> > elaborate version the old VMS file versioning thing, or the GNU
> > numbered backup trick you can do with emacs etc.
> 
> mksnap_ffs? :)
> (Plus some helper stuff..)

I once played around with a cron job that rotated a set of snapshots,
but there were problems with deadlocking and I didnt have time to
report the bugs properly to Kirk.  This would be a great project for
someone to work on (reporting the bugs in snapshots, that is ;).

Kris

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