Re: RFC: Btrfs snapshots feature for F13

[Seth Vidal]

On Tue, 17 Nov 2009, James Antill wrote:

> On Tue, 2009-11-17 at 08:10 -0500, Josef Bacik wrote:
> > On Tue, Nov 17, 2009 at 2:48 AM, Jeff Garzik <jgarzik@xxxxxxxxx> wrote:
> > > As the URL notes under "Detailed Description," that is not handled at all.
> > >  It wraps all file I/O, yum or not, into the snapshot.
> >
> > Yeah but you can't roll back userland transactions.  Not to mention
> > you are talking about an interface that may change quite a bit over
> > the next year.
>
> That seems like a significant limitation, I'm also not sure that the
> current transaction API would be usable by rpm. Anyway...
>
> >   We have snapshotting abilities now, and yes it's a big
> > hammer, but just because its a bit of a blunt instrument doesn't mean
> > we shouldn't take advantage of it.
>
> This implies that "all you have is a hammer" but you can already run
> "yum history undo".

which works up to a point. If the older pkgs you had prior to an update 
are not available anywhere history undo isn't going to be able to 'undo' 
but so much.

-sv

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