aufs based upgrade tests

[Alexander Sack]

On Wed, Mar 18, 2009 at 09:18:50AM +0100, Michael Vogt wrote:
> On Tue, Mar 17, 2009 at 03:53:23PM +0200, Marius Gedminas wrote:
> > On Mon, Mar 16, 2009 at 07:00:12PM +0100, Michael Vogt wrote:
> > > Yes, after the upgrade the system will be jaunty until the next
> > > reboot, then the writable overlay is removed and the system is exactly
> > > in the same state as before the upgrade.
> > 
> > Does this overlay cover the whole filesystem?  If people start creating
> > files in /home that are going to be lost on reboot, it would be nice to
> > warn them about that.
> [..]
> 
> The /home dir is excluded from the overlay. There is still a certain
> risk with this however, assume hypothetical e.g. the new rhythmbox is
> run after the test upgrade and it converts its database files to a new
> format that the old (intrepid) version can no longer read. This is
> pretty rare, but it does sometimes happens.

Is there any reason why we don't overlay /home? Just so that you can
test upgrade for existing configs?

 - Alexander