aufs based upgrade tests

Oliver Grawert ogra at
Fri Mar 20 09:49:09 UTC 2009

Am Freitag, den 20.03.2009, 09:49 +0200 schrieb Lars Wirzenius:
> to, 2009-03-19 kello 16:20 +0100, Martin Soto kirjoitti:
> > Seconded, you start your session once with the new version installed,
> > and there's often no way back. Applications will surely update their
> > configuration data as soon as they're started, and there's no guarantee
> > that they'll work when the older system is reinstated.
> In my humble opinion, such applications are broken. They will already
> break when, for example, $HOME is shared over NFS, and different hosts
> are not completely in sync, version-wise.
> > As a possible solution, what about putting user accounts under aufs as
> > well? This would have the advantage of allowing for testing how
> > applications update their configuration data, which is also a good idea
> > because this is a common source of bugs.
> This seems like a good idea, so I second it, because applications often
> are broken. It might be good to optionally allow /home to be excluded.
how about just adding a test user in the overlay that gets removed with the
aufs and have the option that application settings can be taken over from
an existing user for this account ?


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