Re: Backup script

[Ralf Mardorf <ralf.mardorf@alice-dsl.net>]

On Thu, 2011-06-02 at 14:23 -0400, shawn wilson wrote:
> 
> On Jun 2, 2011 1:48 PM, "Ralf Mardorf" <ralf.mardorf@alice-dsl.net>
> wrote:
> >
> > On Thu, 2011-06-02 at 13:21 -0400, shawn wilson wrote:
> > >
> > > On Jun 2, 2011 1:06 PM, "Ralf Mardorf"
> <ralf.mardorf@alice-dsl.net>
> > > wrote:
> > > >
> > > > On Thu, 2011-06-02 at 14:01 +0100, Tom Furie wrote:
> > > > > On Thu, Jun 02, 2011 at 04:24:52AM +0200, Ralf Mardorf wrote:
> > > > >
> > > > > > It takes just some minutes to restore a complete install
> from an
> > > > > > archive, IMO it makes no sense to make a deafult install and
> > > then to
> > > > > > copy back configs and data and to install additional stuff.
> And
> > > what
> > > > > > is
> > > > >
> > > > > Fair enough. Whatever works, works. :)
> > > > >
> > > > > > Btw. at the moment I can't install libslv2-dev, because
> there's
> > > a
> > > > > > dependency missing for Debian stable?!  If I should e.g.
> solve
> > > this
> > > > > > issue, I won't have to do this again, when a backup is
> needed.
> > > > >
> > > > > I had no trouble installing libslv2-dev on any of my squeeze
> > > systems.
> > > > > Possibly a conflict from another repository?
> > > >
> > > > Yep, I need to do a fresh Debian testing install. I started with
> > > Debian
> > > > stable and now I know that I need testing, but I guess I've got
> an
> > > > uncertain mix of stable and testing.
> > > >
> > >
> > > You can use packages from both (IIRC its a setting in apt.conf).
> What
> > > I'd suggest is to have a test (sandbox) type box (preferably a vm
> > > where you can revert to a snapshot) and make your own repository
> from
> > > that that your production hosts use.
> > >
> > >
> >
> > chroot might be an option, but this could cause a lot of unneeded
> issues
> > and I guess a virtual machine can't be used, at least I don't know
> how
> > to ensure that this emulates the real behaviour, when using
> professional
> > audio cards etc.. If there e.g. is jitter, is it caused by the
> > visualisation or is it regarding to the real hardware and drivers?
> > For a DAW you're dealing with HPET, timer resolution is 1000000000
> Hz,
> > expected jitter for e.g. hw MIDI is far below a millisecond.
> >
> 
> I wasn't talking about configuring your software much on the vm. Just
> using the vm to make sure everything you need will install correctly
> and staging packages to update your production boxes from. This way,
> you know when there's an issue between stable and testing packages
> ahead of time. Then you point your production box to your local repo
> of known good packages and let them update from that. 
> 
> This is sorta out of the realm of 'backup'. But sense you mentioned
> needing to figure what stable vs testing packages you have, I just
> figured is throw out what I'd do (its ten minutes more effort and will
> save tons of headache down the road).

Ok, now I do understand :)