On Tue, May 25, 2010 at 04:21:45PM +0200, Vincent Caron wrote:
> On Sun, 2010-05-23 at 15:55 +0200, Loic Dachary wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> > 
> > Hi,
> > 
> > I've setup a rsnapshot that will backup daily petzi.fsffrance.org, the
> > host on which lisa / bart are running. If it proves stable, it could
> > replace the current maggie backups. The main advantage is that the
> > actual system is backup instead of selected files. I've often found
> > difficult to restore backups that require to reconstruct a working
> > environment.
> 
>   I second that, when it's possible, it's much better to backup mostly
> blindly. I personnally backup whole domUs without transient data (log,
> tmp, etc) in order to restore them easily. It still needs a bit of
> intelligence (dump SQLs, manage those zillion noSQL thingies, etc) but
> it's simple and efficient.
> 
>   The rsync-based custom script on Maggie was initially meant to only
> capture what was essential user data because ressources (bandwidth and
> disk space) were a bit scarce. That's mainly not true nowadays (though a
> 4TB filer smoked last week and thus problems scale too...).

I agree too - saving 1-2GB of system data is not worth the trouble of
reinstalling it :)

On Savannah I switched to multiple backups (one per
vserver/chroot/xen/whatever) instead of a full global one.  This
allowed me to implement backups on LVM snapshots, guarantying
consistency.  It may be a good idea to do that too.

-- 
Sylvain

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