Am Sun, 24 Nov 2013 19:51:59 +0100
schrieb Hans Kraus <hans AT hanswkraus DOT com>:
> Am 24.11.2013 17:35, schrieb Arnold Krille:
> > Am Fri, 22 Nov 2013 09:07:45 -0500
> > schrieb Andy Stetzinger <andy.stetzinger AT riptidesoftware DOT com>:
> >
> >> Depends on what kind of NAS you're buying. If you're getting
> >> something that's a true linux OS, then yes. If not, then no.
> >>
> >> What I do here is run backuppc on a VM, and mount a network drive
> >> to the NAS. Works perfectly.
> >
> > So you only get backups when both the NAS and the main machine are
> > running. A way better solution would be to a) run backuppc directly
> > on the nas (if supported), b) run backuppc on the normal servers and
> > "just" write tapes to the NAS or c) build your own "NAS" with a
> > small machine with big disks and run minimal Linux+backuppc.
> >
> > - Arnold
> 
> But isn't that true in any case if the machine on which the backup
> storage is mounted and the main machine aren't the same one? I mean,
> in that case both computers must be up and running to get a backup,
> regardless where backuppc is really running.

When the NAS is mounted on the machine running backuppc, both devices
must be up to get _any_ backups. Thats two single-points of failure
in a row compared to one. (Of course the machines-to-be-backed-up have
to be up as well.)

When additionally the machine running backuppc is the main server (as
is in many one-server setups) you get funny effects: The main server
will fail to boot or at least take a very long time when the NAS is not
reachable, the NAS on the other hand is waiting on the dhcp-server of
the main-server to be active so it gets an IP and network
connectivity... In short: Don't do that. Run backuppc on a dedicated
(virtual or real) machine and give it all the disk-space it needs
without relying on external stuff. The backups are the most valuable
thing you (or your client) has.

Have fun,

Arnold

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