Oops; forgot to reply all...
I set up, for my web server, after a pretty disastrous outage a couple
months ago, a bacula system where, from home, I have a mac laptop open up a
vpn tunnel to the server, and then use that tunnel to back up the entire
server. Not as big a job as it sounds, as it's pretty small time, but, the
tunnel works very well for me. Matter of fact, given the way I have things
set up at home, between firewalls and other fun things, tunneling (either by
ssh or by vpn) was the only way I had to be able to get my backups easily.
My setup is exceptionally bush league, at the moment:
Virtual private server running vpn and bacula-fd
mac laptop (old g3 pismo) running vpn client and bacula-dir/sd/fd
External USB hard drive (20G).
That said, it works, and it works well, even with that low level of
equipment. Every night, I get an incremental backup., and I am comfortable
that I can, even if something happened to my fruitbook, take the hard drive
and recover my data at any time. The initial backup was a couple of gigs;
after that, a couple of megs a night comes across. At this point, I'm now
even considering offering that solution to some folks in my neighborhood who
worry about data loss, too. Eventually, upgrading it to a solution for
schools, etc. in the area seems like a really good idea. The really nice
thing being, once you set it up right, you pretty well can just let it run
and let it notify you of problems that you'll need to fix.
Put a real server-class system together, on a network with real bandwidth,
and you have an exceptionally powerful system.
The inital backup is going to suck up a lot of time and bandwidth. I'd
recommend, while you're doing your planning, that you back up in groups, to
get things started. I.e. get all your local users, first. Then, once their
full backup is done, start the remote users, etc. I suspect, if you're going
to be dealing with that many, you might even break it down into sectors
(local accounting, local graphics guys, local web guys, etc.).
If you're going to be tweaking the user filesets a lot, initially, I'd make
a suggestion. I recently learned about the IgnoreFilesetChanges notion,
which might come in really handy for you as you tweak different users'
backup filesets - that way, you don't automatically perform a full backup
every time you tweak (you can still perform that, if you want, but it isn't
automatic).
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