Hi Ana


> ​I don't think this will be a problem. I had this topology a few
> years ago with a standalone LTO drive. And it worked fine for a few GB
> being backed up in a few nightly hours.​

OK, sounds good. :-)

> ​I think you should do a few questions about your data.
> 
> 1) How important is my data?

Hmm, I will know when its gone...

> 2) For how long should I keep a backup of them? When they will be
> reclaimed? I need to keep them just for a total disaster recover​?
> They could be reclaimed from a year ago? From a week ago? From a month
> ago?
> 
> ​There are a lot of Bacula can do for you, but it is important to
> have this previous knowledge about your data.
> 
> It is clear that you will need a full backup​ of about 18 TB.  But
> will you need 1 full backup per month? 1 full backup per week?

Something like this is what I have in mind but I haven't a made plan 
yet.

I might want to run different strategies for backing up the main file 
server than for the clients.

For the clients probably only disaster recovery is needed, a Backup once 
a week would probably be sufficient. Backup of the clients is actually 
only necessary because users tend to store data locally and 
unfortunately as the file server is running OSX Server we do not have a 
domain controller anymore (as OS X switched vom Samba to SMBX). (Oh, and 
no, at the moment I cant get rid of the OS X on the server.)

On the file server things are a bit different. I need to be able to 
restore single files overwritten or deleted accidentally by users. And I 
want to keep daily differential backups for at least on or two weeks to 
be able to access different file versions.

> A simple solution could be having one full backup per month and daily
> differential. In this case, you will need to keep 2 full backups and
> about 30 daily differential.

Yes, something like this is what I have in mind. And from time to time 
I'd like to take a full backup to a remote location, just in case.

> Your full backups could be divided into smaller ones to fill in one
> tape.

Is this something that I would have to take care of? I guess Bracula can 
automatically span backups over multiple tapes.

> And you could run daily differential and full backups from
> different data. This way you could use a low cost storage array and
> your tape drive (which is your technology?).

I don't have the hardware yet. My plan is to get a small cheap server, 
some low cost CPU (some i3 Core), 6 TB HD (for spooling), a SAS 
controller and a LTO 5 or 6 drive (probably from Tandberg). I'll need to 
change tapes manually, any library solution seams to be to expensive. 
Changing tapes for the full backup will be bit annoying probably, and to 
do so I have to run it during the day, but this seams possible as there 
is not much going on on Fridays here.

Does any one know the book on Bacula from Philipp Storz? Is it useful to 
get started? I'm thinking about getting it.

See you
Flo





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