I agree with your general praise, BackupPC works very well for us in our 
environment, which is maybe half your size.  Due to your large size, I'll leave 
you with one thought:

One concern I've always had with backuppc is what would happen if i had a 
disaster and had to restore everything from backuppc.  

It would take absolutely forever to do this, because backuppc has to seek the 
disks so much (due to the effects of all those hard links).

I haven't done enough testing of this.  

We do send copies of our backuppc drives offsite.  I've always assumed that if 
i had to restore, the first thing I'd do would be duplicate the drives a couple 
times so I could do multiple restores in parallel.

On Sep 21, 2010, at 12:57 AM, Robin Lee Powell wrote:

> 
> We've got 3 machines with 3.2T, 4.2T, and 851G of backups, all
> gathered via rsync over ssh *across the network between distant data
> centers* (the backups are in a totally different location than the
> servers), each server with 150+ machines to backup every day... and
> it's actually working.
> 
> I wasn't sure if BackupPC was going to do OK in Real Production Use
> (tm); I'm really impressed.
> 
> Go you all.
> 
> -Robin
> 
> -- 
> http://singinst.org/ :  Our last, best hope for a fantastic future.
> Lojban (http://www.lojban.org/): The language in which "this parrot
> is dead" is "ti poi spitaki cu morsi", but "this sentence is false"
> is "na nei".   My personal page: http://www.digitalkingdom.org/rlp/
> 
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