On Nov 24, 2014, at 12:51 PM, Gordon Messmer <gordon.mess...@gmail.com> wrote:
> 
> On 11/24/2014 09:35 AM, Jason A. Kates wrote:
>> I have been using pre and post jobs to take care of the LVM snapshots/mounts 
>> for the backups within Bacula.   Would you really need to extend Bacula to 
>> make this work?
> 
> Yes, for a number of reasons.
> 
> First, and most importantly, there is no standard mechanism for making a 
> system snapshot, which leaves every administrator to write their own.  
> Re-inventing the wheel is not an effective use of time, and I've seen a 
> lot of bad scripts.  That's inevitable when they are written and 
> re-written for each system.  I'm working on a standard mechanism for 
> backup snapshots so we can get past all that.
> 
> Second, the protocol used by the snapshot mechanism is designed to use 
> an external process whose only job is to make the snapshots and wait for 
> a file descriptor (stdin) to close before cleaning up. That means that 
> if the bacula-fd crashes, the snapshots won't be left sitting around 
> waiting for a post job that will never fire off.
> 
> The snapshot system is modular, and will support a variety of 
> filesystems in addition to EXT on LVM.  btrfs, Gluster, and NetApp NFS 
> should be committed shortly.

What about ZFS?

I do as Jason mentioned: I use pre and post jobs to take snapshots.

I’ll be interested in reading the user documentation for this.

At present, I have a job which snapshots about 34 filesystems and backs them 
all up.  I’m hoping your interface does similar.

— 
Dan Langille
http://langille.org/






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