Pushing hard-linked backups
matt at mattmccutchen.net
Mon Dec 24 21:22:35 GMT 2007
On Wed, 2007-11-21 at 14:55 -0500, Eric S. Johansson wrote:
> Matt McCutchen wrote:
> > On Sun, 2007-11-18 at 17:45 -0500, Eric S. Johansson wrote:
> >> Using some of the techniques you show here, it would be possible to trigger the
> >> backup process and push the data from the laptop.
> > Yes, push backups can be done quite elegantly by pushing the new data to
> > a directory and triggering the backup software to pick it up from there
> > with an --rsync-path or post-xfer exec script. I helped a user set up a
> > push-backup system before (it used rsnapshot and an rsync daemon) and
> > would be happy to help you set one up if you need it.
> I would appreciate that. Let's try and document the process so that others can
> benefit from our experience.
OK. The essential idea is that the laptop pushes its data to a
directory on the backup machine and then triggers the backup machine to
incorporate the data into a hard-linked backup, but you have lots of
flexibility in how to implement this. If you give me some more
information about your requirements, I can suggest an appropriate setup.
- Are you backing up just your own laptop, or should the setup
accommodate multiple machines?
- Is it a priority to keep the client script simple?
- Does the backup server need to be robust against malicious clients?
- Should the data be encrypted as it passes over the network?
The important decisions are whether to use ssh, a daemon, or some
combination thereof; how to manage the hard-linked backups (I recommend
rsnapshot); and what (if any) security measures to put in place on the
More information about the rsync