On Tue, Dec 13, 2016 at 4:44 PM, Andrew Martin <amar...@xes-inc.com> wrote:
> ----- Original Message ----- > > From: "Stefan Sperling" <s...@elego.de> > > To: "amartin" <amar...@xes-inc.com> > > Cc: "users" <users@subversion.apache.org> > > Sent: Tuesday, December 13, 2016 3:29:50 PM > > Subject: Re: Backup using ZFS Snapshots > > > On Tue, Dec 13, 2016 at 03:17:53PM -0600, Andrew Martin wrote: > >> Hello, > >> > >> I am running a Subversion 1.9.3 server on Ubuntu 16.04. I currently use > >> svnadmin hotcopy to safely backup the SVN repositories, but since the > >> repositories are now hosted on a ZFS dataset, I would like to utilize > ZFS's > >> snapshot capabilities to create atomic, point-in-time backups of the > >> repositories. My plan to do this is as follows: > >> > >> 1. create zfs snapshot > >> 2. clone zfs snapshot and mount at a temporary location > >> 3. run svnadmin hotcopy from the mounted clone to safely create a backup > >> 4. umount and destroy clone > >> > >> My only concern is if a commit is in-progress when the zfs snapshot > occurs, > >> would svnadmin hotcopy still be able to safely handle creating the > backup? > >> > >> Is this a safe procedure for creating backups? > > > > You don't need to hotcopy at all if you have filesystem snapshots. > > Check out 'svnadmin freeze'. It was made for this use case. > > Thanks for the quick reply - 'svnadmin freeze' looks useful for this > purpose. > > Is there a way to freeze the repository with a command and then unfreeze it > with another command? I'd ideally like to run several commands on different > servers while the repository is frozen. > If you can use freeze it is a good solution but it is one repository at a time. The svnbook gives a good example using rsync and freeze to do backups: http://svnbook.red-bean.com/en/1.8/svn.ref.svnadmin.c.freeze.html If all of your activity happens via Apache there might be easier ways to make all your repositories read only during a backup window and you can also always use the start-commit hook as an easy way to make repositories read only. -- Thanks Mark Phippard http://markphip.blogspot.com/
