----- 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.

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