----- Original Message -----
> From: "Mark Phippard" <markphip_at_gmail.com>
> To: "amartin" <amartin_at_xes-inc.com>
> Cc: "users" <users_at_subversion.apache.org>
> Sent: Thursday, December 15, 2016 8:40:43 AM
> Subject: Re: Backup using ZFS Snapshots
> On Thu, Dec 15, 2016 at 9:25 AM, Andrew Martin <amartin_at_xes-inc.com> wrote:
>
>> > 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.
>>
>> It's tempting to just stop apache during the backup, but I need to
>> continue to
>> provide read-only access during the backup window, so apache needs to stay
>> on.
>>
>
> I was thinking of two approaches:
>
> 1. Have a "read-only" Apache httpd.conf that you swap into place and do a
> graceful restart and then swap back at end. This configuration would use
> some variant of these directives I took from the svnbook:
>
> # Authorization: Authenticated users only for non-read-only
> # (write) operations; allow anonymous reads
> <LimitExcept GET PROPFIND OPTIONS REPORT>
> Require valid-user
> </LimitExcept>
>
> You would use this concept, not this exact configuration. You would want
> basically be configuring the server to only allow read options.
>
>
> 2. The easier approach is the start-commit hook. Just have a single master
> hook-script that all repositories are symlinked to. Assuming you do not
> use this hook for anything else, you can just have it in place with content
> like:
>
> exit 0;
>
> Then when you are doing a backup you change it to something like:
>
> echo "Server is in read-only mode for backup. It should be available again
> within N minutes"
> exit 1;
>
> That said, based on the approach you are taking, I do not think you need to
> do any of this. Your ZFS snapshot of the filesystem can happen while a
> commit is happening since the ultimate backup will be done with an svnadmin
> hotcopy and that command will not care if the snapshot grabbed an
> in-progress commit.
>
Thanks for the clarification - those both seem like good approaches as well,
but like you said the ZFS snapshot + "svnadmin hotcopy" should be sufficient
for my particular use case.
Thanks again for the help!
Andrew
Received on 2016-12-15 16:19:21 CET