On 09/02/16 15:31, Mickey Feldman wrote:
The wiki is now about 10 GB. It does compress to about 1 GB. Although text pages are saved as their differences,
Not exactly. Only if you run a maintenance script, which you probably haven't.
as far as I know new versions of images are saved in their entirety.
Right
I want to do a daily off-site backup. This wiki is on a shared virtual host without command line access, thus no ability to use rsync over ssh, which would allow only the changes to be moved. An entire image of the system needs to be saved so that it can be restored fairly painlessly. I want to shrink this as much as possible, since I am already running into problems with the archiving of the system on the host due to size. For example, I have had to compress each branch of the images folder individually - gzipping it into a single archive fails, despite the hosting company having bumped timeouts and memory allowances. Moving to a host with complete command line access might be a solution, but currently the hosting company deals with security issues (beyond allowing only authorized users to log in of course). If we go to something like rackspace, then security becomes our problem, and I don't pretend to have sufficient expertise in that. Suggestions and alternatives welcome.
If you are at the point of wanting to remove old revisions in order to have a small backup size, you could as well filter it to only include new revisions.
Seems like the wrong solution, though. I don't think the size of your old revisions will be significative in the whole backup size.
I would check if rsync binary is installed, even if you don't have command line access. You could have a cron (or launch from a web page… if there's no other way) the rsync that copies the changes to the other site. Just note that should your main site be compromised, you do not want your backup to be deleted through that path. Not that different from ensuring that if your files were corrupted (on purpose?) your backup won't be copying those changes before you notice, though.
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