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    copied!<p>The theoretical way of doing a backup safely is to use the <code>svnadmin hotcopy</code> command (<a href="http://svnbook.red-bean.com/nightly/en/svn.ref.svnadmin.c.hotcopy.html" rel="nofollow noreferrer">more details here</a>). It basically does a copy of one repository (not a <em>dump</em>, a <em>copy</em>), taking care to block all the operations during that time.</p> <p>This operation is quite fast, so I shouldn't think any client would have an error, they may experience some delay though (depending on the server load and so on).</p> <p>You can find an example of script on the <a href="http://svn.apache.org/repos/asf/subversion/trunk/tools/backup/hot-backup.py.in" rel="nofollow noreferrer">Apache subversion project website</a>.</p> <p>If you do a dump, besides the huge time it takes, you won't be sure it will done in an atomic way. Dumps are useful to </p> <ul> <li>make sure you can migrate from one version to the next - think long-term backups. For example if your server is upgraded from version 1.4 to 1.5, or to 1.6, it's interesting to make a dump then a load of your repositories to take full advantage of the improvements. In some more drastic upgrades it's a necessity because the repository format changes too much.</li> <li>filter files out, or merge repositories, those are more complex operations, out of topic here.</li> </ul> <p>Before opting for a dump, should you prefer that anyway, I encourage you to do the operation manually before, to make sure it is not too long. Make sure also to compress those files, which are much bigger than a repository (hotcopy) - the latter is very well compressed.</p>
 

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