+<h3><a name="Backing_up_your_Citadel_database"></a>Backing up your
+Citadel database</h3>
+<span style="font-weight: bold;">Please read this section carefully.</span><br>
+<br>
+There are two backup strategies you can use, depending on your site's
+availability requirements and disk space availability.<br>
+<h5>Strategy #1: Standard backup</h5>
+The standard (or "offline") backup is used when your Citadel server is
+configured to automatically delete committed database logs. The
+backup procedure is as follows:<br>
+<ol>
+ <li>Shut down the Citadel server.</li>
+ <li>Back up all files (database files, log files, etc.) to tape or
+some other backup media.</li>
+ <li>Start the Citadel server.</li>
+</ol>
+<span style="font-style: italic;">Advantage:</span> very little disk
+space is consumed by the logs.<br>
+<span style="font-style: italic;">Disadvantage:</span> Citadel is not
+available during backups.<br>
+<br>
+<h5>Strategy #2: "Hot" backup</h5>
+The "hot backup" procedure is used when your Citadel server is
+configured <span style="font-weight: bold;">not</span> to
+automatically delete committed database logs. The backup
+procedure is as follows:<br>
+<ol>
+ <li>Back up all files. Make sure the database files (<span
+ style="font-family: monospace;">cdb.*</span>) are backed up <span
+ style="font-style: italic;">before</span> the log files (<span
+ style="font-family: monospace;">log.*</span>). This will usually
+be the case, because the database files tend to appear first in both
+alphabetical and on-disk ordering of the <span
+ style="font-family: monospace;">data/</span> directory.</li>
+ <li>After verifying that your backup completed successfully, delete
+the committed log files with a command like this:</li>
+</ol>
+<span style="font-family: monospace;">/usr/local/citadel/sendcommand
+"CULL"</span><br>
+<br>
+<span style="font-style: italic;">Advantage:</span> Citadel continues
+to run normally during backups.<span style="font-style: italic;"><br>
+Disadvantage:</span> Much disk space is consumed by the log files,
+particularly if the full text indexer is turned on.<br>
+<br>
+<br>
+It is up to you to decide which backup strategy to use. <span
+ style="font-weight: bold;">Warning: if you configure Citadel to
+automatically delete committed database logs, and do not shut the
+Citadel service down during backups, there is no guarantee that your
+backups will be usable!</span><br>