<div class="wiki-content maincontent"><p>In creating a backup, there may be an issue with the lock file, or with an inuse journal file. The lock file is not important but you would want the latest journal files. </p>

<ol><li>Freeze the filesystem containing the database to ensure that you get a consistent snapshot of the journal.</li><li>Back-up the database using any of the standard back-up mechanisms.</li></ol>


<p>Batch writes are serialised and followed by an fsync, so the fsfreeze will either block the next write or the next fsync. Either way is fine from a consistency point of view. The index is checkpointed to the journal periodically, so recovery of the index will at worst be from the last know good state.</p></div>