<html>
<head>
<META http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>How To Use Defragmentation</title>
<link rel="stylesheet" type="text/css" href="../../../../style.css">
</head>
<body>
<div class="CommonContent">
<div class="CommonContentArea">
<h1>How To Use Defragmentation</h1>
<p>The simplest way to defragment a db4o file would be:</p>
<span name="cs_wiki_filter" csw_filters="net">
<p>.NET: </p>
<p><code>Defragment.defrag("filename")</code></p>
</span>
<p>The file must not be opened by another process during
defragmentation!</p>
<p>This will move the file <i>filename </i>to <i>filename.backup</i>,
then create a defragmented version of this file in the original position. If
the backup file already exists, this will throw an IOException and no action
will be taken.</p>
<p>You can also specify the backup filename manually:</p>
<span name="cs_wiki_filter" csw_filters="net">
<p>.NET: </p>
<p><code>Defragment.Defrag(filename, backupfile);</code></p>
</span>
<p>For more detailed configuration of the defragmentation
process, you can use a <a href="defragmentation_configuration.html" class="wikiLink">DefragmentConfig</a>
instance within the following methods:</p>
<span name="cs_wiki_filter" csw_filters="net">
<p>.NET: </p>
<p><code>Defragment.Defrag(configuration);</code></p>
<p><code>Defragment.Defrag(configuration, listener);</code></p>
</span>
<p>You can use listener parameter to track problems during defragmentation process. For more
information see <a href="tracking_defragmentation_errors.html" class="wikiLink">Tracking Defragmentation Errors</a>.</p>
<p>Defragmentation can throw IOException in the following
situations:</p>
<ul><li>backup file exists</li><li>database file not found</li><li>database file is opened by another process</li></ul></div>
</div>
<div id="footer">
This revision (2) was last Modified 2007-04-01T09:38:30 by Tetyana.
</div>
</body>
</html>
