1<!--$Id: disk.so,v 1.8 2007/06/14 18:31:18 bostic Exp $-->
2<!--Copyright (c) 1997,2008 Oracle.  All rights reserved.-->
3<!--See the file LICENSE for redistribution information.-->
4<html>
5<head>
6<title>Berkeley DB Reference Guide: Release 4.1: upgrade requirements</title>
7<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
8<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++">
9</head>
10<body bgcolor=white>
11<table width="100%"><tr valign=top>
12<td><b><dl><dt>Berkeley DB Reference Guide:<dd>Upgrading Berkeley DB Applications</dl></b></td>
13<td align=right><a href="/upgrade.4.1/app_dispatch.html"><img src="/images/prev.gif" alt="Prev"></a><a href="/toc.html"><img src="/images/ref.gif" alt="Ref"></a><a href="/upgrade.4.2/intro.html"><img src="/images/next.gif" alt="Next"></a>
14</td></tr></table>
15<p align=center><b>Release 4.1: upgrade requirements</b></p>
16<p>The log file format changed in the Berkeley DB 4.1 release.</p>
17<p>All of the access method database formats changed in the Berkeley DB 4.1
18release (Btree/Recno: version 8 to version 9, Hash: version 7 to version
198, and Queue: version 3 to version 4).  <b>The format changes are
20entirely backward-compatible, and no database upgrades are needed.</b>
21Note that databases created using the 4.1 release may not be usable with
22earlier Berkeley DB releases.</p>
23<p>For further information on upgrading Berkeley DB installations, see
24<a href="/ref/upgrade/process.html">Upgrading Berkeley DB installations</a>.</p>
25<table width="100%"><tr><td><br></td><td align=right><a href="/upgrade.4.1/app_dispatch.html"><img src="/images/prev.gif" alt="Prev"></a><a href="/toc.html"><img src="/images/ref.gif" alt="Ref"></a><a href="/upgrade.4.2/intro.html"><img src="/images/next.gif" alt="Next"></a>
26</td></tr></table>
27<p><font size=1>Copyright (c) 1996,2008 Oracle.  All rights reserved.</font>
28</body>
29</html>
30