1<!--$Id: disk.so,v 11.15 2000/12/21 18:37:09 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 3.0: 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.3.0/java.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../upgrade.3.1/intro.html"><img src="../../images/next.gif" alt="Next"></a> 14</td></tr></table> 15<p align=center><b>Release 3.0: upgrade requirements</b></p> 16<p>Log file formats and the Btree, Recno and Hash Access Method database 17formats changed in the Berkeley DB 3.0 release. (The on-disk Btree/Recno 18format changed from version 6 to version 7. The on-disk Hash format 19changed from version 5 to version 6.) Until the underlying databases 20are upgraded, the <a href="../../api_c/db_open.html">DB->open</a> method will return a <a href="../../api_c/db_open.html#DB_OLD_VERSION">DB_OLD_VERSION</a> 21error.</p> 22<p>For further information on upgrading Berkeley DB installations, see 23<a href="../../ref/upgrade/process.html">Upgrading Berkeley DB 24installations</a>.</p> 25<table width="100%"><tr><td><br></td><td align=right><a href="../upgrade.3.0/java.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../upgrade.3.1/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