<!--$Id: disk.so,v 11.15 2000/12/21 18:37:09 bostic Exp $--> <!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.--> <!--All rights reserved.--> <html> <head> <title>Berkeley DB Reference Guide: Release 3.0: upgrade requirements</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++"> </head> <body bgcolor=white> <table><tr valign=top> <td><h3><dl><dt>Berkeley DB Reference Guide:<dd>Upgrading Berkeley DB Applications</dl></h3></td> <td width="1%"><a href="../../ref/upgrade.3.0/java.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/upgrade.3.1/intro.html"><img src="../../images/next.gif" alt="Next"></a> </td></tr></table> <p> <h1 align=center>Release 3.0: upgrade requirements</h1> <p>Log file formats and the Btree, Recno and Hash Access Method database formats changed in the Berkeley DB 3.0 release. (The on-disk Btree/Recno format changed from version 6 to version 7. The on-disk Hash format changed from version 5 to version 6.) Until the underlying databases are upgraded, the <a href="../../api_c/db_open.html">DB->open</a> function will return a <a href="../../api_c/db_open.html#DB_OLD_VERSION">DB_OLD_VERSION</a> error. <p>For further information on upgrading Berkeley DB installations, see <a href="../../ref/upgrade/process.html">Upgrading Berkeley DB installations</a>. <table><tr><td><br></td><td width="1%"><a href="../../ref/upgrade.3.0/java.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/upgrade.3.1/intro.html"><img src="../../images/next.gif" alt="Next"></a> </td></tr></table> <p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font> </body> </html>