<!--$Id: asr.so,v 1.3 2006/08/24 16:32:32 bostic Exp $--> <!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <html> <head> <title>Berkeley DB Reference Guide: Release 4.0: application-specific recovery</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> </head> <body bgcolor=white> <table width="100%"><tr valign=top> <td><b><dl><dt>Berkeley DB Reference Guide:<dd>Upgrading Berkeley DB Applications</dl></b></td> <td align=right><a href="../upgrade.4.0/cxx.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../upgrade.4.0/disk.html"><img src="../../images/next.gif" alt="Next"></a> </td></tr></table> <p align=center><b>Release 4.0: application-specific recovery</b></p> <p>If you have created your own logging and recovery routines, you may need to upgrade them to the Berkeley DB 4.0 release.</p> <p>First, you should regenerate your logging, print, read and the other automatically generated routines, using the dist/gen_rec.awk tool included in the Berkeley DB distribution.</p> <p>Next, compare the template file code generated by the gen_rec.awk tool against the code generated by the last release in which you built a template file. Any changes in the templates should be incorporated into the recovery routines you have written.</p> <p>Third, if your recovery functions refer to <a href="../../api_c/env_set_app_dispatch.html#DB_TXN_FORWARD_ROLL">DB_TXN_FORWARD_ROLL</a> (that is, your code checks for that particular operation code), you should replace it with DB_REDO(op) which compares the operation code to both <a href="../../api_c/env_set_app_dispatch.html#DB_TXN_FORWARD_ROLL">DB_TXN_FORWARD_ROLL</a> and <a href="../../api_c/env_set_app_dispatch.html#DB_TXN_APPLY">DB_TXN_APPLY</a>. (<a href="../../api_c/env_set_app_dispatch.html#DB_TXN_APPLY">DB_TXN_APPLY</a> is a potential value for the operation code as of the 4.0 release.)</p> <p>Finally, if you have created your own logging and recovery routines, we recommend you contact us and ask us to review those routines for you.</p> <table width="100%"><tr><td><br></td><td align=right><a href="../upgrade.4.0/cxx.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../upgrade.4.0/disk.html"><img src="../../images/next.gif" alt="Next"></a> </td></tr></table> <p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> </body> </html>