Edit File: set_flags.html
<!--$Id: set_flags.so,v 1.3 2003/10/18 19:16:16 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 3.2: DB_ENV->set_flags</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.3.2/intro.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../upgrade.3.2/callback.html"><img src="../../images/next.gif" alt="Next"></a> </td></tr></table> <p align=center><b>Release 3.2: DB_ENV->set_flags</b></p> <p>A new method has been added to the Berkeley DB environment handle, <a href="../../api_c/env_set_flags.html">DB_ENV->set_flags</a>. This method currently takes three flags: <a href="../../api_c/env_set_flags.html#DB_CDB_ALLDB">DB_CDB_ALLDB</a>, <a href="../../api_c/env_set_flags.html#DB_NOMMAP">DB_NOMMAP</a> and <a href="../../api_c/env_set_flags.html#DB_TXN_NOSYNC">DB_TXN_NOSYNC</a>. The first of these flags, <a href="../../api_c/env_set_flags.html#DB_CDB_ALLDB">DB_CDB_ALLDB</a>, provides new functionality, allowing Berkeley DB Concurrent Data Store applications to do locking across multiple databases.</p> <p>The other two flags, <a href="../../api_c/env_set_flags.html#DB_NOMMAP">DB_NOMMAP</a> and <a href="../../api_c/env_set_flags.html#DB_TXN_NOSYNC">DB_TXN_NOSYNC</a>, were specified to the <a href="../../api_c/env_open.html">DB_ENV->open</a> method in previous releases. In the 3.2 release, they have been moved to the <a href="../../api_c/env_set_flags.html">DB_ENV->set_flags</a> method because this allows the database environment's value to be toggled during the life of the application as well as because it is a more appropriate place for them. Applications specifying either the <a href="../../api_c/env_set_flags.html#DB_NOMMAP">DB_NOMMAP</a> or <a href="../../api_c/env_set_flags.html#DB_TXN_NOSYNC">DB_TXN_NOSYNC</a> flags to the <a href="../../api_c/env_open.html">DB_ENV->open</a> method should replace those flags with calls to the <a href="../../api_c/env_set_flags.html">DB_ENV->set_flags</a> method.</p> <table width="100%"><tr><td><br></td><td align=right><a href="../upgrade.3.2/intro.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../upgrade.3.2/callback.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>
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