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<title>Berkeley DB Reference Guide: Release 3.2: DB_ENV->set_flags</title>
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<td><h3><dl><dt>Berkeley DB Reference Guide:<dd>Upgrading Berkeley DB Applications</dl></h3></td>
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<h1 align=center>Release 3.2: DB_ENV->set_flags</h1>
<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 interface 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>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.
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