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HTML
153 lines
6.1 KiB
HTML
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>DB_ENV->set_metadata_dir()</title>
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<link rel="stylesheet" href="apiReference.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB C API Reference" />
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<link rel="up" href="env.html" title="Chapter 5. The DB_ENV Handle" />
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<link rel="prev" href="envset_memory_max.html" title="DB_ENV->set_memory_max()" />
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<link rel="next" href="envset_msgcall.html" title="DB_ENV->set_msgcall()" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.3</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">DB_ENV->set_metadata_dir()</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="envset_memory_max.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 5.
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The DB_ENV Handle
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="envset_msgcall.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="envset_metadata_dir"></a>DB_ENV->set_metadata_dir()</h2>
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</div>
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</div>
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</div>
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<pre class="programlisting">#include <db.h>
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int
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DB_ENV->set_metadata_dir(DB_ENV *envp, const char *dir); </pre>
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<p>
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The <code class="methodname">DB_ENV->set_metadata_dir()</code> method sets
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the directory where persistent metadata is stored. By default,
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persistent metadata is stored in the environment home
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directory.
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</p>
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<p>
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When used in a replicated application, the metadata directory must
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be the same location for all sites within a replication group.
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</p>
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<p>
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The <code class="methodname">DB_ENV->set_metadata_dir()</code> method may
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not be called after the <a class="xref" href="envopen.html" title="DB_ENV->open()">DB_ENV->open()</a>
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method is called. The directory identified by this method must
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already exist when the <code class="methodname">DB_ENV->open()</code>
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method is called. The directory identified by this method is added
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to the environment's list of data directories, if this directory
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is not already included on that list.
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</p>
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<p>
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The database environment's metadata directory may also be configured
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using the environment's
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<a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a>
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file. The syntax of the entry in that file is a single line with
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the string "set_metadata_dir", one or more whitespace characters,
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followed by the directory location. Because the
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<a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a>
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file is read when the database environment is opened, it will
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silently overrule configuration done before that time.
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</p>
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<p>
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The <code class="methodname">DB_ENV->set_metadata_dir()</code> <span>
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<span>
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method returns a non-zero error value on failure and 0 on success.
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</span>
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</span>
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idp60150336"></a>Parameters</h3>
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</div>
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</div>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="idp60134424"></a>dir</h4>
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>dir</strong></span> parameter
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identifies the directory used to store persistent metadata
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files.
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</p>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idp60142304"></a>Class</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a>
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</p>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idp60104088"></a>See Also</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="xref" href="env.html#envlist" title="Database Environments and Related Methods">Database Environments and Related Methods</a>,
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<a class="xref" href="envget_metadata_dir.html" title="DB_ENV->get_metadata_dir()">DB_ENV->get_metadata_dir()</a>
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</p>
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</div>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="envset_memory_max.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="env.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="envset_msgcall.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">DB_ENV->set_memory_max() </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> DB_ENV->set_msgcall()</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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