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<th colspan="3" align="center">DbEnv::get_backup_config()</th>
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<div>
<h2 class="title" style="clear: both"><a id="envget_backup_config"></a>DbEnv::get_backup_config()</h2>
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</div>
<pre class="programlisting">#include <db_cxx.h>
DB_ENV->get_backup_config(db_backup_config_t option, u_int32_t *valuep);</pre>
<p>
The <code class="methodname">DbEnv::get_backup_config()</code> method
retrieves the value set for hot backup tuning parameters. See the
<a class="xref" href="envbackup.html" title="DbEnv::backup()">DbEnv::backup()</a>
and
<a class="xref" href="envdbbackup.html" title="DbEnv::dbbackup()">DbEnv::dbbackup()</a>
methods for a description of the hot backup APIs. These tuning
parameters can be set using the
<a class="xref" href="envset_backup_config.html" title="DbEnv::set_backup_config()">DbEnv::set_backup_config()</a>
method.
</p>
<p>
The <code class="methodname">DbEnv::get_backup_config()</code> method may
be called at any time during the life of the application.
</p>
<p>
The <code class="methodname">DbEnv::get_backup_config()</code> <span>
<span>
method either returns a non-zero error value or throws an
exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
</span>
</span>
</p>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
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<h3 class="title"><a id="idp6839168"></a>Parameters</h3>
</div>
</div>
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<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp6838416"></a>option</h4>
</div>
</div>
</div>
<p>
The <span class="bold"><strong>option</strong></span> parameter
identifies the backup parameter to be retrieved. It
must be one of the following:
</p>
<div class="itemizedlist">
<ul type="disc">
<li>
<p>
<code class="literal">DB_BACKUP_WRITE_DIRECT</code>
</p>
<p>
Turning this on causes direct I/O to be used when
writing pages to the disk.
</p>
</li>
<li>
<p>
<code class="literal">DB_BACKUP_READ_COUNT</code>
</p>
<p>
Configures the number of pages to read before
pausing.
</p>
</li>
<li>
<p>
<code class="literal">DB_BACKUP_READ_SLEEP</code>
</p>
<p>
Configures the number of microseconds to sleep
between batches of reads.
</p>
</li>
<li>
<p>
<code class="literal">DB_BACKUP_SIZE</code>
</p>
<p>
Configures the size of the buffer, in megabytes, to
read from the database.
</p>
</li>
</ul>
</div>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp6852008"></a>valuep</h4>
</div>
</div>
</div>
<p>
The <span class="bold"><strong>valuep</strong></span> parameter
references memory into which is copied the current value of the
backup tuning parameter identified by the
<span class="bold"><strong>option</strong></span> parameter.
</p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
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<h3 class="title"><a id="idp6840944"></a>Class</h3>
</div>
</div>
</div>
<p>
<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>,
</p>
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<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idp6853736"></a>See Also</h3>
</div>
</div>
</div>
<p>
<a class="xref" href="env.html#envlist" title="Database Environments and Related Methods">Database Environments and Related Methods</a>,
<a class="xref" href="envset_backup_config.html" title="DbEnv::set_backup_config()">DbEnv::set_backup_config()</a>,
<a class="xref" href="envbackup.html" title="DbEnv::backup()">DbEnv::backup()</a>,
<a class="xref" href="envdbbackup.html" title="DbEnv::dbbackup()">DbEnv::dbbackup()</a>
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