mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-16 17:16:25 +00:00
194 lines
7.5 KiB
HTML
194 lines
7.5 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
<html xmlns="http://www.w3.org/1999/xhtml">
|
||
<head>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
|
||
<title>DB_ENV->get_backup_config()</title>
|
||
<link rel="stylesheet" href="apiReference.css" type="text/css" />
|
||
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
|
||
<link rel="start" href="index.html" title="Berkeley DB C API Reference" />
|
||
<link rel="up" href="env.html" title="Chapter 5. The DB_ENV Handle" />
|
||
<link rel="prev" href="envget_backup_callbacks.html" title="DB_ENV->get_backup_callbacks()" />
|
||
<link rel="next" href="envget_flags.html" title="DB_ENV->get_flags()" />
|
||
</head>
|
||
<body>
|
||
<div xmlns="" class="navheader">
|
||
<div class="libver">
|
||
<p>Library Version 11.2.5.3</p>
|
||
</div>
|
||
<table width="100%" summary="Navigation header">
|
||
<tr>
|
||
<th colspan="3" align="center">DB_ENV->get_backup_config()</th>
|
||
</tr>
|
||
<tr>
|
||
<td width="20%" align="left"><a accesskey="p" href="envget_backup_callbacks.html">Prev</a> </td>
|
||
<th width="60%" align="center">Chapter 5.
|
||
The DB_ENV Handle
|
||
</th>
|
||
<td width="20%" align="right"> <a accesskey="n" href="envget_flags.html">Next</a></td>
|
||
</tr>
|
||
</table>
|
||
<hr />
|
||
</div>
|
||
<div class="sect1" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h2 class="title" style="clear: both"><a id="envget_backup_config"></a>DB_ENV->get_backup_config()</h2>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<pre class="programlisting">#include <db.h>
|
||
|
||
DB_ENV->get_backup_config(DB_ENV, db_backup_config_t option,
|
||
u_int32_t *valuep); </pre>
|
||
<p>
|
||
The <code class="methodname">DB_ENV->get_backup_config()</code> method
|
||
retrieves the value set for hot backup tuning parameters. See the
|
||
<a class="xref" href="envbackup.html" title="DB_ENV->backup()">DB_ENV->backup()</a>
|
||
and
|
||
<a class="xref" href="envdbbackup.html" title="DB_ENV->dbbackup()">DB_ENV->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="DB_ENV->set_backup_config()">DB_ENV->set_backup_config()</a>
|
||
method.
|
||
</p>
|
||
<p>
|
||
The <code class="methodname">DB_ENV->get_backup_config()</code> method may
|
||
be called at any time during the life of the application.
|
||
</p>
|
||
<p>
|
||
The <code class="methodname">DB_ENV->get_backup_config()</code> <span>
|
||
<span>
|
||
method returns a non-zero error value on failure and 0 on success.
|
||
</span>
|
||
|
||
</span>
|
||
</p>
|
||
<div class="sect2" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h3 class="title"><a id="idp59477688"></a>Parameters</h3>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="idp59476936"></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="idp59490632"></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>
|
||
<div>
|
||
<h3 class="title"><a id="idp59471112"></a>Class</h3>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
<a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a>,
|
||
</p>
|
||
</div>
|
||
<div class="sect2" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h3 class="title"><a id="idp59493240"></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="DB_ENV->set_backup_config()">DB_ENV->set_backup_config()</a>,
|
||
<a class="xref" href="envbackup.html" title="DB_ENV->backup()">DB_ENV->backup()</a>,
|
||
<a class="xref" href="envdbbackup.html" title="DB_ENV->dbbackup()">DB_ENV->dbbackup()</a>
|
||
</p>
|
||
</div>
|
||
</div>
|
||
<div class="navfooter">
|
||
<hr />
|
||
<table width="100%" summary="Navigation footer">
|
||
<tr>
|
||
<td width="40%" align="left"><a accesskey="p" href="envget_backup_callbacks.html">Prev</a> </td>
|
||
<td width="20%" align="center">
|
||
<a accesskey="u" href="env.html">Up</a>
|
||
</td>
|
||
<td width="40%" align="right"> <a accesskey="n" href="envget_flags.html">Next</a></td>
|
||
</tr>
|
||
<tr>
|
||
<td width="40%" align="left" valign="top">DB_ENV->get_backup_callbacks() </td>
|
||
<td width="20%" align="center">
|
||
<a accesskey="h" href="index.html">Home</a>
|
||
</td>
|
||
<td width="40%" align="right" valign="top"> DB_ENV->get_flags()</td>
|
||
</tr>
|
||
</table>
|
||
</div>
|
||
</body>
|
||
</html>
|