<?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->rep_set_nsites()</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="rep.html" title="Chapter 10. Replication Methods" /> <link rel="prev" href="repset_limit.html" title="DB_ENV->rep_set_limit()" /> <link rel="next" href="reppriority.html" title="DB_ENV->rep_set_priority()" /> </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->rep_set_nsites()</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="repset_limit.html">Prev</a> </td> <th width="60%" align="center">Chapter 10. Replication Methods </th> <td width="20%" align="right"> <a accesskey="n" href="reppriority.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="repnsites"></a>DB_ENV->rep_set_nsites()</h2> </div> </div> </div> <pre class="programlisting">#include <db.h> int DB_ENV->rep_set_nsites(DB_ENV *env, u_int32_t nsites); </pre> <p> The <code class="methodname">DB_ENV->rep_set_nsites()</code> method specifies the total number of sites in a replication group. This method should not be used by Replication Manager applications; the number of sites in use by a Replication Manager application is determined dynamically. </p> <p> The <code class="methodname">DB_ENV->rep_set_nsites()</code> method is typically called by Base API applications. (However, see also the <a class="xref" href="repelect.html" title="DB_ENV->rep_elect()">DB_ENV->rep_elect()</a> method <span class="bold"><strong>nsites</strong></span> parameter.) </p> <p> The database environment's replication subsystem may also be configured using the environment's <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file. The syntax of the entry in that file is a single line with the string "rep_set_nsites", one or more whitespace characters, and the number of sites specified. For example, "rep_set_nsites 5" sets the number of sites to 5. Because the <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file is read when the database environment is opened, it will silently overrule configuration done before that time. </p> <p> The <code class="methodname">DB_ENV->rep_set_nsites()</code> method configures a database environment, not only operations performed using the specified <a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a> handle. </p> <p> If master leases are in use, the <code class="methodname">DB_ENV->rep_set_nsites()</code> method should not be called after the <a class="xref" href="repstart.html" title="DB_ENV->rep_start()">DB_ENV->rep_start()</a> method is called as this could cause you to lose data previously thought to be durable. If master leases are not in use, the <code class="methodname">DB_ENV->rep_set_nsites()</code> method may be called at any time during the life of the application. </p> <p> The <code class="methodname">DB_ENV->rep_set_nsites()</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="idp54150216"></a>Parameters</h3> </div> </div> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="idp54149096"></a>nsites</h4> </div> </div> </div> <p> An integer specifying the total number of sites in the replication group. </p> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp54151072"></a>Errors</h3> </div> </div> </div> <p> The <code class="methodname">DB_ENV->rep_set_nsites()</code> <span> <span> method may fail and return one of the following non-zero errors: </span> </span> </p> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="idp54148984"></a>EINVAL</h4> </div> </div> </div> <p> If master leases are in use and replication has already been started; or if an invalid flag value or parameter was specified. </p> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp54137432"></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="idp54157544"></a>See Also</h3> </div> </div> </div> <p> <a class="xref" href="rep.html#replist" title="Replication and Related Methods">Replication and Related Methods</a> </p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="repset_limit.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="rep.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="reppriority.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">DB_ENV->rep_set_limit() </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> DB_ENV->rep_set_priority()</td> </tr> </table> </div> </body> </html>