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<th colspan="3" align="center">DB_ENV->rep_set_nsites()</th>
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<th width="60%" align="center">Chapter 10.
Replication Methods
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<div class="sect1" lang="en" xml:lang="en">
<div class="titlepage">
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<div>
<h2 class="title" style="clear: both"><a id="repnsites"></a>DB_ENV->rep_set_nsites()</h2>
</div>
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</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 participant
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="idp3818376"></a>Parameters</h3>
</div>
</div>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp3817640"></a>nsites</h4>
</div>
</div>
</div>
<p>
An integer specifying the total number of participant sites in the replication
group. This number should exclude any replication views.
</p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idp3819232"></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="idp3816712"></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="idp3798600"></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="idp3825896"></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>
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