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Start the replication manager as a master site, and do not call for
an election.
</div><p />
<b>Namespace:</b>
<a href="N_BerkeleyDB.htm">BerkeleyDB</a><br />
<b>Assembly:</b>
<span sdata="assembly">libdb_dotnet53</span> (in libdb_dotnet53.dll) Version: 5.3.28.0<h1 class="heading"><span onclick="ExpandCollapse(syntaxToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(syntaxToggle, event)" tabindex="0"><img id="syntaxToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Syntax</span></h1><div id="syntaxSection" class="section" name="collapseableSection" style=""><div id="syntaxCodeBlocks" class="code"><span codeLanguage="CSharp"><table><tr><th>C#</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">void</span> <span class="identifier">RepMgrStartMaster</span>(
<a href="http://msdn2.microsoft.com/en-us/library/td2s409d" target="_blank">int</a> <span class="parameter">nthreads</span>
)</pre></td></tr></table></span><span codeLanguage="VisualBasicDeclaration"><table><tr><th>Visual Basic (Declaration)</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Sub</span> <span class="identifier">RepMgrStartMaster</span> ( _
<span class="parameter">nthreads</span> <span class="keyword">As</span> <a href="http://msdn2.microsoft.com/en-us/library/td2s409d" target="_blank">Integer</a> _
)</pre></td></tr></table></span><span codeLanguage="ManagedCPlusPlus"><table><tr><th>Visual C++</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span>:
<span class="keyword">void</span> <span class="identifier">RepMgrStartMaster</span>(
<a href="http://msdn2.microsoft.com/en-us/library/td2s409d" target="_blank">int</a> <span class="parameter">nthreads</span>
)</pre></td></tr></table></span></div><div id="parameters"><h4 class="subHeading">Parameters</h4><dl paramName="nthreads"><dt><span class="parameter">nthreads</span></dt><dd>Type: <a href="http://msdn2.microsoft.com/en-us/library/td2s409d" target="_blank">System<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span></span>Int32</a><br />
Specify the number of threads of control created and dedicated to
processing replication messages. In addition to these message
processing threads, the replication manager creates and manages a
few of its own threads of control.
</dd></dl></div></div><h1 class="heading"><span onclick="ExpandCollapse(remarksToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(remarksToggle, event)" tabindex="0"><img id="remarksToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Remarks</span></h1><div id="remarksSection" class="section" name="collapseableSection" style="">
<p>
There are two ways to build Berkeley DB replication applications:
the most common approach is to use the Berkeley DB library
"replication manager" support, where the Berkeley DB library manages
the replication group, including network transport, all replication
message processing and acknowledgment, and group elections.
Applications using the replication manager support generally make
the following calls:
</p>
<ol><li>
Configure the local site in the replication group,
<a href="P_BerkeleyDB_DatabaseEnvironment_RepMgrLocalSite.htm">RepMgrLocalSite</a>.
</li><li>
Call <a href="M_BerkeleyDB_DatabaseEnvironment_RepMgrSiteConfig.htm">RepMgrSiteConfig(DbSiteConfig)</a> to configure the remote
site(s) in the replication group.
</li><li>Configure the message acknowledgment policy
(<a href="P_BerkeleyDB_DatabaseEnvironment_RepMgrAckPolicy.htm">RepMgrAckPolicy</a>) which provides the replication group's
transactional needs.
</li><li>
Configure the local site's election priority,
<a href="P_BerkeleyDB_DatabaseEnvironment_RepPriority.htm">RepPriority</a>.
</li><li>
Call <a href="M_BerkeleyDB_DatabaseEnvironment_RepMgrStartClient.htm">RepMgrStartClient(Int32)</a> or
<span class="selflink">RepMgrStartMaster(Int32)</span> to start the replication
application.
</li></ol>
<p>
For more information on building replication manager applications,
please see the Replication Getting Started Guide included in the
Berkeley DB documentation.
</p>
<p>
Applications with special needs (for example, applications using
network protocols not supported by the Berkeley DB replication
manager), must perform additional configuration and call other
Berkeley DB replication methods. For more information on building
advanced replication applications, please see the Base Replication
API section in the Berkeley DB Programmer's Reference Guide for more
information.
</p>
<p>
Starting the replication manager consists of opening the TCP/IP
listening socket to accept incoming connections, and starting all
necessary background threads. When multiple processes share a
database environment, only one process can open the listening
socket; <span class="selflink">RepMgrStartMaster(Int32)</span> (and
<a href="M_BerkeleyDB_DatabaseEnvironment_RepMgrStartClient.htm">RepMgrStartClient(Int32)</a>) automatically open the socket in
the first process to call it, and skips this step in the later calls
from other processes.
</p>
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