89 lines
4.4 KiB
HTML
89 lines
4.4 KiB
HTML
<!--$Id: repmgr_start.html 63573 2008-05-23 21:43:21Z trent.nelson $-->
|
|
<!--Copyright (c) 1997,2008 Oracle. All rights reserved.-->
|
|
<!--See the file LICENSE for redistribution information.-->
|
|
<html>
|
|
<head>
|
|
<title>Berkeley DB: DB_ENV->repmgr_start</title>
|
|
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
|
|
<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++">
|
|
</head>
|
|
<body bgcolor=white>
|
|
<table width="100%"><tr valign=top>
|
|
<td>
|
|
<b>DB_ENV->repmgr_start</b>
|
|
</td>
|
|
<td align=right>
|
|
<a href="../api_c/api_core.html"><img src="../images/api.gif" alt="API"></a>
|
|
<a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a></td>
|
|
</tr></table>
|
|
<hr size=1 noshade>
|
|
<tt>
|
|
<b><pre>
|
|
#include <db.h>
|
|
<p>
|
|
int
|
|
DB_ENV->repmgr_start(DB_ENV *env, int nthreads, u_int32_t flags);
|
|
</pre></b>
|
|
<hr size=1 noshade>
|
|
<b>Description: DB_ENV->repmgr_start</b>
|
|
<p>The DB_ENV->repmgr_start method starts the replication manager.</p>
|
|
<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>
|
|
<p><li>Call <a href="../api_c/repmgr_local_site.html">DB_ENV->repmgr_set_local_site</a> to configure the local site in the
|
|
replication group.
|
|
<p><li>Call <a href="../api_c/repmgr_remote_site.html">DB_ENV->repmgr_add_remote_site</a> to configure the remote site(s) in
|
|
the replication group.
|
|
<p><li>Call <a href="../api_c/repmgr_ack_policy.html">DB_ENV->repmgr_set_ack_policy</a> to configure the message
|
|
acknowledgment policy which provides the replication group's
|
|
transactional needs.
|
|
<p><li>Call <a href="../api_c/rep_priority.html">DB_ENV->rep_set_priority</a> to configure the local site's election
|
|
priority.
|
|
<p><li>Call DB_ENV->repmgr_start to start the replication application.
|
|
</ol>
|
|
<p>For more information on building replication manager applications,
|
|
please see the "Replication Manager 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 "Advanced Replication Applications Guide" included in the Berkeley DB
|
|
documentation.</p>
|
|
<p>The DB_ENV->repmgr_start method may not be called before the <a href="../api_c/env_open.html">DB_ENV->open</a> method is called.</p>
|
|
<p>The DB_ENV->repmgr_start method
|
|
returns a non-zero error value on failure
|
|
and 0 on success.
|
|
</p>
|
|
<b>Parameters</b> <br>
|
|
<b>flags</b><ul compact><li>The <b>flags</b> parameter must be set to one of the following values:
|
|
<br>
|
|
<b><a name="DB_REP_MASTER">DB_REP_MASTER</a></b><ul compact><li>Start as a master site, and do not call for an election. Note there
|
|
must never be more than a single master in any replication group, and
|
|
only one site at a time should ever be started with the
|
|
DB_REP_MASTER flag specified.</ul>
|
|
<b><a name="DB_REP_CLIENT">DB_REP_CLIENT</a></b><ul compact><li>Start as a client site, and do not call for an election.</ul>
|
|
<b><a name="DB_REP_ELECTION">DB_REP_ELECTION</a></b><ul compact><li>Start as a client, and call for an election if no master is found.</ul>
|
|
<br></ul>
|
|
<b>nthreads</b><ul compact><li>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.</ul>
|
|
<br>
|
|
<hr size=1 noshade>
|
|
<br><b>Class</b>
|
|
<a href="../api_c/env_class.html">DB_ENV</a>
|
|
<br><b>See Also</b>
|
|
<a href="../api_c/rep_list.html">Replication and Related Methods</a>
|
|
</tt>
|
|
<table width="100%"><tr><td><br></td><td align=right>
|
|
<a href="../api_c/api_core.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
|
|
</td></tr></table>
|
|
<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font>
|
|
</body>
|
|
</html>
|