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87 lines
3.9 KiB
HTML
87 lines
3.9 KiB
HTML
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Support for Multiple Client-to-Client Peers</title>
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<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB Installation and Build Guide" />
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<link rel="up" href="upgrade_11gr2_toc.html" title="Chapter 11. Upgrading Berkeley DB 4.8 applications to Berkeley DB 11.2.5.0" />
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<link rel="prev" href="upgrade_11gr2_autoinit.html" title="DB_REP_CONF_NOAUTOINIT Replaced" />
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<link rel="next" href="build_unix_encrypt.html" title="Cryptography Support" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">Support for Multiple Client-to-Client Peers</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="upgrade_11gr2_autoinit.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 11.
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Upgrading Berkeley DB 4.8 applications to Berkeley DB 11.2.5.0
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="build_unix_encrypt.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="upgrade_11gr2_repmgr"></a>Support for Multiple Client-to-Client Peers</h2>
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</div>
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</div>
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</div>
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<p>
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A Berkeley DB Replication Manager application can now designate one or more
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remote sites (called its "peers") to receive client-to-client requests.
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</p>
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<p>
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In previous releases, there could be only one peer at a time. If you
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called the <code class="literal">DB_ENV->repmgr_add_remote_site</code> method specifying
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site "A" as a peer and you made another call specifying site "B" as a peer,
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site "B" would become the only peer, and site "A" would no longer be a peer.
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</p>
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<p>
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Starting with Berkeley DB 11gR2, the same sequence of calls results in both
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site "A" and site "B" being possible peers. Replication Manager may select
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any of a site's possible peers to use for client-to-client requests. If the
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first peer that the Replication Manager selects cannot be used (for example, it is
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unavailable or it is the current master), Replication Manager attempts to
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use a different peer if there is more than one peer.
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</p>
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<p>
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To get the pre-11gR2 peer behavior in this example, you must
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make an additional call to the <code class="literal">DB_ENV->repmgr_add_remote_site</code> method,
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specifying site "A" and a flag value that excludes the <code class="literal">DB_REPMGR_PEER</code>
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bit value to remove site "A" as a possible peer.
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</p>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="upgrade_11gr2_autoinit.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="upgrade_11gr2_toc.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="build_unix_encrypt.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">DB_REP_CONF_NOAUTOINIT Replaced </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> Cryptography Support</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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