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Posted to commits@qpid.apache.org by or...@apache.org on 2018/03/04 21:23:19 UTC
[27/32] qpid-site git commit: QPID-8112: Update site content for Qpid
Broker-J 7.0.2
http://git-wip-us.apache.org/repos/asf/qpid-site/blob/91891e66/content/releases/qpid-broker-j-7.0.2/book/Java-Broker-Getting-Started.html
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diff --git a/content/releases/qpid-broker-j-7.0.2/book/Java-Broker-Getting-Started.html b/content/releases/qpid-broker-j-7.0.2/book/Java-Broker-Getting-Started.html
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+<!DOCTYPE html>
+<!--
+ -
+ - Licensed to the Apache Software Foundation (ASF) under one
+ - or more contributor license agreements. See the NOTICE file
+ - distributed with this work for additional information
+ - regarding copyright ownership. The ASF licenses this file
+ - to you under the Apache License, Version 2.0 (the
+ - "License"); you may not use this file except in compliance
+ - with the License. You may obtain a copy of the License at
+ -
+ - http://www.apache.org/licenses/LICENSE-2.0
+ -
+ - Unless required by applicable law or agreed to in writing,
+ - software distributed under the License is distributed on an
+ - "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ - KIND, either express or implied. See the License for the
+ - specific language governing permissions and limitations
+ - under the License.
+ -
+-->
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
+ <head>
+ <title>Chapter 3. Getting Started - Apache Qpid™</title>
+ <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
+ <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+ <link rel="stylesheet" href="/site.css" type="text/css" async="async"/>
+ <link rel="stylesheet" href="/deferred.css" type="text/css" defer="defer"/>
+ <script type="text/javascript">var _deferredFunctions = [];</script>
+ <script type="text/javascript" src="/deferred.js" defer="defer"></script>
+ <!--[if lte IE 8]>
+ <link rel="stylesheet" href="/ie.css" type="text/css"/>
+ <script type="text/javascript" src="/html5shiv.js"></script>
+ <![endif]-->
+
+ <!-- Redirects for `go get` and godoc.org -->
+ <meta name="go-import"
+ content="qpid.apache.org git https://git-wip-us.apache.org/repos/asf/qpid-proton.git"/>
+ <meta name="go-source"
+ content="qpid.apache.org
+https://github.com/apache/qpid-proton/blob/go1/README.md
+https://github.com/apache/qpid-proton/tree/go1{/dir}
+https://github.com/apache/qpid-proton/blob/go1{/dir}/{file}#L{line}"/>
+ </head>
+ <body>
+ <div id="-content">
+ <div id="-top" class="panel">
+ <a id="-menu-link"><img width="16" height="16" src="" alt="Menu"/></a>
+
+ <a id="-search-link"><img width="22" height="16" src="" alt="Search"/></a>
+
+ <ul id="-global-navigation">
+ <li><a id="-logotype" href="/index.html">Apache Qpid<sup>™</sup></a></li>
+ <li><a href="/documentation.html">Documentation</a></li>
+ <li><a href="/download.html">Download</a></li>
+ <li><a href="/discussion.html">Discussion</a></li>
+ </ul>
+ </div>
+
+ <div id="-menu" class="panel" style="display: none;">
+ <div class="flex">
+ <section>
+ <h3>Project</h3>
+
+ <ul>
+ <li><a href="/overview.html">Overview</a></li>
+ <li><a href="/components/index.html">Components</a></li>
+ <li><a href="/releases/index.html">Releases</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Messaging APIs</h3>
+
+ <ul>
+ <li><a href="/proton/index.html">Qpid Proton</a></li>
+ <li><a href="/components/jms/index.html">Qpid JMS</a></li>
+ <li><a href="/components/messaging-api/index.html">Qpid Messaging API</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Servers and tools</h3>
+
+ <ul>
+ <li><a href="/components/broker-j/index.html">Broker-J</a></li>
+ <li><a href="/components/cpp-broker/index.html">C++ broker</a></li>
+ <li><a href="/components/dispatch-router/index.html">Dispatch router</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Resources</h3>
+
+ <ul>
+ <li><a href="/dashboard.html">Dashboard</a></li>
+ <li><a href="https://cwiki.apache.org/confluence/display/qpid/Index">Wiki</a></li>
+ <li><a href="/resources.html">More resources</a></li>
+ </ul>
+ </section>
+ </div>
+ </div>
+
+ <div id="-search" class="panel" style="display: none;">
+ <form action="http://www.google.com/search" method="get">
+ <input type="hidden" name="sitesearch" value="qpid.apache.org"/>
+ <input type="text" name="q" maxlength="255" autofocus="autofocus" tabindex="1"/>
+ <button type="submit">Search</button>
+ <a href="/search.html">More ways to search</a>
+ </form>
+ </div>
+
+ <div id="-middle" class="panel">
+ <ul id="-path-navigation"><li><a href="/index.html">Home</a></li><li><a href="/releases/index.html">Releases</a></li><li><a href="/releases/qpid-broker-j-7.0.2/index.html">Qpid Broker-J 7.0.2</a></li><li><a href="/releases/qpid-broker-j-7.0.2/book/index.html">Apache Qpid Broker-J</a></li><li>Chapter 3. Getting Started</li></ul>
+
+ <div id="-middle-content">
+ <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">Chapter 3. Getting Started</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="Java-Broker-Installation-OptionalDependencies.html">Prev</a> </td><th align="center" width="60%"> </th><td align="right" width="20%"> <a accesskey="n" href="Java-Broker-Getting-Started-Starting-Stopping-Windows.html">Next</a></td></tr></table><hr /></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a id="Java-Broker-Getting-Started"></a>Chapter 3. Getting Started</h1></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="section"><a href="Java-Broker-Getting-Started.html#Java-Broker-Getting-Started-Introduction">3.1. Introduction</a></span></dt><dt><span class="section"><a href="Java-Broker-Getting-Started-Starting-Stopping-Windows.html">3.2.
Starting/Stopping the broker on Windows</a></span></dt><dt><span class="section"><a href="Java-Broker-Getting-Started-Starting-Stopping-Unix.html">3.3. Starting/Stopping the broker on Unix</a></span></dt><dt><span class="section"><a href="Java-Broker-Getting-Started-Logging.html">3.4. Log file</a></span></dt><dt><span class="section"><a href="Java-Broker-Getting-Started-CommandLine.html">3.5. Using the command line</a></span></dt></dl></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="Java-Broker-Getting-Started-Introduction"></a>3.1. Introduction</h2></div></div></div><p>
+ This section describes how to start and stop the Broker, and outlines the various command line options.
+ </p><p>
+ For additional details about the broker configuration store and related command line arguments see
+ <a class="xref" href="Java-Broker-Initial-Configuration.html" title="Chapter 5. Initial Configuration">Chapter 5, <em>Initial Configuration</em></a>.
+ The broker is fully configurable via its Web Management Console, for details of this see
+ <a class="xref" href="Java-Broker-Management-Channel-Web-Console.html" title="6.2. Web Management Console">Section 6.2, “Web Management Console”</a>.
+ </p></div></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="Java-Broker-Installation-OptionalDependencies.html">Prev</a> </td><td align="center" width="20%"> </td><td align="right" width="40%"> <a accesskey="n" href="Java-Broker-Getting-Started-Starting-Stopping-Windows.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">2.6. Optional Dependencies </td><td align="center" width="20%"><a accesskey="h" href="Apache-Qpid-Broker-J-Book.html">Home</a></td><td align="right" valign="top" width="40%"> 3.2. Starting/Stopping the broker on Windows</td></tr></table></div></div>
+
+ <hr/>
+
+ <ul id="-apache-navigation">
+ <li><a href="http://www.apache.org/">Apache</a></li>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks!</a></li>
+ <li><a href="/security.html">Security</a></li>
+ <li><a href="http://www.apache.org/"><img id="-apache-feather" width="48" height="14" src="" alt="Apache"/></a></li>
+ </ul>
+
+ <p id="-legal">
+ Apache Qpid, Messaging built on AMQP; Copyright © 2015
+ The Apache Software Foundation; Licensed under
+ the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache
+ License, Version 2.0</a>; Apache Qpid, Qpid, Qpid Proton,
+ Proton, Apache, the Apache feather logo, and the Apache Qpid
+ project logo are trademarks of The Apache Software
+ Foundation; All other marks mentioned may be trademarks or
+ registered trademarks of their respective owners
+ </p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
http://git-wip-us.apache.org/repos/asf/qpid-site/blob/91891e66/content/releases/qpid-broker-j-7.0.2/book/Java-Broker-High-Availability-Backup.html
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diff --git a/content/releases/qpid-broker-j-7.0.2/book/Java-Broker-High-Availability-Backup.html b/content/releases/qpid-broker-j-7.0.2/book/Java-Broker-High-Availability-Backup.html
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+<!DOCTYPE html>
+<!--
+ -
+ - Licensed to the Apache Software Foundation (ASF) under one
+ - or more contributor license agreements. See the NOTICE file
+ - distributed with this work for additional information
+ - regarding copyright ownership. The ASF licenses this file
+ - to you under the Apache License, Version 2.0 (the
+ - "License"); you may not use this file except in compliance
+ - with the License. You may obtain a copy of the License at
+ -
+ - http://www.apache.org/licenses/LICENSE-2.0
+ -
+ - Unless required by applicable law or agreed to in writing,
+ - software distributed under the License is distributed on an
+ - "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ - KIND, either express or implied. See the License for the
+ - specific language governing permissions and limitations
+ - under the License.
+ -
+-->
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
+ <head>
+ <title>10.10. Backups - Apache Qpid™</title>
+ <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
+ <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+ <link rel="stylesheet" href="/site.css" type="text/css" async="async"/>
+ <link rel="stylesheet" href="/deferred.css" type="text/css" defer="defer"/>
+ <script type="text/javascript">var _deferredFunctions = [];</script>
+ <script type="text/javascript" src="/deferred.js" defer="defer"></script>
+ <!--[if lte IE 8]>
+ <link rel="stylesheet" href="/ie.css" type="text/css"/>
+ <script type="text/javascript" src="/html5shiv.js"></script>
+ <![endif]-->
+
+ <!-- Redirects for `go get` and godoc.org -->
+ <meta name="go-import"
+ content="qpid.apache.org git https://git-wip-us.apache.org/repos/asf/qpid-proton.git"/>
+ <meta name="go-source"
+ content="qpid.apache.org
+https://github.com/apache/qpid-proton/blob/go1/README.md
+https://github.com/apache/qpid-proton/tree/go1{/dir}
+https://github.com/apache/qpid-proton/blob/go1{/dir}/{file}#L{line}"/>
+ </head>
+ <body>
+ <div id="-content">
+ <div id="-top" class="panel">
+ <a id="-menu-link"><img width="16" height="16" src="" alt="Menu"/></a>
+
+ <a id="-search-link"><img width="22" height="16" src="" alt="Search"/></a>
+
+ <ul id="-global-navigation">
+ <li><a id="-logotype" href="/index.html">Apache Qpid<sup>™</sup></a></li>
+ <li><a href="/documentation.html">Documentation</a></li>
+ <li><a href="/download.html">Download</a></li>
+ <li><a href="/discussion.html">Discussion</a></li>
+ </ul>
+ </div>
+
+ <div id="-menu" class="panel" style="display: none;">
+ <div class="flex">
+ <section>
+ <h3>Project</h3>
+
+ <ul>
+ <li><a href="/overview.html">Overview</a></li>
+ <li><a href="/components/index.html">Components</a></li>
+ <li><a href="/releases/index.html">Releases</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Messaging APIs</h3>
+
+ <ul>
+ <li><a href="/proton/index.html">Qpid Proton</a></li>
+ <li><a href="/components/jms/index.html">Qpid JMS</a></li>
+ <li><a href="/components/messaging-api/index.html">Qpid Messaging API</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Servers and tools</h3>
+
+ <ul>
+ <li><a href="/components/broker-j/index.html">Broker-J</a></li>
+ <li><a href="/components/cpp-broker/index.html">C++ broker</a></li>
+ <li><a href="/components/dispatch-router/index.html">Dispatch router</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Resources</h3>
+
+ <ul>
+ <li><a href="/dashboard.html">Dashboard</a></li>
+ <li><a href="https://cwiki.apache.org/confluence/display/qpid/Index">Wiki</a></li>
+ <li><a href="/resources.html">More resources</a></li>
+ </ul>
+ </section>
+ </div>
+ </div>
+
+ <div id="-search" class="panel" style="display: none;">
+ <form action="http://www.google.com/search" method="get">
+ <input type="hidden" name="sitesearch" value="qpid.apache.org"/>
+ <input type="text" name="q" maxlength="255" autofocus="autofocus" tabindex="1"/>
+ <button type="submit">Search</button>
+ <a href="/search.html">More ways to search</a>
+ </form>
+ </div>
+
+ <div id="-middle" class="panel">
+ <ul id="-path-navigation"><li><a href="/index.html">Home</a></li><li><a href="/releases/index.html">Releases</a></li><li><a href="/releases/qpid-broker-j-7.0.2/index.html">Qpid Broker-J 7.0.2</a></li><li><a href="/releases/qpid-broker-j-7.0.2/book/index.html">Apache Qpid Broker-J</a></li><li>10.10. Backups</li></ul>
+
+ <div id="-middle-content">
+ <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">10.10. Backups</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="Java-Broker-High-Availability-Security.html">Prev</a> </td><th align="center" width="60%">Chapter 10. High Availability</th><td align="right" width="20%"> <a accesskey="n" href="Java-Broker-High-Availability-Reset-Group-Infomational.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="Java-Broker-High-Availability-Backup"></a>10.10. Backups</h2></div></div></div><p>It is recommend to use the hot backup script to periodically backup every node in the
+ group. <a class="xref" href="Java-Broker-Backup-And-Recovery-Virtualhost-Node.html#Java-Broker-Backup-And-Recovery-Virtualhost-Node-BDB-HA" title="11.2.2. BDB-HA">Section 11.2.2, “BDB-HA”</a>.</p></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="Java-Broker-High-Availability-Security.html">Prev</a> </td><td align="center" width="20%"><a accesskey="u" href="Java-Broker-High-Availability.html">Up</a></td><td align="right" width="40%"> <a accesskey="n" href="Java-Broker-High-Availability-Reset-Group-Infomational.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">10.9. Security </td><td align="center" width="20%"><a accesskey="h" href="Apache-Qpid-Broker-J-Book.html">Home</a></td><td align="right" valign="top" width="40%"> 10.11. Reset Group Information</td></tr></table></div></div>
+
+ <hr/>
+
+ <ul id="-apache-navigation">
+ <li><a href="http://www.apache.org/">Apache</a></li>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks!</a></li>
+ <li><a href="/security.html">Security</a></li>
+ <li><a href="http://www.apache.org/"><img id="-apache-feather" width="48" height="14" src="" alt="Apache"/></a></li>
+ </ul>
+
+ <p id="-legal">
+ Apache Qpid, Messaging built on AMQP; Copyright © 2015
+ The Apache Software Foundation; Licensed under
+ the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache
+ License, Version 2.0</a>; Apache Qpid, Qpid, Qpid Proton,
+ Proton, Apache, the Apache feather logo, and the Apache Qpid
+ project logo are trademarks of The Apache Software
+ Foundation; All other marks mentioned may be trademarks or
+ registered trademarks of their respective owners
+ </p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
http://git-wip-us.apache.org/repos/asf/qpid-site/blob/91891e66/content/releases/qpid-broker-j-7.0.2/book/Java-Broker-High-Availability-Behaviour.html
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diff --git a/content/releases/qpid-broker-j-7.0.2/book/Java-Broker-High-Availability-Behaviour.html b/content/releases/qpid-broker-j-7.0.2/book/Java-Broker-High-Availability-Behaviour.html
new file mode 100644
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--- /dev/null
+++ b/content/releases/qpid-broker-j-7.0.2/book/Java-Broker-High-Availability-Behaviour.html
@@ -0,0 +1,226 @@
+<!DOCTYPE html>
+<!--
+ -
+ - Licensed to the Apache Software Foundation (ASF) under one
+ - or more contributor license agreements. See the NOTICE file
+ - distributed with this work for additional information
+ - regarding copyright ownership. The ASF licenses this file
+ - to you under the Apache License, Version 2.0 (the
+ - "License"); you may not use this file except in compliance
+ - with the License. You may obtain a copy of the License at
+ -
+ - http://www.apache.org/licenses/LICENSE-2.0
+ -
+ - Unless required by applicable law or agreed to in writing,
+ - software distributed under the License is distributed on an
+ - "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ - KIND, either express or implied. See the License for the
+ - specific language governing permissions and limitations
+ - under the License.
+ -
+-->
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
+ <head>
+ <title>10.4. Behaviour of the Group - Apache Qpid™</title>
+ <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
+ <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+ <link rel="stylesheet" href="/site.css" type="text/css" async="async"/>
+ <link rel="stylesheet" href="/deferred.css" type="text/css" defer="defer"/>
+ <script type="text/javascript">var _deferredFunctions = [];</script>
+ <script type="text/javascript" src="/deferred.js" defer="defer"></script>
+ <!--[if lte IE 8]>
+ <link rel="stylesheet" href="/ie.css" type="text/css"/>
+ <script type="text/javascript" src="/html5shiv.js"></script>
+ <![endif]-->
+
+ <!-- Redirects for `go get` and godoc.org -->
+ <meta name="go-import"
+ content="qpid.apache.org git https://git-wip-us.apache.org/repos/asf/qpid-proton.git"/>
+ <meta name="go-source"
+ content="qpid.apache.org
+https://github.com/apache/qpid-proton/blob/go1/README.md
+https://github.com/apache/qpid-proton/tree/go1{/dir}
+https://github.com/apache/qpid-proton/blob/go1{/dir}/{file}#L{line}"/>
+ </head>
+ <body>
+ <div id="-content">
+ <div id="-top" class="panel">
+ <a id="-menu-link"><img width="16" height="16" src="" alt="Menu"/></a>
+
+ <a id="-search-link"><img width="22" height="16" src="" alt="Search"/></a>
+
+ <ul id="-global-navigation">
+ <li><a id="-logotype" href="/index.html">Apache Qpid<sup>™</sup></a></li>
+ <li><a href="/documentation.html">Documentation</a></li>
+ <li><a href="/download.html">Download</a></li>
+ <li><a href="/discussion.html">Discussion</a></li>
+ </ul>
+ </div>
+
+ <div id="-menu" class="panel" style="display: none;">
+ <div class="flex">
+ <section>
+ <h3>Project</h3>
+
+ <ul>
+ <li><a href="/overview.html">Overview</a></li>
+ <li><a href="/components/index.html">Components</a></li>
+ <li><a href="/releases/index.html">Releases</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Messaging APIs</h3>
+
+ <ul>
+ <li><a href="/proton/index.html">Qpid Proton</a></li>
+ <li><a href="/components/jms/index.html">Qpid JMS</a></li>
+ <li><a href="/components/messaging-api/index.html">Qpid Messaging API</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Servers and tools</h3>
+
+ <ul>
+ <li><a href="/components/broker-j/index.html">Broker-J</a></li>
+ <li><a href="/components/cpp-broker/index.html">C++ broker</a></li>
+ <li><a href="/components/dispatch-router/index.html">Dispatch router</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Resources</h3>
+
+ <ul>
+ <li><a href="/dashboard.html">Dashboard</a></li>
+ <li><a href="https://cwiki.apache.org/confluence/display/qpid/Index">Wiki</a></li>
+ <li><a href="/resources.html">More resources</a></li>
+ </ul>
+ </section>
+ </div>
+ </div>
+
+ <div id="-search" class="panel" style="display: none;">
+ <form action="http://www.google.com/search" method="get">
+ <input type="hidden" name="sitesearch" value="qpid.apache.org"/>
+ <input type="text" name="q" maxlength="255" autofocus="autofocus" tabindex="1"/>
+ <button type="submit">Search</button>
+ <a href="/search.html">More ways to search</a>
+ </form>
+ </div>
+
+ <div id="-middle" class="panel">
+ <ul id="-path-navigation"><li><a href="/index.html">Home</a></li><li><a href="/releases/index.html">Releases</a></li><li><a href="/releases/qpid-broker-j-7.0.2/index.html">Qpid Broker-J 7.0.2</a></li><li><a href="/releases/qpid-broker-j-7.0.2/book/index.html">Apache Qpid Broker-J</a></li><li>10.4. Behaviour of the Group</li></ul>
+
+ <div id="-middle-content">
+ <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">10.4. Behaviour of the Group</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="Java-Broker-High-Availability-CreatingGroup.html">Prev</a> </td><th align="center" width="60%">Chapter 10. High Availability</th><td align="right" width="20%"> <a accesskey="n" href="Java-Broker-High-Availability-NodeOperations.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="Java-Broker-High-Availability-Behaviour"></a>10.4. Behaviour of the Group</h2></div></div></div><p>This section first describes the behaviour of the group in its default configuration. It
+ then goes on to talk about the various controls that are available to override it. It
+ describes the controls available that affect the <a class="link" href="http://en.wikipedia.org/wiki/ACID#Durability" target="_top">durability</a> of transactions and
+ the data consistency between the master and replicas and thus make trade offs between
+ performance and reliability.</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-High-Availability-Behaviour-Default-Behaviour"></a>10.4.1. Default Behaviour</h3></div></div></div><p>Let's first look at the behaviour of a group in default configuration.</p><p>In the default configuration, for any messaging work to be done, there must be at least
+ <span class="emphasis"><em>quorum</em></span> nodes present. This means for example, in a three node group,
+ this means there must be at least two nodes available.</p><p>When a messaging client sends a transaction, it can be assured that, before the control
+ returns back to his application after the commit call that the following is true:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>At the master, the transaction is <span class="emphasis"><em>written to disk and OS level caches
+ are flushed</em></span> meaning the data is on the storage device.</p></li><li class="listitem"><p>At least quorum minus 1 replicas, <span class="emphasis"><em>acknowledge the receipt of
+ transaction</em></span>. The replicas will write the data to the storage device
+ sometime later.</p></li></ul></div><p>If there were to be a master failure immediately after the transaction was committed,
+ the transaction would be held by at least quorum minus one replicas. For example, if we had
+ a group of three, then we would be assured that at least one replica held the
+ transaction.</p><p>In the event of a master failure, if quorum nodes remain, those nodes hold an election.
+ The nodes will elect master the node with the most recent transaction. If two or more nodes
+ have the most recent transaction the group makes an arbitrary choice. If quorum number of
+ nodes does not remain, the nodes cannot elect a new master and will wait until nodes rejoin.
+ You will see later that manual controls are available allow service to be restored from
+ fewer than quorum nodes and to influence which node gets elected in the event of a
+ tie.</p><p>Whenever a group has fewer than quorum nodes present, the virtualhost will be
+ unavailable and messaging connections will be refused. If quorum disappears at the very
+ moment a messaging client sends a transaction that transaction will fail.</p><p>You will have noticed the difference in the synchronization policies applied the master
+ and the replicas. The replicas send the acknowledgement back before the data is written to
+ disk. The master synchronously writes the transaction to storage. This is an example of a
+ trade off between durability and performance. We will see more about how to control this
+ trade off later.</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-High-Availability-Behaviour-SynchronizationPolicy"></a>10.4.2. Synchronization Policy</h3></div></div></div><p>The <span class="emphasis"><em>synchronization policy</em></span> dictates what a node must do when it
+ receives a transaction before it acknowledges that transaction to the rest of the
+ group.</p><p>The following options are available: </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><span class="emphasis"><em>SYNC</em></span>. The node must write the transaction to disk and flush
+ any OS level buffers before sending the acknowledgement. SYNC is offers the highest
+ durability but offers the least performance.</p></li><li class="listitem"><p><span class="emphasis"><em>WRITE_NO_SYNC</em></span>. The node must write the transaction to disk
+ before sending the acknowledgement. OS level buffers will be flush as some point
+ later. This typically provides an assurance against failure of the application but not
+ the operating system or hardware.</p></li><li class="listitem"><p><span class="emphasis"><em>NO_SYNC</em></span>. The node immediately sends the acknowledgement. The
+ transaction will be written and OS level buffers flushed as some point later. NO_SYNC
+ offers the highest performance but the lowest durability level. This synchronization
+ policy is sometimes known as <span class="emphasis"><em>commit to the network</em></span>.</p></li></ul></div><p>It is possible to assign a one policy to the master and a different policy to the
+ replicas. These are configured as <a class="link" href="Java-Broker-Management-Managing-Virtualhosts.html#Java-Broker-Management-Managing-Virtualhost-Attributes" title="7.4.3. Attributes">attributes on the
+ virtualhost</a>. By default the master uses <span class="emphasis"><em>SYNC</em></span> and replicas use
+ <span class="emphasis"><em>NO_SYNC</em></span>.</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-High-Availability-Behaviour-NodePriority"></a>10.4.3. Node Priority</h3></div></div></div><p>Node priority can be used to influence the behaviour of the election algorithm. It is
+ useful in the case were you want to favour some nodes over others. For instance, if you wish
+ to favour nodes located in a particular data centre over those in a remote site. </p><p>The following options are available: </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><span class="emphasis"><em>Highest</em></span>. Nodes with this priority will be more favoured. In
+ the event of two or more nodes having the most recent transaction, the node with this
+ priority will be elected master. If two or more nodes have this priority the algorithm
+ will make an arbitrary choice.</p></li><li class="listitem"><p><span class="emphasis"><em>High</em></span>. Nodes with this priority will be favoured but not as
+ much so as those with Highest.</p></li><li class="listitem"><p><span class="emphasis"><em>Normal</em></span>. This is default election priority.</p></li><li class="listitem"><p><span class="emphasis"><em>Never</em></span>. The node will never be elected <span class="emphasis"><em>even if the
+ node has the most recent transaction</em></span>. The node will still keep up to date
+ with the replication stream and will still vote itself, but can just never be
+ elected.</p></li></ul></div><p>
+ </p><p>Node priority is configured as an <a class="link" href="Java-Broker-Management-Managing-Virtualhost-Nodes.html#Java-Broker-Management-Managing-Virtualhost-Nodes-Attributes" title="7.3.2. Attributes">attribute on the
+ virtualhost node</a> and can be changed at runtime and is effective immediately.</p><div class="important" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Important</h3><p>Use of the Never priority can lead to transaction loss. For example, consider a group
+ of three where replica-2 is marked as Never. If a transaction were to arrive and it be
+ acknowledged only by Master and Replica-2, the transaction would succeed. Replica 1 is
+ running behind for some reason (perhaps a full-GC). If a Master failure were to occur at
+ that moment, the replicas would elect Replica-1 even though Replica-2 had the most recent
+ transaction.</p><p>Transaction loss is reported by message <a class="link" href="Java-Broker-Appendix-Operation-Logging.html#Java-Broker-Appendix-Operation-Logging-Message-HA-1014">HA-1014</a>.</p></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-High-Availability-Behaviour-MinimumNumberOfNodes"></a>10.4.4. Required Minimum Number Of Nodes</h3></div></div></div><p>This controls the required minimum number of nodes to complete a transaction and to
+ elect a new master. By default, the required number of nodes is set to
+ <span class="emphasis"><em>Default</em></span> (which signifies quorum).</p><p>It is possible to reduce the required minimum number of nodes. The rationale for doing
+ this is normally to temporarily restore service from fewer than quorum nodes following an
+ extraordinary failure.</p><p>For example, consider a group of three. If one node were to fail, as quorum still
+ remained, the system would continue work without any intervention. If the failing node were
+ the master, a new master would be elected.</p><p>What if a further node were to fail? Quorum no longer remains, and the remaining node
+ would just wait. It cannot elect itself master. What if we wanted to restore service from
+ just this one node?</p><p>In this case, Required Number of Nodes can be reduced to 1 on the remain node, allowing
+ the node to elect itself and service to be restored from the singleton. Required minimum
+ number of nodes is configured as an <a class="link" href="Java-Broker-Management-Managing-Virtualhost-Nodes.html#Java-Broker-Management-Managing-Virtualhost-Nodes-Attributes" title="7.3.2. Attributes">attribute on the
+ virtualhost node</a> and can be changed at runtime and is effective immediately.</p><div class="important" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Important</h3><p>The attribute must be used cautiously. Careless use will lead to lost transactions and
+ can lead to a <a class="link" href="http://en.wikipedia.org/wiki/Split-brain_(computing)" target="_top">split-brain</a> in the event of a network partition. If used to temporarily restore
+ service from fewer than quorum nodes, it is <span class="emphasis"><em>imperative</em></span> to revert it
+ to the Default value as the failed nodes are restored.</p><p>Transaction loss is reported by message <a class="link" href="Java-Broker-Appendix-Operation-Logging.html#Java-Broker-Appendix-Operation-Logging-Message-HA-1014">HA-1014</a>.</p></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-High-Availability-Behaviour-DesignatedPrimary"></a>10.4.5. Allow to Operate Solo</h3></div></div></div><p>This attribute only applies to groups containing exactly two nodes.</p><p> In a group of two, if a node were to fail then in default configuration work will cease
+ as quorum no longer exists. A single node cannot elect itself master. </p><p>The <code class="literal">allow to operate solo</code> flag allows a node in a two node group to elect itself master and
+ to operate sole. It is configured as an <a class="link" href="Java-Broker-Management-Managing-Virtualhost-Nodes.html#Java-Broker-Management-Managing-Virtualhost-Nodes-Attributes" title="7.3.2. Attributes">attribute on the
+ virtualhost node</a> and can be changed at runtime and is effective immediately.</p><p>For example, consider a group of two where the master fails. Service will be interrupted
+ as the remaining node cannot elect itself master. To allow it to become master, apply the
+ <code class="literal">allow to operate solo</code> flag to it. It will elect itself master and work can continue, albeit
+ from one node.</p><div class="important" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Important</h3><p>It is imperative not to allow the <code class="literal">allow to operate solo</code> flag to be set on both nodes at once. To
+ do so will mean, in the event of a network partition, a <a class="link" href="http://en.wikipedia.org/wiki/Split-brain_(computing)" target="_top">split-brain</a> will
+ occur.</p><p>Transaction loss is reported by message <a class="link" href="Java-Broker-Appendix-Operation-Logging.html#Java-Broker-Appendix-Operation-Logging-Message-HA-1014">HA-1014</a>.</p></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-High-Availability-Behaviour-MaximumMessageSize"></a>10.4.6. Maximum message size</h3></div></div></div><p>
+ Internally, BDB JE HA restricts the maximum size of replication stream records passed from the master
+ to the replica(s). This helps prevent DOS attacks.
+ If expected application maximum message size is greater than 5MB, the BDB JE setting
+ <code class="literal">je.rep.maxMessageSize</code> and Qpid context variable <code class="literal">qpid.max_message_size</code>
+ needs to be adjusted to reflect this in order to avoid running into the BDB HA JE limit.
+ </p></div></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="Java-Broker-High-Availability-CreatingGroup.html">Prev</a> </td><td align="center" width="20%"><a accesskey="u" href="Java-Broker-High-Availability.html">Up</a></td><td align="right" width="40%"> <a accesskey="n" href="Java-Broker-High-Availability-NodeOperations.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">10.3. Creating a group </td><td align="center" width="20%"><a accesskey="h" href="Apache-Qpid-Broker-J-Book.html">Home</a></td><td align="right" valign="top" width="40%"> 10.5. Node Operations</td></tr></table></div></div>
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+
+ <div id="-middle-content">
+ <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">10.6. Client failover</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="Java-Broker-High-Availability-NodeOperations.html">Prev</a> </td><th align="center" width="60%">Chapter 10. High Availability</th><td align="right" width="20%"> <a accesskey="n" href="Java-Broker-High-Availability-DiskSpace.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="Java-Broker-High-Availability-ClientFailover"></a>10.6. Client failover</h2></div></div></div><p>As mentioned above, the clients need to be able to find the location of the active
+ virtualhost within the group.</p><p>Clients can do this using a static technique, for example , utilising the failover feature of the Apache Qpid
+ JMS and Apache Qpid JMS AMQP 0-x clients where the client has a list of all the nodes, and tries each node in
+ sequence until it discovers the node with the active virtualhost.</p><p>Another possibility is a dynamic technique utilising a proxy or Virtual IP (VIP). These
+ require other software and/or hardware and are outside the scope of this document.</p></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="Java-Broker-High-Availability-NodeOperations.html">Prev</a> </td><td align="center" width="20%"><a accesskey="u" href="Java-Broker-High-Availability.html">Up</a></td><td align="right" width="40%"> <a accesskey="n" href="Java-Broker-High-Availability-DiskSpace.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">10.5. Node Operations </td><td align="center" width="20%"><a accesskey="h" href="Apache-Qpid-Broker-J-Book.html">Home</a></td><td align="right" valign="top" width="40%"> 10.7. Disk space requirements</td></tr></table></div></div>
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+ <li><a id="-logotype" href="/index.html">Apache Qpid<sup>™</sup></a></li>
+ <li><a href="/documentation.html">Documentation</a></li>
+ <li><a href="/download.html">Download</a></li>
+ <li><a href="/discussion.html">Discussion</a></li>
+ </ul>
+ </div>
+
+ <div id="-menu" class="panel" style="display: none;">
+ <div class="flex">
+ <section>
+ <h3>Project</h3>
+
+ <ul>
+ <li><a href="/overview.html">Overview</a></li>
+ <li><a href="/components/index.html">Components</a></li>
+ <li><a href="/releases/index.html">Releases</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Messaging APIs</h3>
+
+ <ul>
+ <li><a href="/proton/index.html">Qpid Proton</a></li>
+ <li><a href="/components/jms/index.html">Qpid JMS</a></li>
+ <li><a href="/components/messaging-api/index.html">Qpid Messaging API</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Servers and tools</h3>
+
+ <ul>
+ <li><a href="/components/broker-j/index.html">Broker-J</a></li>
+ <li><a href="/components/cpp-broker/index.html">C++ broker</a></li>
+ <li><a href="/components/dispatch-router/index.html">Dispatch router</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Resources</h3>
+
+ <ul>
+ <li><a href="/dashboard.html">Dashboard</a></li>
+ <li><a href="https://cwiki.apache.org/confluence/display/qpid/Index">Wiki</a></li>
+ <li><a href="/resources.html">More resources</a></li>
+ </ul>
+ </section>
+ </div>
+ </div>
+
+ <div id="-search" class="panel" style="display: none;">
+ <form action="http://www.google.com/search" method="get">
+ <input type="hidden" name="sitesearch" value="qpid.apache.org"/>
+ <input type="text" name="q" maxlength="255" autofocus="autofocus" tabindex="1"/>
+ <button type="submit">Search</button>
+ <a href="/search.html">More ways to search</a>
+ </form>
+ </div>
+
+ <div id="-middle" class="panel">
+ <ul id="-path-navigation"><li><a href="/index.html">Home</a></li><li><a href="/releases/index.html">Releases</a></li><li><a href="/releases/qpid-broker-j-7.0.2/index.html">Qpid Broker-J 7.0.2</a></li><li><a href="/releases/qpid-broker-j-7.0.2/book/index.html">Apache Qpid Broker-J</a></li><li>10.3. Creating a group</li></ul>
+
+ <div id="-middle-content">
+ <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">10.3. Creating a group</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="Java-Broker-High-Availability-OverviewOfHA.html">Prev</a> </td><th align="center" width="60%">Chapter 10. High Availability</th><td align="right" width="20%"> <a accesskey="n" href="Java-Broker-High-Availability-Behaviour.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="Java-Broker-High-Availability-CreatingGroup"></a>10.3. Creating a group</h2></div></div></div><p>This section describes how to create a group. At a high level, creating a group involves
+ first creating the first node standalone, then creating subsequent nodes referencing the first
+ node so the nodes can introduce themselves and gradually the group is built up.</p><p>A group is created through either <a class="link" href="Java-Broker-Management-Channel-Web-Console.html" title="6.2. Web Management Console">Web Management</a> or the <a class="link" href="Java-Broker-Management-Channel-REST-API.html" title="6.3. REST API">REST API</a>. These instructions
+ presume you are using Web Management. To illustrate the example it builds the group
+ illustrated in figure <a class="xref" href="Java-Broker-High-Availability-OverviewOfHA.html#Java-Broker-High-Availability-OverviewOfHA-Figure" title="Figure 10.1. 3-node group deployed across three Brokers.">Figure 10.1, “3-node group deployed across three Brokers.”</a></p><div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><p>Install a Broker on each machine that will be used to host the group. As messaging
+ clients will need to be able to connect to and authentication to all Brokers, it usually
+ makes sense to choose a common authentication mechanism e.g. Simple LDAP Authentication,
+ External with SSL client authentication or Kerberos.</p></li><li class="listitem"><p>Select one Broker instance to host the first node instance. This choice is an
+ arbitrary one. The node is special only whilst creating group. Once creation is
+ complete, all nodes will be considered equal.</p></li><li class="listitem"><p>Click the <code class="literal">Add</code> button on the Virtualhost Panel on the Broker
+ tab.</p><p>
+ </p><div class="orderedlist"><ol class="orderedlist" type="a"><li class="listitem"><p>Give the Virtualhost node a unique name e.g. <code class="literal">weather1</code>. The
+ name must be unique within the group and unique to that Broker. It is best if the
+ node names are chosen from a different nomenclature than the machine names
+ themselves.</p></li><li class="listitem"><p>Choose <code class="literal">BDB_HA</code> and select <code class="literal">New group</code>
+ </p></li><li class="listitem"><p>Give the group a name e.g. <code class="literal">weather</code>. The group name must be
+ unique and will be the name also given to the virtualhost, so this is the name the
+ messaging clients will use in their connection url.</p></li><li class="listitem"><p>Give the address of this node. This is an address on this node's host that
+ will be used for replication purposes. The hostname <span class="emphasis"><em>must</em></span> be
+ resolvable by all the other nodes in the group. This is separate from the address
+ used by messaging clients to connect to the Broker. It is usually best to choose a
+ symbolic name, rather than an IP address.</p></li><li class="listitem"><p>Now add the node addresses of all the other nodes that will form the group. In
+ our example we are building a three node group so we give the node addresses of
+ <code class="literal">chaac:5000</code> and <code class="literal">indra:5000</code>.</p></li><li class="listitem"><p>Click Add to create the node. The virtualhost node will be created with the
+ virtualhost. As there is only one node at this stage, the role will be
+ master.</p></li></ol></div><p>
+ </p><div class="figure"><a id="d0e6539"></a><p class="title"><strong>Figure 10.2. Creating 1st node in a group</strong></p><div class="figure-contents"><div class="mediaobject"><img alt="Creating 1st node in a group" src="images/HA-Create-1.png" /></div></div></div><p><br class="figure-break" />
+ </p></li><li class="listitem"><p>Now move to the second Broker to be the group. Click the <code class="literal">Add</code>
+ button on the Virtualhost Panel on the Broker tab of the second Broker.</p><p>
+ </p><div class="orderedlist"><ol class="orderedlist" type="a"><li class="listitem"><p>Give the Virtualhost node a unique name e.g.
+ <code class="literal">weather2</code>.</p></li><li class="listitem"><p>Choose <code class="literal">BDB_HA</code> and choose <code class="literal">Existing group</code>
+ </p></li><li class="listitem"><p>Give the details of the <span class="emphasis"><em>existing node</em></span>. Following our
+ example, specify <code class="literal">weather</code>, <code class="literal">weather1</code> and
+ <code class="literal">thor:5000</code></p></li><li class="listitem"><p>Give the address of this node.</p></li><li class="listitem"><p>Click Add to create the node. The node will use the existing details to
+ contact it and introduce itself into the group. At this stage, the group will have
+ two nodes, with the second node in the replica role.</p></li><li class="listitem"><p>Repeat these steps until you have added all the nodes to the group.</p></li></ol></div><p>
+ </p><div class="figure"><a id="d0e6597"></a><p class="title"><strong>Figure 10.3. Adding subsequent nodes to the group</strong></p><div class="figure-contents"><div class="mediaobject"><img alt="Adding subsequent nodes to the group" src="images/HA-Create-2.png" /></div></div></div><p><br class="figure-break" />
+ </p></li></ol></div><p>The group is now formed and is ready for us. Looking at the virtualhost node of any of the
+ nodes shows a complete view of the whole group. </p><div class="figure"><a id="d0e6609"></a><p class="title"><strong>Figure 10.4. View of group from one node</strong></p><div class="figure-contents"><div class="mediaobject"><img alt="View of group from one node" src="images/HA-Create-3.png" /></div></div></div><p><br class="figure-break" /></p></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="Java-Broker-High-Availability-OverviewOfHA.html">Prev</a> </td><td align="center" width="20%"><a accesskey="u" href="Java-Broker-High-Availability.html">Up</a></td><td align="right" width="40%"> <a accesskey="n" href="Java-Broker-High-Availability-Behaviour.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">10.2. High Availability Overview </td><td align="center" width="20%"><a accesskey="h" href="Apache-Qpid-Broker-J-Book.html">Home</a></td><td align="
right" valign="top" width="40%"> 10.4. Behaviour of the Group</td></tr></table></div></div>
+
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+
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+ <li><a href="/components/broker-j/index.html">Broker-J</a></li>
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+
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+
+ <div id="-middle-content">
+ <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">10.7. Disk space requirements</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="Java-Broker-High-Availability-ClientFailover.html">Prev</a> </td><th align="center" width="60%">Chapter 10. High Availability</th><td align="right" width="20%"> <a accesskey="n" href="Java-Broker-High-Availability-Network-Requirements.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="Java-Broker-High-Availability-DiskSpace"></a>10.7. Disk space requirements</h2></div></div></div><p>In the case where node in a group are down, the master must keep the data they are missing
+ for them to allow them to return to the replica role quickly.</p><p>By default, the master will retain up to 1hour of missed transactions. In a busy
+ production system, the disk space occupied could be considerable.</p><p>This setting is controlled by virtualhost context variable
+ <code class="literal">je.rep.repStreamTimeout</code>.</p></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="Java-Broker-High-Availability-ClientFailover.html">Prev</a> </td><td align="center" width="20%"><a accesskey="u" href="Java-Broker-High-Availability.html">Up</a></td><td align="right" width="40%"> <a accesskey="n" href="Java-Broker-High-Availability-Network-Requirements.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">10.6. Client failover </td><td align="center" width="20%"><a accesskey="h" href="Apache-Qpid-Broker-J-Book.html">Home</a></td><td align="right" valign="top" width="40%"> 10.8. Network Requirements</td></tr></table></div></div>
+
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+ <li><a href="/proton/index.html">Qpid Proton</a></li>
+ <li><a href="/components/jms/index.html">Qpid JMS</a></li>
+ <li><a href="/components/messaging-api/index.html">Qpid Messaging API</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Servers and tools</h3>
+
+ <ul>
+ <li><a href="/components/broker-j/index.html">Broker-J</a></li>
+ <li><a href="/components/cpp-broker/index.html">C++ broker</a></li>
+ <li><a href="/components/dispatch-router/index.html">Dispatch router</a></li>
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+
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+ <ul id="-path-navigation"><li><a href="/index.html">Home</a></li><li><a href="/releases/index.html">Releases</a></li><li><a href="/releases/qpid-broker-j-7.0.2/index.html">Qpid Broker-J 7.0.2</a></li><li><a href="/releases/qpid-broker-j-7.0.2/book/index.html">Apache Qpid Broker-J</a></li><li>10.8. Network Requirements</li></ul>
+
+ <div id="-middle-content">
+ <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">10.8. Network Requirements</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="Java-Broker-High-Availability-DiskSpace.html">Prev</a> </td><th align="center" width="60%">Chapter 10. High Availability</th><td align="right" width="20%"> <a accesskey="n" href="Java-Broker-High-Availability-Security.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="Java-Broker-High-Availability-Network-Requirements"></a>10.8. Network Requirements</h2></div></div></div><p>The HA Cluster performance depends on the network bandwidth, its use by existing traffic,
+ and quality of service.</p><p>In order to achieve the best performance it is recommended to use a separate network
+ infrastructure for the Qpid HA Nodes which might include installation of dedicated network
+ hardware on Broker hosts, assigning a higher priority to replication ports, installing a group
+ in a separate network not impacted by any other traffic.</p></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="Java-Broker-High-Availability-DiskSpace.html">Prev</a> </td><td align="center" width="20%"><a accesskey="u" href="Java-Broker-High-Availability.html">Up</a></td><td align="right" width="40%"> <a accesskey="n" href="Java-Broker-High-Availability-Security.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">10.7. Disk space requirements </td><td align="center" width="20%"><a accesskey="h" href="Apache-Qpid-Broker-J-Book.html">Home</a></td><td align="right" valign="top" width="40%"> 10.9. Security</td></tr></table></div></div>
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