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diff --git a/_released_docs/r3.8.1/zookeeperHierarchicalQuorums.html b/_released_docs/r3.8.1/zookeeperHierarchicalQuorums.html new file mode 100644 index 000000000..9f3b6c6bb --- /dev/null +++ b/_released_docs/r3.8.1/zookeeperHierarchicalQuorums.html @@ -0,0 +1,197 @@ + +<!DOCTYPE html> +<html> +<head> + <META http-equiv="Content-Type" content="text/html; charset=UTF-8"> + <title>ZooKeeper: Because Coordinating Distributed Systems is a Zoo</title> + <link type="text/css" href="skin/basic.css" rel="stylesheet"> + <link media="screen" type="text/css" href="skin/screen.css" rel="stylesheet"> + <link media="print" type="text/css" href="skin/print.css" rel="stylesheet"> + <link type="text/css" href="skin/profile.css" rel="stylesheet"> + <script src="skin/getBlank.js" language="javascript" type="text/javascript"></script> + <script src="skin/getMenu.js" language="javascript" type="text/javascript"></script> + <script src="skin/init.js" language="javascript" type="text/javascript"></script> + <link rel="shortcut icon" href="images/favicon.ico"> +</head> +<body onload="init();"> +<div id="top"> + <div class="breadtrail"> + <a href="http://www.apache.org/">Apache</a> > <a href="http://zookeeper.apache.org/">ZooKeeper</a> + </div> + <div class="header"> + <div class="projectlogo"> + <a href="http://zookeeper.apache.org/"><img class="logoImage" alt="ZooKeeper" src="images/zookeeper_small.gif" title="ZooKeeper: distributed coordination"></a> + </div> + <div class="searchbox"> + <form action="http://www.google.com/search" method="get"> + <input value="zookeeper.apache.org" name="sitesearch" type="hidden"><input onFocus="getBlank (this, 'Search the site with google');" size="25" name="q" id="query" type="text" value="Search the site with google"> + <input name="Search" value="Search" type="submit"> + </form> + </div> + <ul id="tabs"> + <li> + <a class="unselected" href="http://zookeeper.apache.org/">Project</a> + </li> + <li> + <a class="unselected" href="https://cwiki.apache.org/confluence/display/ZOOKEEPER/">Wiki</a> + </li> + <li class="current"> + <a class="selected" href="index.html">ZooKeeper 3.8 Documentation</a> + </li> + </ul> + </div> +</div> +<div id="main"> + <div id="publishedStrip"> + <div id="level2tabs"></div> + <script type="text/javascript"><!-- +document.write("Last Published: " + document.lastModified); +// --></script> + </div> + <div class="breadtrail"> + + </div> + <div id="menu"> + <div onclick="SwitchMenu('menu_1', 'skin/')" id="menu_1Title" class="menutitle">Overview</div> + <div id="menu_1" class="menuitemgroup"> + <div class="menuitem"> + <a href="index.html">Welcome</a> + </div> + <div class="menuitem"> + <a href="zookeeperOver.html">Overview</a> + </div> + <div class="menuitem"> + <a href="zookeeperStarted.html">Getting Started</a> + </div> + <div class="menuitem"> + <a href="releasenotes.html">Release Notes</a> + </div> + </div> + <div onclick="SwitchMenu('menu_2', 'skin/')" id="menu_2Title" class="menutitle">Developer</div> + <div id="menu_2" class="menuitemgroup"> + <div class="menuitem"> + <a href="apidocs/zookeeper-server/index.html">API Docs</a> + </div> + <div class="menuitem"> + <a href="zookeeperProgrammers.html">Programmer's Guide</a> + </div> + <div class="menuitem"> + <a href="zookeeperUseCases.html">Use Cases</a> + </div> + <div class="menuitem"> + <a href="javaExample.html">Java Example</a> + </div> + <div class="menuitem"> + <a href="zookeeperTutorial.html">Barrier and Queue Tutorial</a> + </div> + <div class="menuitem"> + <a href="recipes.html">Recipes</a> + </div> + </div> + <div onclick="SwitchMenu('menu_3', 'skin/')" id="menu_3Title" class="menutitle">Admin & Ops</div> + <div id="menu_3" class="menuitemgroup"> + <div class="menuitem"> + <a href="zookeeperAdmin.html">Administrator's Guide</a> + </div> + <div class="menuitem"> + <a href="zookeeperQuotas.html">Quota Guide</a> + </div> + <div class="menuitem"> + <a href="zookeeperJMX.html">JMX</a> + </div> + <div class="menuitem"> + <a href="zookeeperHierarchicalQuorums.html">Hierarchical Quorums</a> + </div> + <div class="menuitem"> + <a href="zookeeperOracleQuorums.html">Oracle Quorum</a> + </div> + <div class="menuitem"> + <a href="zookeeperObservers.html">Observers Guide</a> + </div> + <div class="menuitem"> + <a href="zookeeperReconfig.html">Dynamic Reconfiguration</a> + </div> + <div class="menuitem"> + <a href="zookeeperCLI.html">ZooKeeper CLI</a> + </div> + <div class="menuitem"> + <a href="zookeeperTools.html">ZooKeeper Tools</a> + </div> + <div class="menuitem"> + <a href="zookeeperMonitor.html">ZooKeeper Monitor</a> + </div> + <div class="menuitem"> + <a href="zookeeperAuditLogs.html">Audit Logs</a> + </div> + </div> + <div onclick="SwitchMenu('menu_4', 'skin/')" id="menu_4Title" class="menutitle">Contributor</div> + <div id="menu_4" class="menuitemgroup"> + <div class="menuitem"> + <a href="zookeeperInternals.html">ZooKeeper Internals</a> + </div> + </div> + <div onclick="SwitchMenu('menu_5', 'skin/')" id="menu_5Title" class="menutitle">Miscellaneous</div> + <div id="menu_5" class="menuitemgroup"> + <div class="menuitem"> + <a href="https://cwiki.apache.org/confluence/display/ZOOKEEPER">Wiki</a> + </div> + <div class="menuitem"> + <a href="https://cwiki.apache.org/confluence/display/ZOOKEEPER/FAQ">FAQ</a> + </div> + <div class="menuitem"> + <a href="http://zookeeper.apache.org/mailing_lists.html">Mailing Lists</a> + </div> + </div> + </div> + <div id="content"> +<!-- +Copyright 2002-2004 The Apache Software Foundation + +Licensed 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. +//--> +<h1>Introduction to hierarchical quorums</h1> +<p>This document gives an example of how to use hierarchical quorums. The basic idea is very simple. First, we split servers into groups, and add a line for each group listing the servers that form this group. Next we have to assign a weight to each server.</p> +<p>The following example shows how to configure a system with three groups of three servers each, and we assign a weight of 1 to each server:</p> +<pre><code>group.1=1:2:3 +group.2=4:5:6 +group.3=7:8:9 + +weight.1=1 +weight.2=1 +weight.3=1 +weight.4=1 +weight.5=1 +weight.6=1 +weight.7=1 +weight.8=1 +weight.9=1 +</code></pre> +<p>When running the system, we are able to form a quorum once we have a majority of votes from a majority of non-zero-weight groups. Groups that have zero weight are discarded and not considered when forming quorums. Looking at the example, we are able to form a quorum once we have votes from at least two servers from each of two different groups.</p> +</div> +<div class="clearboth"> </div> +</div> +<div id="footer"> + <div class="lastmodified"> + <script type="text/javascript"> + <!-- + document.write("Last Published: " + document.lastModified); + // --> + </script> + </div> + <div class="copyright"> + Copyright © <a href="http://www.apache.org/licenses/">The Apache Software Foundation.</a> + </div> + <div id="logos"></div> +</div> +</body> +</html>
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