<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Chapter 11. Protecting Your Data - STONITH</title><link rel="stylesheet" href="./Common_Content/css/default.css" type="text/css" /><meta name="generator" content="publican 1.6" /><meta name="package" content="Pacemaker-Pacemaker_Explained-1.1-en-US-1-0" /><link rel="home" href="index.html" title="Configuration Explained" /><link rel="up" href="index.html" title="Configuration Explained" /><link rel="prev" href="ch10s03s03s09.html" title="10.3.3.9. Proper Interpretation of Notification Environment Variables" /><link rel="next" href="s-stonith-choose.html" title="11.2. What STONITH Device Should You Use" /></head><body class=""><p id="title"><a class="left" href="https://fedorahosted.org/publican"><img src="Common_Content/images/image_left.png" alt="Product Site" /></a><a class="right" href="https://fedorahosted.org/publican"><img src="Common_Content/images/image_right.png" alt="Documentation Site" /></a></p><ul class="docnav"><li class="previous"><a accesskey="p" href="ch10s03s03s09.html"><strong>Prev</strong></a></li><li class="next"><a accesskey="n" href="s-stonith-choose.html"><strong>Next</strong></a></li></ul><div xml:lang="en-US" class="chapter" title="Chapter 11. Protecting Your Data - STONITH" lang="en-US"><div class="titlepage"><div><div><h2 class="title" id="ch-stonith">Chapter 11. Protecting Your Data - STONITH</h2></div></div></div><div class="toc"><dl><dt><span class="section"><a href="ch-stonith.html#s-stonith-why">11.1. Why You Need STONITH</a></span></dt><dt><span class="section"><a href="s-stonith-choose.html">11.2. What STONITH Device Should You Use</a></span></dt><dt><span class="section"><a href="s-stonith-configure.html">11.3. Configuring STONITH</a></span></dt><dd><dl><dt><span class="section"><a href="s-stonith-configure.html#s-stonith-example">11.3.1. Example</a></span></dt></dl></dd></dl></div><div class="section" title="11.1. Why You Need STONITH"><div class="titlepage"><div><div><h2 class="title" id="s-stonith-why">11.1. Why You Need STONITH</h2></div></div></div><div class="para"> <a href="http://en.wikipedia.org/wiki/STONITH">STONITH</a> is an acronym for Shoot-The-Other-Node-In-The-Head and it protects your data from being corrupted by rouge nodes or concurrent access. </div><div class="para"> Just because a node is unresponsive, this doesn't mean it isn't accessing your data. The only way to be 100% sure that your data is safe, is to use STONITH so we can be certain that the node is truly offline, before allowing the data to be accessed from another node. </div><div class="para"> STONITH also has a role to play in the event that a clustered service cannot be stopped. In this case, the cluster uses STONITH to force the whole node offline, thereby making it safe to start the service elsewhere. </div></div></div><ul class="docnav"><li class="previous"><a accesskey="p" href="ch10s03s03s09.html"><strong>Prev</strong>10.3.3.9. Proper Interpretation of Notification E...</a></li><li class="up"><a accesskey="u" href="#"><strong>Up</strong></a></li><li class="home"><a accesskey="h" href="index.html"><strong>Home</strong></a></li><li class="next"><a accesskey="n" href="s-stonith-choose.html"><strong>Next</strong>11.2. What STONITH Device Should You Use</a></li></ul></body></html>
