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<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xml:lang="en" lang="en" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html;charset=utf-8" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <!-- MOTW-DISABLED saved from url=(0014)about:internet --> <title>Support for Oracle RAC</title> <link rel="StyleSheet" href="css/oraclecli.css" type="text/css" media="all" /> <link rel="StyleSheet" href="css/webworks.css" type="text/css" media="all" /> <script type="text/javascript" language="JavaScript1.2" src="wwhdata/common/context.js"></script> <script type="text/javascript" language="JavaScript1.2" src="wwhdata/common/towwhdir.js"></script> <script type="text/javascript" language="JavaScript1.2" src="wwhdata/common/wwhpagef.js"></script> <script type="text/javascript" language="JavaScript1.2"> <!-- var WebWorksRootPath = ""; // --> </script> <script type="text/javascript" language="JavaScript1.2"> <!-- // Set reference to top level help frame // var WWHFrame = WWHGetWWHFrame("", true); // --> </script> <script type="text/javascript" language="JavaScript1.2" src="scripts/expand.js"></script> </head> <body class="" style="background-color: #FFFFEE;" onload="WWHUpdate();" onunload="WWHUnload();" onkeydown="WWHHandleKeyDown((document.all||document.getElementById||document.layers)?event:null);" onkeypress="WWHHandleKeyPress((document.all||document.getElementById||document.layers)?event:null);" onkeyup="WWHHandleKeyUp((document.all||document.getElementById||document.layers)?event:null);"> <br /> <div class="WebWorks_Breadcrumbs" style="text-align: left;"> <a class="WebWorks_Breadcrumb_Link" href="oraclecli.17.01.html#559151">13 The Oracle Driver </a> : Support for Oracle RAC</div> <hr align="left" /> <blockquote> <div class="head_1"><a name="559151">Support for Oracle RAC</a></div> <div class="Body"><a name="559152">Oracle introduced Real Application Clusters (RAC) with Oracle 9</a><span class="Emphasis">i</span>, and RAC is also a key feature of Oracle 10<span class="Emphasis">g</span>. Oracle RAC allows a single physical Oracle database to be accessed by concurrent instances of Oracle running across several different CPUs. </div> <div class="Body"><a name="559153">An Oracle RAC is composed of a group of independent servers, or nodes, that cooperate as </a>a single system. A cluster architecture such as this provides applications access to more computing power when needed, while allowing computing resources to be used for other applications when database resources are not as heavily required. For example, in the event of a sudden increase in network traffic, an Oracle RAC can distribute the load over many nodes, a feature referred to as <span class="Emphasis">server load balancing</span>. Oracle RAC features are available to you simply by connecting to an Oracle RAC system with a DataDirect Connect Series <span class="forbody">for</span> <span class="APIbody">ODBC</span> driver. There is no additional configuration required.</div> <div class="Body"><a name="559154">C</a><span class="Emphasis">onnection failover</span> and <span class="Emphasis">client load balancing</span> can be used in conjunction with an Oracle RAC system, but they are not specifically part of Oracle RAC. See <span class="Cross_ref_"><a href="javascript:WWHClickedPopup('ODBC', 'advanced.06.2.html#106175', '');">â??Using Failoverâ??</a></span> for details about how these features work in DataDirect Connect Series <span class="forbody">for</span> <span class="APIbody">ODBC</span> drivers.</div> <script type="text/javascript" language="JavaScript1.2"> <!-- // Clear related topics // WWHClearRelatedTopics(); document.writeln(WWHRelatedTopicsInlineHTML()); // --> </script> </blockquote> <script type="text/javascript" language="JavaScript1.2"> <!-- document.write(WWHRelatedTopicsDivTag() + WWHPopupDivTag() + WWHALinksDivTag()); // --> </script> </body> </html>
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