85 lines
5.6 KiB
HTML
85 lines
5.6 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<meta name="DC.Title" content="Communications requirements for clusters" />
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<meta name="abstract" content="Use any type of communications media in your clustering environment as long as it supports Internet Protocol (IP)." />
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<meta name="description" content="Use any type of communications media in your clustering environment as long as it supports Internet Protocol (IP)." />
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<title>Communications requirements for clusters</title>
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</head>
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<body id="rzaigplancommunications"><a name="rzaigplancommunications"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Communications requirements for clusters</h1>
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<div><p>Use any type of communications media in your clustering environment
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as long as it supports Internet Protocol (IP).</p>
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<p>Cluster resource services uses only TCP/IP protocols to communicate between
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nodes. Local area networks (LANs), wide area networks (WANs), OptiConnect
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system area networks (SANs), or any combination of these connectivity devices
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are supported. Your choice should be based on the following factors:</p>
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<ul><li>Volume of transactions</li>
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<li>Response time requirements</li>
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<li>Distance between the nodes</li>
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<li>Cost considerations</li>
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</ul>
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<p>You can use these same considerations when determining the connection media
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to be used to connect primary and backup locations of resources. When planning
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your cluster, it is recommended that you designate one or more of your backup
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nodes in remote locations in order to survive a site loss disaster.</p>
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<p>To avoid performance problems that might be caused by inadequate capacity,
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you need to evaluate the communication media that is used to handle the volumes
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of information that is sent from node to node. You can choose which physical
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media you prefer to use such as token ring, Ethernet, asynchronous transfer
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mode (ATM), SPD OptiConnect, High-Speed Link (HSL) OptiConnect, or Virtual
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OptiConnect (a high-speed internal connection between logical partitions).</p>
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<p>HSL OptiConnect is a technology provided by OptiConnect for <span class="keyword">i5/OS™</span> software
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(<span class="keyword">i5/OS</span> Option 23 - <span class="keyword">i5/OS</span> OptiConnect). It can be used
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to construct highly available solutions. HSL OptiConnect is a system area
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network that provides high-speed, point-to-point connectivity between cluster
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nodes by using High Speed Link (HSL) Loop technology. HSL OptiConnect requires
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standard HSL cables, but no additional hardware.</p>
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<p>For switchable hardware, also referred to as resilient device CRGs, you
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need to have an independent disk pool that is switchable in your environment.
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In a logical partition environment, this is a collection of disk units that
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are on the bus that is being shared by the logical partitions, or that are
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attached to an input/output processor that has been assigned to an I/O pool.
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For a multi-system environment, this is one or more switchable expansion units
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(towers) properly configured on the HSL loop also containing the systems in
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the recovery domain. The switchable tower can also be used in an LPAR environment.
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For more planning information about switchable hardware and independent disk
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pools, see <a href="../rzaly/rzalyplan.htm"> Plan
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for independent disk pools</a>.</p>
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<div class="note"><span class="notetitle">Note:</span> If you are using 2810 LAN adapters using <strong>only</strong> TCP/IP, and not
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using Systems Network Architecture (SNA) or IPX, you can increase your adapter
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performance on a V4R5M0 server by specifying Enable only for TCP(*YES) for
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your specific line description using the <a href="../cl/wrklind.htm"><span class="cmdname">Work with Line Descriptions (WRKLIND)</span> command</a>.
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Enable only for TCP(*YES) is set automatically in V5R1M0 and later releases.</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaigplanrequirements.htm" title="Outlines the hardware, software, and communications requirements for using clusters.">Cluster requirements</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../rzau3/rzau3kickoff.htm">OptiConnect for i5/OS</a></div>
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</div>
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</div>
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</body>
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</html>
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