82 lines
5.7 KiB
HTML
82 lines
5.7 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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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Fast Response Cache Accelerator (FRCA) for HTTP Server (powered by Apache)" />
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<meta name="abstract" content="This topic provides information on the Fast Response Cache Accelerator." />
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<meta name="description" content="This topic provides information on the Fast Response Cache Accelerator." />
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<meta name="DC.Relation" scheme="URI" content="rzaieconcepts.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2002,2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2002,2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzaieconfrca" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Fast Response Cache Accelerator (FRCA) for HTTP Server (powered by
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Apache)</title>
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</head>
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<body id="rzaieconfrca"><a name="rzaieconfrca"><!-- --></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">Fast Response Cache Accelerator (FRCA) for HTTP Server (powered by
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Apache)</h1>
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<div><p>This topic provides information on the Fast Response Cache Accelerator.</p>
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<div class="important"><span class="importanttitle">Important:</span> Information
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for this topic supports the latest PTF levels for HTTP Server for i5/OS .
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It is recommended that you install the latest PTFs to upgrade to the latest
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level of the HTTP Server for i5/OS. Some of the topics documented here are
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not available prior to this update. See <a href="http://www-03.ibm.com/servers/eserver/iseries/software/http/services/service.html" target="_blank">http://www.ibm.com/servers/eserver/iseries/software/http/services/service.htm</a> <img src="www.gif" alt="Link outside Information Center" /> for more information. </div>
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<p>Fast Response Cache Acceleration is only available for V5R2 HTTP Server
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and later releases.</p>
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<p>The Fast Response Cache Accelerator (FRCA) improves the performance and
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scale of Web and TCP server applications by storing both static
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and dynamic content in a memory-based cache located in the Licensed Internal
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Code. You can configure FRCA by using the <span>IBM<sup>®</sup> Web Administration for i5/OS™ interface</span>.
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See <a href="rzaiesetfrca.htm">Set up Fast Response Cache Accelerator (FRCA) for HTTP Server (powered by Apache)</a>.</p>
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<p>FRCA improves efficiency, scale, and performance by implementing two concepts:</p>
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<ul><li><strong>Use of a memory-based cache that filters what is stored and what is
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dismissed</strong>. Requests can process much more quickly when the majority of
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the requested content is cached within the Licensed Internal Code. The memory-based
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cache delegates stored information to the Network File Cache which is located
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in the Licensed Internal Code.</li>
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<li><strong>Caching functions from within the Licensed Internal Code to reduce
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request processing time</strong>. Storing cached files within the Licensed Internal
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Code eliminates overhead and reduces request processing time by reducing task-switching
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between the Licensed Internal Code and user application layers. This conserves
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system resources allowing them to be reallocated towards hosting dynamic content. </li>
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</ul>
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<div class="note"><span class="notetitle">Note:</span> The HTTP Server (powered by Apache) does not check for authorization
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on content served from FRCA. Use FRCA to cache content that does not need
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to be secured or accessed through specific validation.</div>
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<p><strong>FRCA improves HTTP Server (powered by Apache) performance for both static
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and dynamic content. </strong></p>
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<p>Static content, or content that comes from a file, is stored in Network
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File Cache and is then served to Licensed Internal Code of HTTP Server (powered
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by Apache) which essentially 'short circuits' the normal request processing
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path so the requested information will reach the user faster.</p>
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<p>Dynamic content can be served from a Licensed Internal Code proxy cache
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or distributed by the Licensed Internal Code reverse proxy to one or more
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remote servers. A layer-7 router looks at the URL paths to route dynamic
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requests to the appropriate remote server.</p>
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<p><strong>Static content request and response process <u>without</u> FRCA</strong></p>
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<p><br /><img src="rzal8514.gif" alt="The request and respond process without using FRCA." /><br /></p>
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<p><strong>Static content request and response process <u>with</u> FRCA</strong></p>
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<p><br /><img src="rzal8515.gif" alt="The request and responce process using FRCA." /><br /></p>
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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="rzaieconcepts.htm" title="This topic provides concepts of functions on HTTP Server and IBM Web Administration for i5/OS interface.">Concepts of functions of HTTP Server</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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