66 lines
4.6 KiB
HTML
66 lines
4.6 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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<head>
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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="Customize the journal recovery count" />
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<meta name="abstract" content="Use the Journal Recovery Count (JRNRCYCNT) parameter in the CHGJRN command to set the journal recovery ratio for each journal." />
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<meta name="description" content="Use the Journal Recovery Count (JRNRCYCNT) parameter in the CHGJRN command to set the journal recovery ratio for each journal." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2004, 2006" />
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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>Customize the journal recovery count</title>
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</head>
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<body id="rzakiadjrcryratio"><a name="rzakiadjrcryratio"><!-- --></a>
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<img src="./delta.gif" alt="Start of change" /><!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Customize the journal recovery count</h1>
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<div><p>Use the Journal Recovery Count (JRNRCYCNT) parameter in the CHGJRN
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command to set the journal recovery ratio for each journal. </p>
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<p> This parameter will indicate how many journal entries can exist between
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the last deposited entry and the oldest forced entry for a journaled object.
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A value between 10,000 and 2,000,000,000 will be allowed. A value of *SYSDFT
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will also be allowed to reset the journal’s recovery count to the system default
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journal recovery count.</p>
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<p>The journal recovery count allows you to choose between faster abnormal
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IPL recovery and decreased run time processing. Specifying a smaller value
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decreases the number of changes that would need to be recovered from this
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journal during an abnormal IPL by increasing the frequency with which changed
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objects are forced. Specifying a larger value increases the number of changes
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that would need to be recovered for this journal during an abnormal IPL by
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decreasing the frequency with which changed objects are forced. </p>
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<p><strong>Note: </strong>Changing the journal recovery count value may affect overall
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system performance as it affects the utilization of auxiliary storage devices.</p>
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<p>The WRKJRNA command indicates the Journal Recovery Count on the panel display
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and in the printed output. A value of *SYSDFT displays if the system default
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journal recovery count is being used. All journals are created with the system
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default journal recovery count, and if a value other than the system default
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(*SYSDFT) is specified, the system default journal recovery count will no
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longer be in effect for the journal. The <a href="../apis/QJORJRNI.htm">Retrieve Journal Information API</a> will also return the
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Journal Recovery Count.</p>
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<p><img src="./delta.gif" alt="Start of change" />The operating system is shipped with a system default journal
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recovery count of 250,000. The QJOCHRVC API changes the system
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default journal recovery count for all newly created journals on the system
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and all existing journals that have the system default (*SYSDFT) specified
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for their journal recovery count. <img src="./deltaend.gif" alt="End of change" /></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="rzakiplnjrnsu.htm" title="The following topics provide information to plan configuration for journals. They provide information about each option that you can select for journal.">Plan setup for journals</a></div>
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</div>
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</div>
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<img src="./deltaend.gif" alt="End of change" /></body>
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</html>
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