84 lines
4.7 KiB
HTML
84 lines
4.7 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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<meta name="DC.Type" content="task" />
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<meta name="DC.Title" content="Example: Reduce save-outage time for two libraries" />
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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>Example: Reduce save-outage time for two libraries</title>
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</head>
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<body id="rzaiu345"><a name="rzaiu345"><!-- --></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">Example: Reduce save-outage time for two libraries</h1>
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<div><div class="section"> <p>This example makes use of two libraries, LIB1 and LIB2. Both
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libraries contain objects that you will save on a daily basis. Your current
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save strategy ends jobs that make changes to the objects in the two libraries
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for the entire time that the you are saving the libraries.</p>
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<p>For this
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example, objects of any type can exist in the two libraries. The objects that
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exist in the two libraries may or may not be journaled.</p>
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<p>The several
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hour save-outage time can be greatly reduced by the following steps: </p>
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</div>
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<ol><li class="stepexpand"><span>End all application jobs that are making updates to the objects
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in libraries LIB1 and LIB2.</span></li>
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<li class="stepexpand"><span></span> Submit the following command as an individual batch
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job:
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<pre>SAVLIB LIB(LIB1 LIB2) DEV(TAP01) SAVACT(*SYNCLIB) +
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SAVACTMSGQ(QSYSOPR) +
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ACCPTH(*YES)</pre>
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<div class="note"><span class="notetitle">Note:</span> You could also use the SAVOBJ or SAVCHGOBJ commands depending on your
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specific needs.</div>
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<p>The objects in library LIB1 and LIB2 reach a checkpoint together, as specified
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by SAVACT(*SYNCLIB), and the server saves the libraries to TAP01. The server
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sends the message indicating that checkpoint processing is complete to QSYSOPR.</p>
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<p>You are also saving access paths for the logical files, as specified by
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ACCPTH(*YES). If you specify this, the access paths, in most cases, will not
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need to be built after restoring the files from this save media.</p>
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<p>A single save command saves the libraries to provide a consistent checkpoint.
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This is also faster than saving both libraries to the same storage device
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with separate commands. Using two save commands to two separate media devices
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allows the server to perform the checkpoint processing for the libraries concurrently.
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It may also allow the server to perform checkpoint processing faster than
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saving both libraries with a single save command.</p>
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</li>
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<li class="stepexpand"><span>After checkpoint processing is complete, the message queue QSYSOPR
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receives the message CPI3712. If checkpoint processing does not complete for
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the objects, message queue receives the message CPI3711 and the save operation
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ends.</span></li>
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<li class="stepexpand"><span>After receiving CPI3712 message, start the application jobs that
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make updates to the objects in the two libraries.</span></li>
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</ol>
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<div class="section"> <p>The objects exist on the media as they were at the time the application
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jobs were ended, prior to the save command being run. However, the save-while-active
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function greatly reduces the amount of time that the applications are not
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available.</p>
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</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="rzaiurzaiu344.htm" title="Use the save-while-active function to reduce your save-outage time. This is the easiest way to use the save-while-active function.">Reduce your save-outage time</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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