79 lines
5.5 KiB
HTML
79 lines
5.5 KiB
HTML
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Enabling a power-handling program to control system activity during a power interruption" />
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<meta name="abstract" content="System software support is essentially the same for both the battery feature and the uninterruptible power supply attachment." />
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<title>Enabling a power-handling program to control system activity during
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a power interruption</title>
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</head>
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<body id="rzahrphpgmco"><a name="rzahrphpgmco"><!-- --></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">Enabling a power-handling program to control system activity during
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a power interruption</h1>
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<div><p>System software support is essentially the same for both the battery
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feature and the uninterruptible power supply attachment.</p>
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<div class="p">In some environments you may want to perform different actions when the
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uninterruptible power supply begins supplying power to the system or when
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power is fluctuating. A power-handling program can use any of the following
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methods to handle these situations: <ul><li>Sending specific messages to interactive users</li>
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<li>Ending batch jobs and subsystems in preparation for powering down</li>
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<li>Dynamically changing the system values that control uninterruptible power
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supply processing</li>
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<li>Issuing the PWRDWNSYS command to shut down the system</li>
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</ul>
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</div>
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<p>To specify that you have power handling programs, change the QUPSMSGQ system
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value to the name of a queue you have created. The system will send the same
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messages to both QSYSOPR and the queue you specified. Change the QUPSDLYTIM
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system value to *NOMAX.</p>
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<p>The program you use to handle the message queue must be active and must
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allocate the queue. If a program has not allocated the queue that is specified
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in QUPSMSGQ, the system will assume that no power handling program
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exists.</p>
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</div>
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<div>
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<ol>
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<li class="olchildlink"><a href="rzahrimpgmpi.htm">Implementing a power-handling program</a><br />
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<span><img src="./delta.gif" alt="Start of change" />This topic highlights what you need to do to use
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a power-handling program for a system when a full uninterruptible power supply
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is attached.<img src="./deltaend.gif" alt="End of change" /></span></li>
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<li class="olchildlink"><a href="rzahrwrtpgmco.htm">Writing a power-handling program</a><br />
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A power-handling program should be activated at each IPL and remain active at all times. It should be accounted for in the activity level available in work management subsystem specifications.</li>
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</ol>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzahrovrvwco.htm" title="A power-handling power program, when used with power protection devices, can minimize interruption during a power loss situation.">Control server shutdown using a power-handling program</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzahrmsgqco.htm" title="The Uninterruptible Power Supply Message Queue (QUPSMSGQ) system value determines which message queues the power supply messages are sent to.">Uninterruptible Power Supply Message queue system value (QUPSMSGQ)</a></div>
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<div><a href="rzahrdlytimco.htm" title="QUPSDLYTIM is the system value for the Uninterruptible power supply delay timer.">Uninterruptible power supply delay time system value (QUPSDLYTIM)</a></div>
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<div><a href="rzahrnopgmco.htm" title="Use this topic to learn about considerations when you are not a power-handling program to handle controlled system shutdown.">Handling uninterruptible power supply conditions when no power-handling program exists</a></div>
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</div>
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</div>
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</body>
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