74 lines
5.7 KiB
HTML
74 lines
5.7 KiB
HTML
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<!DOCTYPE html
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="The controlling subsystem" />
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<meta name="abstract" content="The controlling subsystem is the interactive subsystem that starts automatically when the system starts, and it is the subsystem through which the system operator controls the system via the system console. It is identified in the Controlling subsystem/library (QCTLSBSD) system value." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004-2006" />
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<title>The controlling subsystem </title>
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</head>
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<body id="rzakscontrollingsbs"><a name="rzakscontrollingsbs"><!-- --></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">The controlling subsystem </h1>
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<div><p>The controlling subsystem is the interactive subsystem that starts
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automatically when the system starts, and it is the subsystem through which
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the system operator controls the system via the system console. It is identified
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in the Controlling subsystem/library (QCTLSBSD) system value. </p>
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<p>IBM<sup>®</sup> supplies
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two complete controlling subsystem descriptions: QBASE (the default controlling
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subsystem) and QCTL. Only one controlling subsystem can be active on the system
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at any time.</p>
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<p>When the system is in the restricted condition, most of the activity on
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the system has ended, and only one workstation is active. The system must
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be in this condition for commands such as Save System (<span class="cmdname">SAVSYS</span>)
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or Reclaim Storage (<span class="cmdname">RCLSTG</span>) to run. Some programs for diagnosing
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equipment problems also require the system to be in a restricted condition.
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To end this condition, you must start the controlling subsystem again.</p>
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<div class="p"><div class="note"><span class="notetitle">Note:</span> There is also a batch restricted state in which one batch job can
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be active.</div>
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</div>
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<p>When all of the subsystems, including the controlling subsystem are ended,
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a restricted condition is created. You can end each subsystem individually
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or you can use the ENDSBS SBS(*ALL) OPTION(*IMMED).</p>
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<div class="important"><span class="importanttitle">Important:</span> The system cannot reach the restricted
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state until there is only one job remaining in the controlling subsystem.
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Sometimes it may appear as though there is a single job remaining, but the
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system does not go into the restricted state. In this case you need to verify
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that there are no suspended system request jobs, suspended group jobs, or
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disconnected jobs on the remaining active display. Use the Work with Active
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Jobs (<span class="cmdname">WRKACTJOB</span>) command and press F14=Include to display
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any suspended or disconnected jobs. If these jobs exist, you need to end them
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in order for the system to reach the restricted state. The ENDSYS and ENDSBS
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functions will send a CPI091C information message to the command issuer when
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this condition is detected.</div>
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</div>
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<div><div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzakscreatecontrolsbs.htm" title="IBM supplies two complete controlling subsystem configurations: QBASE (the default controlling subsystem), and QCTL. Only one controlling subsystem can be active on the system at one time. Typically, the IBM supplied subsystem configurations should be sufficient for most business needs. However, you can create your own version of a controlling subsystem and configure it to more closely meet your company's unique needs.">Create a controlling subsystem</a></div>
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<div><a href="rzaksmakerestrictedstate.htm" title="If all of the subsystems, including the controlling subsystem are ended, the system goes into a restricted condition. You can place the system in a restricted condition by using one of two commands from an interactive workstation.">Place the system in restricted state</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="../experience/wmrstateabstract53.htm">Experience Report: Restricted State</a></div>
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</div>
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</div>
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</body>
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