74 lines
4.5 KiB
HTML
74 lines
4.5 KiB
HTML
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<meta name="dc.date" scheme="iso8601" content="2005-10-03" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>General configuration considerations for improved error recovery performance</title>
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<a name="rzahjerr-cononlineinsts"></a>
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<h4 id="rzahjerr-cononlineinsts">General configuration considerations for improved error recovery performance</h4>
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<p>Careful use of the ONLINE general configuration parameter is necessary
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to avoid unnecessary communications error recovery. Most communications configuration
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objects are created with the ONLINE parameter default set to *YES (except
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for PPP lines, the ONLINE parameter is set to *NO). Consider the setting
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of the ONLINE parameter in any of the following: </p>
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<ul>
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<li>CRTCTLxxx commands</li>
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<li>CRTDEVxxx commands</li>
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<li>CRTLINxxx commands</li>
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<li>CRTNWIxxx commands</li>
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<li>CRTNWSD command</li></ul>
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<a name="wq29"></a>
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<div class="notetitle" id="wq29">Note:</div><img src="delta.gif" alt="Start of change" />
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<div class="notebody">For the network server (NWS) command, you
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should set the ONLINE parameter value to *NO. If network server descriptions
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are brought online during the system initial program load (IPL), important
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system jobs might be held up and unavailable for other work.</div><img src="deltaend.gif" alt="End of change" />
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<p>When choosing how to set the ONLINE parameter, consider the following:</p>
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<ul>
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<li>Limit the configuration objects that vary on during IPL with the ONLINE
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parameter set to *YES. These objects should be only those like tape drives,
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CD-ROM drives, and selected local workstations that are critical to getting
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your applications up and available for general system use.</li>
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<li>Place critical users in a subsystem group, and vary on configuration objects
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for this group by using the ONLINE parameter that is set to *YES. This allows
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critical users to get back online sooner.</li>
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<li>For noncritical users, vary on configuration objects at a later point
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by setting the ONLINE parameter to *NO. Use a CL program or change the system
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startup program to manage vary on of the remaining configuration objects.</li>
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<li>For controllers on local area networks (LAN), set the auto-configuration
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parameter (AUTOCRTCTL) to *YES on the appropriate LAN controller descriptions.
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Let the system vary these controller descriptions on as needed.</li>
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<li>Whenever possible, avoid varying on any configuration that would fail
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in attempts to connect to remote systems. For example, avoid varying on controllers
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with a link type of *LAN that have an initial connection of *DIAL, when remote
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systems are not available. Personal computers on local area networks (LANs)
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typically do not respond to connection attempts.</li></ul>
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<p>See the following references for more detail:</p>
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<ul>
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<li>For advanced configuration pages, see the <a href="../books/c4154010.pdf" target="_blank">Communications Configuration</a>
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<img src="wbpdf.gif" alt="Link to PDF" /> book.</li>
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<li>For more information about iSeries™ communications, see the <a href="../books/sc415406.pdf" target="_blank">Communications Management</a>
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<img src="wbpdf.gif" alt="Link to PDF" /> book.</li></ul>
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