127 lines
8.4 KiB
HTML
127 lines
8.4 KiB
HTML
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<meta name="DC.Title" content="Recovery for journal management after abnormal system end" />
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<title>Recovery for journal management after abnormal system end</title>
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<body id="rzakirecvabnend"><a name="rzakirecvabnend"><!-- --></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">Recovery for journal management after abnormal system end</h1>
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<div><p>This topic describes the recovery actions that take place in the
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event of an abnormal system end.</p>
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<div class="section">If the system abnormally ends while you are journaling objects, the
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system does the following:</div>
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<ol><li class="stepexpand"><span>Brings all journals, journal receivers, and objects you are journaling
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to a usable and predictable condition during the IPL or vary on of an independent
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disk pool, including any access paths being journaled and in use at the time
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the system abnormally ended.</span></li>
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<li class="stepexpand"><span>Checks all recently recorded entries in the journal receivers that
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were attached to a journal.</span></li>
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<li class="stepexpand"><span>Places an entry in the journal to indicate that an abnormal system
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end occurred. When the system completes the IPL or vary on of an independent
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disk pool, all entries are available for processing.</span></li>
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<li class="stepexpand"><span><img src="./delta.gif" alt="Start of change" />Checks that the journal receivers attached
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to journals can be used for normal processing of the journal entries. If some
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of the objects you are journaling could not be synchronized with the journal,
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the system sends message CPF3172 to the history log (QHST) that identifies
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the journals that could not be synchronized. If a journal or a journal receiver
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is damaged, the system sends a message to the history log identifying the
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damage that occurred (message CPF3171 indicates that the journal is damaged,
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and messages CPF3173 or CPF3174 indicate that the journal receiver is damaged).
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If a journal or journal receiver is found to no longer exist within a library,
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the system sends message CPI70EE to the history log.<img src="./deltaend.gif" alt="End of change" /></span></li>
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<li class="stepexpand"><span>Recovers each object that was in use at the time the system ended
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abnormally, using the normal system recovery procedures for objects.</span> <p>In addition, if an object being journaled was opened for output,
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update, or delete operations, the system performs the following functions
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so changes to that object will not be lost:</p>
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<ol type="a"><li><span>Ensures that the changes appear in the object. Changes that
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do not appear in the journal receiver are not in the object.</span></li>
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<li><span>Places an entry in the journal receiver that indicates whether
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the object was synchronized with the journal. For database files, if the file
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could not be synchronized with the journal, the system places message CPF3175
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in the history log identifying the failure, and you must correct the problem.
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For other journaled objects, the system places message CPF700C in the history
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log identifying the failure, and you must correct the problem.</span></li>
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</ol>
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<p>A synchronization failure can occur if the data portion of the object
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is damaged, a journal receiver required to perform the synchronization is
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damaged, or the journal is inoperable.</p>
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</li>
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</ol>
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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="rzakijrnrecovery.htm" title="Provides tasks that show you how to use journaling to recover data on your iSeries server.">Recovery operations for journal management</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzakirecovrcvdmg.htm" title="If a journal receiver becomes damaged, the system sends message CPF8136 or message CPF8137 to the system operator and the job log.">Recover a damaged journal receiver</a></div>
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<div><a href="rzakirecovjrndmg.htm" title="If a journal becomes damaged, the system sends message CPF8135 to the system operator and to the job log.">Recover a damaged journal</a></div>
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</div>
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</div><div class="nested1" xml:lang="en-us" id="recovabnormsysend"><a name="recovabnormsysend"><!-- --></a><h2 class="topictitle2">Recover after abnormal system end</h2>
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<div><div class="section">After an abnormal system end, perform the following steps:</div>
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<ol><li><span>Perform a manual IPL.</span></li>
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<li><span>Check the history log to determine if there are any damaged objects,
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objects that are not synchronized, or any damaged journals or journal receivers.</span></li>
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<li><span>If necessary, recover the damaged journals or journal receivers
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as described in Recover a damaged journal receiver and Recover a damaged
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journal.</span></li>
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<li><span>If there is a damaged object:</span><ol type="a"><li><span>Delete the object.</span></li>
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<li><span>Restore the object from the latest saved version.</span></li>
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<li><span>Allocate the object so no one else can access it.</span></li>
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<li><span>Restore the needed journal receivers if they are not online.
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Journal receivers do not need to be restored in a particular sequence. The
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system establishes the receiver chains correctly when they are restored.</span></li>
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<li><span>Use the APYJRNCHG or APYJRNCHGX command to apply the changes
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to the object.</span></li>
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<li><span>Deallocate the object.</span></li>
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</ol>
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</li>
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<li><span>If an object could not be synchronized, use the information in
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the history log and in the journal to determine why the object could not be
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synchronized and how to proceed with recovery. For example, you may need to
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use the DFU or a user-written program to bring a database file to a usable
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condition.</span></li>
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<li><span>Determine which applications or programs were active, and determine
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where to restart the applications from the information in the history log
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and in the journal.</span></li>
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</ol>
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<div class="section"><p>If a journaled access path is in use during an abnormal system
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end, that access path does not appear on the Edit Rebuild Access Path display.</p>
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<p>If
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the maintenance for the access path is immediate or delayed, the system automatically
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recovers the access path during IPL or vary on of an independent disk pool.
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A status message is displayed for each access path whose maintenance is immediate
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or delayed as it is being recovered during an IPL or vary on of an independent
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disk pool. The system places message CPF3123 in the system history log for
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each access path that is recovered through the journal during the IPL or vary
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on of an independent disk pool. This message appears for access paths that
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are explicitly journaled and for access paths that are protected by SMAPP.</p>
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</div>
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