74 lines
7.1 KiB
HTML
74 lines
7.1 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<html>
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<head>
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<title>Microsoft Index Server Guide: Error Detection and Recovery</title>
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<meta name="FORMATTER" content="Microsoft FrontPage 1.1">
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<meta name="GENERATOR" content="Microsoft FrontPage 1.1">
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</head>
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<body bgcolor="#FFFFFF">
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<!--Headerbegin--><p align=center><a name="TOP"><img src="onepix.gif" alt="Space" align=middle width=1 height=1></a> <a href="default.htm#Top"><img src="toc.gif" alt=" Contents" align=middle border=0 width=89 height=31></a> <a href="errorhlp.htm"><img src="previous.gif" alt="Previous" align=middle border=0 width=32 height=31></a> <a href="glossary.htm"><img src="next.gif" alt="Next" align=middle border=0 width=32 height=31></a> </p>
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<hr>
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<!--Headerend--><p><a name="ErrorDetectionandRecovery"><font size=6><strong>Error Detection and Recovery</strong></font></a></p>
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<p align=left><!--Chaptoc--></p>
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<blockquote>
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<p><a href="errhandl.htm#LostFileNotifications">Lost File Notifications</a> <br>
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<a href="errhandl.htm#DroppedNetworkConnections">Dropped Network Connections</a> <br>
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<a href="errhandl.htm#CorruptedFilesandFaultyFilter DLLs">Corrupted Files and Faulty Filter DLLs</a> <br>
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<a href="errhandl.htm#Disk-FullCondition">Disk-Full Condition</a> <br>
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<a href="errhandl.htm#CorruptedPropertyCache">Corrupted Property Cache</a> <br>
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<a href="errhandl.htm#DataCorruptionandInternalInconsistencies">Data Corruption and Internal Inconsistencies</a> <br>
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</p>
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</blockquote>
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<hr>
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<!--ChaptocEnd--><p>Several kinds of errors are automatically detected by Microsoft Index Server and recovered. Other than hardware failures and
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situations where the catalog drive runs out of disk space, no manual intervention is needed.</p>
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<hr>
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<h1><a href="#TOP"><img src="up.gif" alt="To Top" align=middle border=0 width=14 height=11></a><a name="LostFileNotifications">Lost File Notifications</a></h1>
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<p>During normal operation of Index Server, all changes to the documents in the <a href="glossary.htm#IndexedDirectory"><em>indexed directories</em></a> are automatically tracked if
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the indexed directories are on computers running Windows NT. If the rate of file modification is very high, it is possible to lose
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some notifications due to buffer overflows. In that case, Index Server automatically schedules an <a href="scanhlp.htm#IncrementalScan">incremental scan</a> on the
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scope that lost notifications. No manual intervention is needed.</p>
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<hr>
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<h1><a href="#TOP"><img src="up.gif" alt="To Top" align=middle border=0 width=14 height=11></a><a name="DroppedNetworkConnections">Dropped Network Connections</a></h1>
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<p>If a virtual root is pointing to a remote share and the connection to the remote share is lost, it is called a <em>disconnected path</em>.
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Index Server detects this situation and <a href="reghelp.htm#ForcedNetPathScanInterval">periodically</a> scans the remote shares to see if the connection is active. No manual
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intervention is needed.</p>
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<hr>
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<h1><a href="#TOP"><img src="up.gif" alt="To Top" align=middle border=0 width=14 height=11></a><a name="CorruptedFilesandFaultyFilter DLLs">Corrupted Files and Faulty Filter DLLs</a></h1>
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<p>If corrupted files are detected by the <a href="filtrhlp.htm#CiDaemon">CiDaemon</a> process, the files will be marked as <em>unfiltered</em>. You can get a list of unfiltered<em>
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</em>files by issuing an <a href="adminhlp.htm#UnfilteredFiles">adminstrative command</a> to list the unfiltered files. There might also be a problem with the <a href="filtrhlp.htm#FilterDLLs">filter DLL</a> used to
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filter those files. If a particular type of file is consistently not being filtered, you should contact the vendor of that filter DLL.</p>
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<hr>
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<h1><a href="#TOP"><img src="up.gif" alt="To Top" align=middle border=0 width=14 height=11></a><a name="Disk-FullCondition">Disk-Full Condition</a></h1>
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<p>If the <a href="glossary.htm#CatalogDrive">catalog drive</a> starts getting full, indexing is temporarily paused. <a href="filtrhlp.htm">Filtering</a> cannot continue unless disk space is freed up on
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the catalog drive. A message is written to the <a href="errorhlp.htm#LowDiskEvent">event log</a> when the disk starts getting full. Administrators should monitor the
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event log for these messages and take corrective action. To avoid a disk-full condition, follow the <a href="install.htm#RecommendedConfiguration">configuration guidelines</a>
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given in the <a href="install.htm">installation page</a>.</p>
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<hr>
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<h1><a href="#TOP"><img src="up.gif" alt="To Top" align=middle border=0 width=14 height=11></a><a name="CorruptedPropertyCache">Corrupted Property Cache</a></h1>
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<p>If Index Server is shut down abruptly or a corruption is detected during normal operation, the <a href="indexhlp.htm#PropertyCache">property cache</a> will be marked
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as corrupted. A recovery action will be performed on the property cache when Index Server is restarted. One <a href="errorhlp.htm#RecoveryStart">event log
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message</a> is written at the beginning of the recovery action and another at the <a href="errorhlp.htm#RecoveryEnd">end of recovery</a>. During recovery, queries will be
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allowed but <a href="filtrhlp.htm">filtering</a> will not start until the recovery is completed. No manual intervention is needed.</p>
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<hr>
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<h1><a href="#TOP"><img src="up.gif" alt="To Top" align=middle border=0 width=14 height=11></a><a name="DataCorruptionandInternalInconsistencies">Data Corruption and Internal Inconsistencies</a></h1>
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<p>As a result of a power failure or other catastophic event, the index data may become corrupted beyond repair. In that
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situation, existing Index Server data is deleted and all the documents are refiltered. If corruption is detected during Index
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Server startup, the refiltering will happen automatically. However, if corruption is detected during normal operation, an <a href="errorhlp.htm#CorruptRestart">event
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log message</a> is written and no further queries are allowed. When this event is written to the event log, administrators should
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<a href="install.htm#StopAndStart">stop and restart Index Server</a>. </p>
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<p>When automatic recovery is performed by Index Server, an <a href="errorhlp.htm#CorruptCatalog">event</a> is written to the event log. If the catalog specified in the
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event log message had default settings and all the virtual roots were indexed, no action is required.</p>
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<p><strong>Note</strong>   If some virtual roots were marked not to be indexed, administrators have to explicitly disable indexing on those virtual
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roots again. Use the <a href="/scripts/srchadm/admin.idq?">virtual root configuration</a> option from the <a href="/srchadm/admin.htm">administrative Web page.</a></p>
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<!--Footerbegin--><hr>
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<p align=center><a href="default.htm#Top"><img src="toc.gif" alt=" Contents" align=middle border=0 width=89 height=31></a> <a href="errorhlp.htm"><img src="previous.gif" alt="Previous" align=middle border=0 width=32 height=31></a> <a href="#TOP"><img src="up_end.gif" alt="To Top" align=middle border=0 width=32 height=31></a> <a href="glossary.htm"><img src="next.gif" alt="Next" align=middle border=0 width=32 height=31></a></p>
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<hr>
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<p align=center><em>© 1996 by Microsoft Corporation. All rights reserved.</em> <!--Footerend--></p>
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</body>
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</html>
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