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* Copyright (c) 2000, 2006 IBM Corporation. |
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* IBM - Initial contribution |
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<title>Log file correlation</title> |
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<title>Log file correlation</title> |
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<h1>Log file correlation</h1> |
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<h1>Log file correlation</h1> |
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Correlation is the process of analyzing and determining a set of related |
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Correlation is the process of analyzing and determining a set of related |
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events, based on a set of rules that are used to interpret the data contained |
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events, based on a set of rules that are used to interpret the data contained |
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in the events. The Log Analyzer enables you to correlate information |
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in the events. The Log <span filter="plugin=org.eclipse.tptp.platform.doc.user">and Trace</span> Analyzer enables you to correlate information |
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within a log file from a single application |
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within a log file from a single application |
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or across multiple log files generated by different applications. </p> |
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or across multiple log files generated by different applications. </p> |
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<p>The Log Analyzer provides the following correlation methods:</p> |
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<p>The Log <span filter="plugin=org.eclipse.tptp.platform.doc.user">and Trace</span> Analyzer provides the following correlation methods:</p> |
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<ul> |
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<li>Sequential correlation: the ability to sort the events in a log by |
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<li>Sequential correlation: the ability to sort the events in a log by |
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various fields contained in the events (for example, time stamp)</li> |
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various fields contained in the events (for example, time stamp)</li> |
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<h2>Display</h2> |
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<h2>Display</h2> |
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<p>The Log Analyzer provides two different views for displaying correlations:<br> |
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<p>The Log <span filter="plugin=org.eclipse.tptp.platform.doc.user">and Trace</span> Analyzer provides two different views for displaying correlations:<br /> |
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</p> |
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<ul> |
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<li><i>Log interaction diagrams</i>, which display interactions |
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<li><i>Log interaction diagrams</i>, which display interactions |
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among log records that occur during the execution of an application.</li> |
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among log records that occur during the execution of an application.</li> |
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among log records that occur on different threads, which participate |
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among log records that occur on different threads, which participate |
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in the execution of an application.</li> |
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in the execution of an application.</li> |
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</ul> |
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</p> |
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<p> The window title displays the view type and the correlation schema used in the format <BR> |
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<p> The window title displays the view type and the correlation schema used in the format <BR /> |
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<I>Sequence Diagram: View name <Correlation schema></I> <BR> |
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<I>Sequence Diagram: View name <Correlation schema></I> <BR /> |
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where View name is the Log Interactions view or the Log Thread Interactions view <BR> |
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where View name is the Log Interactions view or the Log Thread Interactions view <BR /> |
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and the Correlation schema can be a predefined schema format such as Default Time. |
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and the Correlation schema can be a predefined schema format such as Default Time. |
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</p><p>Correlations are represented visually by an arrow that points from the source record to the target |
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</p> |
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<p>Correlations are represented visually by an arrow that points from the source record to the target |
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record. The following are different representations of correlations: |
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record. The following are different representations of correlations: |
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</p> |
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<ul> |
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<li> Correlation within a log file in a collapsed node.<br> |
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<li> Correlation within a log file in a collapsed node.<br /> |
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<img border="0" src="../images/celgco2.gif" alt="An arrow originating on a blue bar and looping back to it" width="33" height="28"> |
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<img border="0" src="../images/celgco2.gif" alt="An arrow originating on a blue bar and looping back to it" width="33" height="28" /> |
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</li> |
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<li>Correlations of a selected event in an expanded node. <br> |
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<li>Correlations of a selected event in an expanded node. <br /> |
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<img border="0" src="../images/celgco2_1.gif" alt="several arrows originating on a blue bar and looping back into the blue bar" width="37" height="134"> |
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<img border="0" src="../images/celgco2_1.gif" alt="several arrows originating on a blue bar and looping back into the blue bar" width="37" height="134" /> |
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</p> |
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</li> |
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<li>Correlation of an unselected node in an expanded node . <br> |
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<li>Correlation of an unselected node in an expanded node . <br /> |
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<img border="0" src="../images/celgco2_2.gif" alt="the target is a dot indicating that the target is on another page" width="114" height="34"> |
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</p> |
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</li> |
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<li> Correlation between log files <br> |
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<li> Correlation between log files <br /> |
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<img border="0" src="../images/celgco3.gif" alt="An arrow originating on a red bar and pointing to a blue bar" width="189" height="17"> |
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<img border="0" src="../images/celgco3.gif" alt="An arrow originating on a red bar and pointing to a blue bar" width="189" height="17" /> |
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</li> |
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<li> Correlation between logs where the source is outside of the current viewing page<br> |
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<li> Correlation between logs where the source is outside of the current viewing page<br /> |
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<img border="0" src="../images/celgco4.gif" alt="the source is a dot indicating that the source is on another page" width="102" height="15"> |
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</p> |
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</li> |
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<li> Correlation between logs where the target is outside of the current viewing page.<br> |
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<li> Correlation between logs where the target is outside of the current viewing page.<br /> |
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<img border="0" src="../images/celgco5.gif" alt="the target is a dot indicating that the target is on another page" width="116" height="17"> |
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</p> |
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</li> |
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<li></li><li></li><li><li></li> |
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</ul> |
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color is used to indicate the length of time, namely, the deeper the intensity, the higher the delta time. |
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color is used to indicate the length of time, namely, the deeper the intensity, the higher the delta time. |
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</p> |
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<b>Related tasks</b><br /> |
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<a href="../tasks/tecorlog.htm">Correlating log files</a><br /> |
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<b>Related tasks</b><br> |
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<a href="../tasks/tvwlogi.htm">Using log interaction diagrams</a><br /> |
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<a href="../tasks/tecorlog.htm">Correlating log files</a><br> |
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<a href="../tasks/tepref.htm">Setting preferences for the Log <span filter="plugin=org.eclipse.tptp.platform.doc.user">and Trace</span> Analyzer</a><br /> |
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<a href="../tasks/tvwlogi.htm">Using log interaction diagrams</a><br> |
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<a href="../tasks/tewrklog.htm">Working with log files</a><br /> |
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<a href="../tasks/tepref.htm">Setting preferences for the Log and Trace Analyzer</a><br> |
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</p> |
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<a href="../tasks/tewrklog.htm">Working with log files</a><br> |
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<b>Related reference</b><br> |
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<b>Related reference</b><br /> |
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<a href="../ref/relogvw.htm">Log view</a><br> |
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<a href="../ref/relogvw.htm">Log view</a><br /> |
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<a href="../ref/resqlgin.htm">Log interactions view</a><br> |
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<a href="../ref/resqlgin.htm">Log interactions view</a><br /> |
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<a href="../ref/rethrdin.htm">Log thread interactions view</a><br> |
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<a href="../ref/rethrdin.htm">Log thread interactions view</a><br /> |
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</p> |
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<br><p class="copyright">(C) Copyright IBM Corporation 2000, 2006. All Rights Reserved.</p><p> <br> </p> |
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</body></html> |
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<p class="copyright">(C) Copyright IBM Corporation 2000, 2006. All Rights Reserved.</p> |
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</body> |
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