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What will you do confronted with a one million trace messages recorded between 10:44:15 and 10:46:55 with an average trace statement current of 7,000 msg/s from dozens of modules and having a one sentence problem description? One solution is to try to search for a specific vocabulary relevant to the problem description, for example, if a problem is an intermittent re-authentication then we might try to search for a word “password” or a similar one drawn from a troubleshooting domain vocabulary. So it is useful to have a Vocabulary Index to search for. Hence, the same name of this pattern. In our trace example, the search for “password” jumps straight to a small activity region of authorization modules starting from the message number #180,010 and the last “password” occurrence is in the message #180,490 that narrows initial analysis region to just 500 messages. Note the similarity here between a book and its index and a trace as a software narrative and its vocabulary index.
- Dmitry Vostokov @ TraceAnalysis.org -
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April 12th, 2010 at 11:09 pm
[…] several regions based on a sequence of Anchor Messages. The choice of them can be determined by a Vocabulary Index or an Adjoint Thread of Activity. For example, an ETW trace with almost 900,000 messages recorded […]