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Table Of Contents
The Data Warehouse Toolkit - Third Edition
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The clickstream is not just another data source that is extracted, cleaned, and dumped into the DW/BI environment. The clickstream is an evolving collection of data sources. There are a number of server log file formats for capturing clickstream data. These log file formats have optional data components that, if used, can be very helpful in identifying visitors, sessions, and the true meaning of behavior.
Because of the distributed nature of the web, clickstream data often is collected simultaneously by different physical servers, even when the visitor thinks they are interacting with a single website. Even if the log files collected by these separate servers are compatible, a very interesting problem arises in synchronizing the log files after the fact. Remember that a busy web server may be processing hundreds of page events per second. It is unlikely the clocks on separate servers will be in synchrony to one-hundredth of a second.
You also obtain clickstream...
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