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Internet Information Services (IIS) 6 Resource Kit by The Microsoft IIS Team

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Log File Formats in IIS

IIS provides six different log file formats that you can use to track and analyze information about your IIS-based sites and services. In addition to the six available formats, you can create your own custom log file format. For more information about custom logging, see "Custom Logging Modules" later in this chapter.

The following six log file formats are available in IIS:

  • W3C Extended log file format. Text-based, customizable format for a single site. This is the default format.

  • National Center for Supercomputing Applications (NCSA) Common log file format. Text-based, fixed format for a single site.

  • IIS log file format. Text-based, fixed format for a single site.

  • ODBC logging. Fixed format for a single site. Data is recorded ...

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