One of the great features that we added to our W3Clogging enhancements in FTP 7.0 and FTP 7.5 is the ability to track unique sessions, which are represented by GUIDs in a field that is named x-session . Because of this addition, you can do some interesting
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Read the complete post at http://blogs.iis.net/robert_mcmurray/archive/2009/06/11/using-logparser-with-ftp-7-x-sessions.aspx