This trace contains seven month's worth of all HTTP requests to the
University of Saskatchewan's WWW server. The University of Saskatchewan is
located in Saskatoon, Saskatchewan, Canada.
The logs are an ASCII file with one line per request, with the following
- host making the request. A hostname when possible, otherwise
the Internet address if the name could not be looked up.
- timestamp in the format "DAY MON DD HH:MM:SS YYYY", where
DAY is the day of the week, MON is the name of the month,
DD is the day of the month, HH:MM:SS
is the time of day using a 24-hour clock, and YYYY is the year.
The timezone is -0400.
- request given in quotes.
- HTTP reply code.
- bytes in the reply.
The first log was collected from 00:00:00 June 1, 1995 through
23:59:59 December 31, 1995, a total of 214 days. In this seven
month period there were 2,408,625 requests. Timestamps have 1
The logs fully preserve the originating host and HTTP request.
Please do not however attempt any analysis beyond general traffic patterns.
The logs was collected by
Earl Fogel of the University of Saskatchewan,,
and contributed by Martin Arlitt (firstname.lastname@example.org)
and Carey Williamson (email@example.com) of the University
This is one of six data sets analyzed in an upcoming paper by
M. Arlitt and C. Williamson, entitled
``Web Server Workload Characterization: The Search for Invariants'',
to appear in the proceedings of the
1996 ACM SIGMETRICS Conference on the Measurement and Modeling of
Computer Systems, Philadelphia, PA,
May 23-26, 1996. An
extended version of this paper is available on-line; see
DISCUS home page and the group's
Permission has been granted to make four of the six data sets discussed
in ``Web Server Workload Characterization: The Search for Invariants''
available. The four data sets are:
NASA-HTTP , and
The traces may be freely redistributed.
Available from the Archive in
Access log, ASCII format, 30.5 MB gzip compressed,
233.4 MB uncompressed, and
Abort log, ASCII format, 370 KB gzip compressed,
2.7 MB uncompressed.
Traces In The Internet Traffic Archive.