Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
TIMESTAMPS
NASA-HTTP
Description
These two traces contain two month's worth of all HTTP requests to the
NASA Kennedy Space Center WWW server in Florida.
Format
The logs are an ASCII file with one line per request, with the following
columns:
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.
Measurement
The first log was collected from 00:00:00 July 1, 1995 through
23:59:59 July 31, 1995, a total of 31 days. The second log was
collected from 00:00:00 August 1, 1995 through 23:59:59 Agust 31, 1995,
a total of 7 days. In this two week period there were
3,461,612 requests. Timestamps have 1 second resolution. Note that
from 01/Aug/1995:14:52:01 until 03/Aug/1995:04:36:13 there are no accesses
recorded, as the Web server was shut down, due to Hurricane Erin.
Privacy
The logs fully preserve the originating host and HTTP request.
Please do not however attempt any analysis beyond general traffic patterns.
Acknowledgements
The logs was collected by
Jim Dumoulin of the Kennedy Space Center,
and contributed by Martin Arlitt (mfa126@cs.usask.ca)
and Carey Williamson (carey@cs.usask.ca) of the University
of Saskatchewan.
Publications
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
also the
DISCUS home page and the group's
publications.
Related
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:
Calgary-HTTP ,
ClarkNet-HTTP ,
NASA-HTTP , and
Saskatchewan-HTTP .
