I have a question concerning the log file from an apache web server.

How can I :
a) roughly estimate the number of requests processed per
second by the web server.
b) tally the top ten hosts who send most of the requests to
the web server for the last 30 minutes.

Could any web server admin gurus lend a helping hand?????

Thanks!
ppychu

You can simple do a head -1 and a tail -1 on the logfile, filter out the timestamp, and build an algorithm that calculates the number of seconds between the first and last entry. You would also count the number of entries using something line cat filename | wc -l to give you the number of lines.

Similar idea for 'the last thirty minutes, top user' but this requires considerable more processing, including building a table, pattern matching, etc.