README

• Requirements:
  1. Perl - I run simulations with Perl for Windows but with minor changes they can be run under any Unix-like OS. The only difference is that you have to add full path to files which are processed under Unix  and
     #!/usr/local/bin/perl
     (full path to Perl interpreter) is necessary for scripts in Unix.
     (e.g. filter.plwhich I run on Solaris)
  2. Basic knowledge of Perl
  3. Traces which can be obtained on address:
     ftp://ftp.ircache.net/Traces/
     for more information visit
     http://ircache.nlanr.net/
     Note: Those traces are updated daily.
  4. A lot of disk space for traces and a lot of memory for simulation
• Installation:
  1. Download traces for number of days you want to simulate
  2. Unzip them in the same directory and add extension .trc
  3. Run filter.pl to make one very large file. This program filters traces and put only necessary data for every URL in that file. It also renames URLs with numbers to reduce amount of data to be stored in the operating memory during simulation.
  4. There are few algorithms simulated fifo (fifo.pl), lru (lru.pl), lfd (lfd.pl), infinite (infinite.pl) and pd (pd.pl) (the one I'm currently working on)
• Run
  1. under Windows type
     perl  filename.pl
     or  under Unix-like OS type
     perl ./filename.pl
  2. for some programs it is necessary to manually create log file. Create simple and empty text file with required file name
• Report
  1. Results of a simulation are reported on the screen and in the log file. Each algorithm has it's own log file and results of following simulations are appended to previous results.
  2. hit rate and weighted (byte) hit rate are reported
  3. expiration date is not accounted
• Notes:
  1. Any bugs and questions forward to dwecci@sezampro.yu .
  2. Other files in the current directory are not necessary for simulation and therefore are not explained. If you have questions about them forward questions to dwecci@sezampro.yu .
  3. Have a nice simulation :) .

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