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AnyData - A case study.
You can also use AnyData to quickly filter your data file.

Suppose you have some web access logs:

 annoy.com - - [12/Apr/2004:14:33:56 -0400] "GET /perl-qa/2003-03 HTTP/1.0" 301 241 "-" "Mozilla/5.0"
 annoy.com - - [12/Apr/2004:14:36:25 -0400] "GET /perl-qa/2003-03/ HTTP/1.0" 200 7394 "-" "Mozilla/5.0"
 1.2.3.4 - - [12/Apr/2004:14:42:08 -0400] "GET /robots.txt HTTP/1.1" 404 216 "-" "Some browser"
 1.2.3.4 - - [12/Apr/2004:14:42:11 -0400] "GET /cgi-bin/namazu.cgi?idxname=perl6-internals HTTP/1.1" 200 9709 "-" "Some browser"

You want to find out how many times you got hit from annoy.com.

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Copyright (c) 2004 pair Networks, Inc. | Daniel J. Wright