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This article presents a simple Logtilla log analysis module, log_geoip_stats, which gives the top N client countries, in terms of hits, from web access log files. This module uses the libgeoip-erlang library to get geolocations from clients' IP addresses.

I have written a small Erlang framework for parsing web access logs, called Logtilla, hosted on GitHub. This framework supports parsing logs in the Common Log Format, or in Apache's Combined Log Format. Thanks to the use of a C port program to do the parsing, Logtilla is very efficient: it can parse and analyze 15,000 entries/sec on my 4-year-old laptop.