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Do you know what your Perl scripts did last night at 3am? Log4perl, an open and extendable logging system for both simple Perl scripts and complex module architectures, provides various data output mechanisms (files, databases, sockets, GUIs), and an unmatched, highly scalable way of changing logging granularity in running systems.
Traditional logging systems, when activated under load, are generating a flood of log messages, slowing down production systems to a crawl. The increasingly popular Log::Log4perl module allows for remote-controlling the logging behavior of different parts of large systems at granular levels at runtime without changing code or restarting.
Log::Log4perl strives to be a slam-dunk solution for all use cases, from small test scripts to full-scale software architectures running at high load. Starting logging with simple scripts is easy, even for beginners, and as systems grow, experts appreciate knowing what is going on in which parts of the system without sacrificing much performance.
Mike Schilli is the Perl architect at Yahoo!.
He has written a book on Perl, has authored 50 CPAN modules and publishes a monthly Perl column in Linux Pro Magazine.