Sawmill is a logging and log analysis system for Ruby. It extends the basic Ruby logging facility with log records and logfile parsing features.
What is it?
A user reported a bug in your Rails application, and now you have to figure out what happened. You can spend hours poring over megabytes of text log files, stretching your grep-fu to its snapping point… or you can use Sawmill.
Your CEO wants to know how many people viewed the new product pages last week. You can write yet another arcane sed script looking for that elusive pattern in the log files… or you can use Sawmill.
Sawmill is an extension to the standard ruby Logger mechanism that enables automated log analysis. Designed especially for web applications using Ruby on Rails and similar frameworks, Sawmill originated in the source to www.geopage.com, where it has been analyzing the production Rails logs for more than three years.
Drop-in compatible with standard ruby Logger class
Custom log levels
Process log entries as objects
Group log entries into log records with unique record IDs and attributes
Filtering and analysis of log entries and log records
Write logfiles, optionally with one of several logfile rotation mechanisms
Parse logfiles back into log entries and log records
Log analysis framework
Rack middleware for quick setup of web service logs
Railtie for Rails 3 integration
Ruby 1.8.7 or later (Ruby 1.9.2 or later recommended), or JRuby 1.4 or later.
Blockenspiel 0.4.5 or later.
gem install sawmill
Known issues and limitations
Sawmill is currently under development, and some features are not yet complete or fully tested.
Development and support
Documentation is available at dazuma.github.com/sawmill/rdoc
Source code is hosted on Github at github.com/dazuma/sawmill
Contributions are welcome. Fork the project on Github.
Report bugs on Github issues at github.org/dazuma/sawmill/issues
Contact the author at dazuma at gmail dot com.
Author / Credits
Sawmill is written by Daniel Azuma (www.daniel-azuma.com).
Development is supported by Pirq (www.pirq.com).
Continuous integration service provided by Travis-CI (travis-ci.org).
Copyright 2009-2012 Daniel Azuma.
All rights reserved.
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