Grow Your Unix Beard With Ruby

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Grow Your Unix Beard With Ruby Jesse Storimer Wednesday, 10 October, 12

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@jstorimer Wednesday, 10 October, 12

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Unix Ruby Wednesday, 10 October, 12

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http://tomayko.com/writings/unicorn-is-unix Wednesday, 10 October, 12

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:o Wednesday, 10 October, 12

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Rack HTTP server for fast clients and Unix Wednesday, 10 October, 12

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Rack HTTP server for fast clients and Unix Wednesday, 10 October, 12

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Pre-forking Wednesday, 10 October, 12

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forking Wednesday, 10 October, 12

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fork() creates a new process Wednesday, 10 October, 12

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fork() returns twice Wednesday, 10 October, 12

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fork() returns twice Wednesday, 10 October, 12

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fork() returns twice once, but in two processes Wednesday, 10 October, 12

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fork() creates an exact copy of the calling process Wednesday, 10 October, 12

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@hits = Array(1..5) pid = Process.fork do @hits.delete_at(1) puts "Child hits: #@hits" end Process.wait(pid) puts "Parent hits: #@hits" Wednesday, 10 October, 12

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$hits = Array(1..5) pid = Process.fork do $hits.delete_at(1) puts "Child hits: #{$hits}" end Process.wait(pid) puts "Parent hits: #{$hits}" Wednesday, 10 October, 12

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Pre-forking Wednesday, 10 October, 12

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def start open_listener_socket load_rack_app 2.times do fork { worker_loop } end end def worker_loop loop do connection = listener_socket.accept process_client(connection) end end Wednesday, 10 October, 12

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copy on write: share memory until it’s modified Wednesday, 10 October, 12

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CoW Friendly Rubies •MRI 2.0 •Ruby Enterprise Edition •MRI 1.9.3-p194-perf Wednesday, 10 October, 12

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http://bit.ly/mri-perf Wednesday, 10 October, 12

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accept() accept() Wednesday, 10 October, 12

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fast, efficient booting robust connection handling Wednesday, 10 October, 12

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worker heartbeats self-pipe trick Wednesday, 10 October, 12

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replace an instance of itself without losing any connections Wednesday, 10 October, 12

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exec() transforms the calling process into a new process Wednesday, 10 October, 12

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def reexec fork do cmd = [$0] cmd << ARGV.dup ENV['LISTENERS'] = sockets.map(&:fileno) exec(*cmd) # exec("unicorn", "-c", "unicorn_config.rb") end end Wednesday, 10 October, 12

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Old Master Worker Worker Wednesday, 10 October, 12

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Old Master Worker Worker Worker Worker New Master Wednesday, 10 October, 12

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Worker Worker New Master Wednesday, 10 October, 12

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The original Unix beards Wednesday, 10 October, 12

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“[..] the Unix beard is really an extension of the philosopher's beard, and the academic's beard.” Wednesday, 10 October, 12

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Thanks! Tweet @jstorimer Email jstorimer@gmail.com Books http://workingwithcode.com Use MAGICRUBY to save $10 Wednesday, 10 October, 12

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Refs •http://www.colourlovers.com/palette/1938182/coconut_lips_RC •http://www.colourlovers.com/palette/1111659/Ninja_Rainbow •http://www.flickr.com/photos/soyunterrorista/2658174628/sizes/l/in/photostream/ •http://www.colourlovers.com/palette/1936237/Keynote_2 •http://whiteboardunicorns.com/ •http://www.flickr.com/photos/amyvdh/6003141750/sizes/o/in/photostream/ •http://www.twoideas.org/2009/07/unix-beards/ •http://www.flickr.com/photos/69er/463302758/ Wednesday, 10 October, 12