Event Machine is a library for Ruby that provides event-driven I/O. It uses the reactor pattern to achieve high scalability, performance, and stability. Event Machine powers the backends of many large sites by enabling asynchronous programming and handling many concurrent connections efficiently. It can be used with tools like Rails, Thin, Goliath, MongoDB, and RabbitMQ to build highly scalable web applications. Benchmarks show that using Event Machine can process many more requests per second than a traditional Rails app due to its asynchronous and non-blocking nature.

1. Event Machine
Ricardo Almeida
@almeidaricardo
https://github.com/eventmachine/eventmachine

3. PostRank Tools
• Mysql, Ruby (API), Rails, Sinatra, Phyton,
Java, JRuby, EC2, Nagios, Ganglia, Solr
• Eventmachine, RabbitMQ
• From XMPP to AMQP
• Cassandra, Goliath
http://webpulp.tv/post/4184040219/scaling-postrank-using-ruby-and-eventmachine-with-ilya

4. Ilya Grigorik

7. Event Machine
• Fast, simple event-processing library for Ruby
programs
• Event-driven I/O
• Reactor pattern

8. Designed to
• Extremely high scalability, performance and stability
• An API that eliminates the complexities of high-
performance threaded network programming

10. Social Core
• Escalabilidade
• Disponibilidade - Todos requests devem ser
respondidos
• Consistência

11. Architectures
Job Manager
GET / POST Queue
Server Event
Process

12. Tools
• Rails 3.1.0.rc6
• Ruby 1.9.2-head
• Event-Machine
• Thin
• Goliath
• Mysql (gem mysql2 v 0.3.6)
• MongoDB
• RabbitMQ (AMQP)

13. EM-Tools
• https://github.com/eventmachine/eventmachine/wiki
• https://github.com/igrigorik/em-http-request
• https://github.com/igrigorik/em-synchrony
• https://github.com/postrank-labs/goliath

14. Benchmarks
• ApacheBench,Version 2.3
• Autoperf (httperf)

15. Provas!!

16. Sleep Select (1 sec)
• Tools:
• ApacheBench
• Rails 3.1.0.rc6 + Ruby 1.9.2-head + Mysql +
webrick
https://gist.github.com/1166610

17. Sleep Select (1 sec)
• ab -c 10 -n 10 'http://localhost:3000/people/wait'
• Time taken for tests: 11.255 seconds
https://gist.github.com/1166610

18. Sleep Select (1 sec)
• Tools: Assync Rails
• ApacheBench
• webrick
• Rails 3.1.0.rc6 + Ruby 1.9.2-head + Mysql + Thin
+ EventMachine
https://gist.github.com/1166610

19. Sleep Select (1 sec)
• ab -c 10 -n 10 'http://localhost:3000/people/wait'
• Time taken for tests: 2.371 seconds
https://gist.github.com/1166610

20. Goliath
• Heartbeat
• Assync Upload
• Routes
• Validations

21. Sleep Select (1 sec)
• Tools:
• ApacheBench
• Rails 3.1.0.rc6 + Thin
• Ruby 1.9.2-head + EventMachine + Mysql +
Goliath
https://gist.github.com/1166462

22. Goliath +
ActiveRecord

23. Sleep Select (1 sec)
• ab -c 10 -n 10 'http://0.0.0.0:9000/wait?format=json'
• Time taken for tests: 2.198 seconds
https://gist.github.com/1166610

24. HTTP assinc
Req/Resp no MongoDB
• Tools:
• ApacheBench
• Mysql
• Ruby 1.9.2-head + EventMachine + Goliath +
MongoDB

25. HTTP assinc
Req/Resp no MongoDB
• ab -c 10 -n 10 'http://0.0.0.0:9000/teste?format=json'
• Time taken for tests: 0.209 seconds

26. HTTP assinc
Req/Resp no MongoDB
• ab -c 50 -n 50 'http://0.0.0.0:9000/teste?format=json'
• Time taken for tests: 1.105 seconds

27. EM + RabbitMQ

28. EM + RabbitMQ

29. Domínios
• AAPG • Facebook
• Anotations • Twitter
• Activity (New) • Google+

30. http://www.slideshare.net/hungryblank/distributed-and-concurrent-programming-with-rabbitmq-and-eventmachine-rails-underground-2009

31. http://www.slideshare.net/hungryblank/distributed-and-concurrent-programming-with-rabbitmq-and-eventmachine-rails-underground-2009

32. http://www.slideshare.net/hungryblank/distributed-and-concurrent-programming-with-rabbitmq-and-eventmachine-rails-underground-2009

33. SPDY
http://www.igvita.com/2011/04/07/life-beyond-http-11-googles-spdy/

34. Obrigado!
Ricardo Almeida
@almeidaricardo