JRuby At LinkedIn
- 1. JRuby at LinkedIn in three acts Baq Haidri | @baqhaidri Wednesday, August 3rd 2011 Recruiting Solutions professional hacking
- 2. Me • Generalist • Background in Java, not Ruby professional hacking 2
- 3. 100M+ LinkedIn 90 • Over one user added per second • Mostly Java 55 • Strong product focus 32 17 8 2 4 2004 2005 2006 2007 2008 2009 2010 LinkedIn Members (Millions) professional hacking
- 4. Act I: The Data professional hacking 4
- 5. source: Mathieu Bas/an using Gephi on LinkedIn skill data professional hacking 5
- 6. professional hacking source: Mathieu Bas/an using Gephi on LinkedIn skill data 6
- 7. Rails Prototype professional hacking 7
- 8. Act II: The Challenge professional hacking 8
- 10. Service Call Security, Auth, Iden5ty Naviga5on Bar Interna5onaliza5on Qui a consulté votre profil? Unified URL genera5on professional hacking 10
- 11. Tomcat LinkedIn Spring MVC SiteMesh Request JRuby-‐Rack Sinatra get ‘/hello’ do erb :layout end <html> <head> <title>Hi</title> </head> <body> Hello from JRuby! </body> </html> Response professional hacking 11
- 12. Hello from JRuby! professional hacking 12
- 13. Service Calls Pre-existing library for parallel, de-duplicating async data operations, loosely based on REST Clunky abstractions in Java, but wrapped by Ruby: professional hacking 13
- 14. Ruby’s simplicity Some Ruby wrappers were created to mimic Java APIs but Ruby made them more expressive: professional hacking 14
- 15. Act III: To Production professional hacking 15
- 16. #winning! huh? professional hacking 16
- 17. Deployment Ops knows nothing ‣ Configuration ‣ Deployment ‣ Monitoring Standard monitoring already available via JMX: ‣ Latency ‣ Requests/Second ‣ Memory and CPU usage source: LinkedIn internal performance graph professional hacking 17
- 18. Gotchas Unpack wars on deployment Watch out for PermGen usage: Leak! Restart Fixed source: LinkedIn internal performance graph professional hacking 18
- 19. Flags JVM: ‣ -XX:PermSize=256m ‣ -XX:MaxPermSize=256m ‣ -XX:+CMSClassUnloadingEnabled JRuby: ‣ None, but still use 1.8.7 ‣ JRuby 1.6.2 professional hacking 19
- 20. Performance Internal latency is averaging 700ms Time spent in Ruby <= ~50 ms source: LinkedIn internal performance graph professional hacking 20
- 21. Conclusion professional hacking 21
- 22. Happily Ever After Adoption of JRuby is growing internally Open-minded, polyglot culture professional hacking 22
- 23. JRubyConf Swag Contest Visit linkedin.com/skills/skill/JRuby Tweet-share the page Be sure to include link back to JRuby Skills page, with the #in tag and a #jrubyconf tag. First 40 users to tweet will win a prize Winners announced at lunch tomorrow professional hacking 23
- 24. Questions? professional hacking 24