High Performance Ruby: Threading versus Evented (Ruby MidWest edition)

Transcript

1. High-Performance Ruby: Evented vs readed @drnic | drnicwilliams.com | engineyard.com

   Dr Nic Williams

2. “ruby midwest”

3. “ruby midwest”

4. midwest

5. midwest

6. kansas

7. kansas city

8. in Missouri

9. midwest?!

10. an actual safari

11.  ________   <  Safari  >  -­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐        

             \      ^__^                  \    (xx)\_______                        (__)\              )\/\                          ^    ||-­‐-­‐-­‐-­‐w  |                                ||          ||

12. drnic cowsay

13. None

14. You have $

15. New project/rapid dev Optimise (features/$) (req latency/$) (req thru-put/$) (bugs/$)

16. Add resources

17. Resources = $ $

18. or even $$$$$ $ $ $ $ $

19. Optimise New project/rapid dev (features/$) (performance/$0) how?

20. None

21. •Add resources •Use resources better Options

22. you? just write code

23. evented -> threads -> your code

24. nginx -> trinidad -> web app

25. evented? arrange I/O

26. threads? actual work

27. you? just write code

28. evented -> threads -> your code

29. nginx -> trinidad -> web app

30. •Add resources •Use resources better Options

31. •process concurrency •threaded concurrency •evented concurrency Concurrency

32. Process vs readed

33. •1 req = 1 process = 150Mb •“100 reqs?” =

    15Gb! •Orchestrated by? Kernel •Unicorn, Passenger Process Concurrency

34. •1 req = 1 thread = 2kb •“100 reqs?”=150Mb+200kb •Orchestrated

    by? Kernel •Mongrel* readed Concurrency

35. 1 req = 1 thread = 2kb

36. Process vs readed

37. evented -> threads -> your code

38. None

39. •.... •.... •.... •Mongrel* readed Concurrency

40. •.... •.... •.... •Mongrel* readed Concurrency

41. “Mongrel is threaded?!”

42. None

43. Mongrel * Rails * Ruby1.8 --> process conc. 2006 reality:

44. 20068 reality: “Rails 2.2... rst...thread safe Rails” --Pratik Naik

45. 20068 reality: config.threadsafe! http://guides.rubyonrails.org/configuring.html

46. 20068 reality: # do nothing http://www.sinatrarb.com/configuration.html

47. Mongrel * Rails * Ruby1.8 --> process conc. 20068 reality:

48. 200810 reality: “Ruby 1.9.2 is released”

49. 200810 reality: 1.9 has native threads!

50. 200810 reality: 1 thread of Ruby at a time :(

51. 200810 reality: GIL = Global Interpreter Lock :(

52. 200810 reality: GIL:( “Grumpy Gil”

53. Mongrel * Rails * Ruby1.9 --> process conc. 200810 reality:

54. “Mongrel is threaded?!” “Rails is threadsafe” but no threads...

55. None

56. “reads please!”

57. rvm install jruby rvm use jruby gem install rails rails

    new myapp

58. gem 'activerecord- jdbcsqlite3- adapter' gem 'jruby-openssl'

59. Mongrel * Rails * JRuby --> thread concurrency!

60. 1 req = 1 thread = 2kb

61. “How do I run JRuby/ Rails?”

62. How? -> trinidad -> web app

63. $ gem install trinidad $ trinidad --> localhost:3000

64. $ git clone git:// github.com/ engineyard/todo.git $ cd todo $

    bundle $ rake db:migrate $ trinidad

65. # config.threadsafe! $ trinidad Info: max runtimes = 5

66. config.threadsafe! # yes! $ trinidad -e production Info: max runtimes

    = 1 (Thread limit 200)

67. 1 req = 1 thread = 2kb

68. And its just normal web app code!

69. evented -> threads -> your code

70. nginx -> trinidad -> web app

71. “I’m scared of threads”

72. Web apps are* thread safe

73. “Store state elsewhere; Unless its safe” Dr Nic’s Joy of

    Concurrency
74. None

75. evented -> threads -> your code

76. nginx -> trinidad -> web app

77. “I came to hear good things about EventMachine”

78. “Evented is cool, threads are not”

79. “You haven’t said ‘nodejs’ once!?”

80. What is evented? any I/O? do something with it

81. cache hits req ? web app cache miss

82. cache hits req ? web app cache miss

83. req I/O work

84. req I/O work evented threads

85. req I/O work evented threads trinidad nginx

86. nginx vs apache

87. “Hosted?” 500 hrs free!

88. jruby core trinidad core rubinius core Come work with us!

89. -> your code “Be a happy developer”

90. -> threads -> your code

91. evented -> threads -> your code

92. nginx -> trinidad -> web app @drnic | drnicwilliams.com |

    engineyard.com

93.  _____________   <  Power  Ruby!  >  -­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐      

               \      ^__^                  \    (Oo)\_______                        (__)\              )\/\                          <>  ||-­‐-­‐-­‐-­‐w  |                                ||          || @drnic | drnicwilliams.com | engineyard.com