Node.jsの非同期とI/Oについて調べてみた

Transcript

1. Node.js I/O    Node.js
     
     

   Ginza.js#7 @PLAID Yuta Ide(@sadnessOjisan)

2. Yuta Ide (
    ) @sadnessOjisan (Twitter, Github, Qiita)

3.    
     

4. 
   Node.js

5.  
   

6.      

7.    
        

8. Node.js  •  •  I/O • ( 

   )

9.   
   

10. 
    
           A B

    C 
    
    

11.   " !  #   $ 

12.     1     A

13. 
    

14.       
     

15. C10K
    

16. Node.js    

17.        

18.   •    •  
     •

        • 

19.    
       A B C

20.    B A C  
    
    

21.    
    

22.         B A

    C  

23. 
      I/O

24. I/O  app  

25. I/O   • to RAM < to Disk •

      
    network

26. I/O    B A C 
    
    

27. 
    I/O  I/O

28.     I/O
    

29. 
        I/O

30.  Node.js  

31. Node.js 
       I/O

32.   I/O  AI/O 
    
    *0͕ൃੜͯ͠΋ɺޙଓॲཧ Λߦ͏ɻ*0׬ྃޙʹ΋ͱ΋

    ͱ΍Γ͔ͨͬͨॲཧΛߦ͏  A

33. 
      Node.js 

34.   I/O  • I/O  •  

    

35. I/O 
      
    https://www.packtpub.com/web- development/nodejs-design-patterns

36. Busy Wait Pattern • Bad    • While
    

     
    

37.  
    I/O  

38. Reactor Pattern https://subscription.packtpub.com/book/web_development/9781 783287314/1/ch01lvl1sec09/the-reactor-pattern

39. 
     https://subscription.packtpub.com/book/web_development/9781 783287314/1/ch01lvl1sec09/the-reactor-pattern ͳΜ͔Χοί͍͍ʂʂʂ

40. Demulti plexier I/O  
     

41. Event queue I/O
      

42. Event loop Queue
     

43.    
    

44. 
    

45.   queue 
    OS   

46. Kqueue https://nxmnpg.lemoda.net/ja/2/kqueue man
    

47.  EV_SET(&kev, fd, EVFILT_VNODE, EV_ADD, NOTE_WRITE, 0, NULL); ret =

    kevent(kq, &kev, 1, NULL, 0, NULL); https://github.com/sadnessOjisan/kqueue_fileio
    

48. 
      Node.js 

49. 
      Node.js     OS  

50. 

51. MacFile I/O  • Mac OS

52. libuv •   
     I/O  • OS 
    

53. 
        !

54. libuv • I/OOS •  
     •  
    

55. Q:  Node.js  

56. A: 
     http://docs.libuv.org/en/v1.x/design.html

57. 
    

58. Default loop
     http://docs.libuv.org/en/v1.x/guide/basics.html

59. Wather  http://docs.libuv.org/en/v1.x/guide/basics.html Node

60. Call back http://docs.libuv.org/en/v1.x/guide/basics.html 
    

61. I/O
    
    

62.  https://www.slideshare.net/saghul/libuv-nodejs-and-everything-in-between GTSFBE'JMF &7@4&5

63.  https://www.slideshare.net/saghul/libuv-nodejs-and-everything-in-between Կ΋৮Ε͍ͯ ͳ͍

64. Node.jslibuv  
      
    
    

65.     

66. 
    

67. 
     

68.          

      N o d e. js 

69. 
    
     https://www.slideshare.net/saghul/libuv-nodejs-and-everything-in-between $ ΁ͷόΠ ϯσΟϯά $PEF δϟϯϓ ͍ͨ͠

70. 
    
     https://www.slideshare.net/saghul/libuv-nodejs-and-everything-in-between $ ΁ͷόΠ ϯσΟϯά $PEF δϟϯϓ ͍ͨ͠ ͭΒ͍

71. fs.readFile
     https://www.slideshare.net/saghul/libuv-nodejs-and-everything-in-between "TZOD3FBEͳ ʹͯ͠Δͷʁ ˞͜Ε͸·ͩɺ ௥͑͹Θ͔Δ

72. node-main.cc
     https://www.slideshare.net/saghul/libuv-nodejs-and-everything-in-between MJCVW΁ͷ XBUDIFS͸Ͳ ͜Ͱఆٛʁ

73. Node
    
     https://juejin.im/post/5dd0b1fff265da0bae519ed4 ˞தࠃޠͷυΩϡϝ ϯτΛ(PPHMF຋༁ ͯ͠ಡΜͰΔ

74. 
    Ginza.js
      ଟ෼͜ͷลʹ͍Δ

75.  Ginza.js   ଟ෼͜ͷลʹ͍Δ 
      mm

76.  • Node.js "
    C10K%() • .' 0
    I/O-$ 

    • -$I/O &
    OS # */,!libuv+

77.  • 12/23  
     •