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  
     •