[Wroc_Love.rb 2018] Cables! Cables! Cables!

Video: https://www.youtube.com/watch?v=AUxFFOehiy0

Links:
- http://anycable.io
- https://twitter.com/any_cable
- https://twitter.com/palkan_tula
- https://github.com/palkan/litecable
- http://www.plezi.io
- https://twitter.com/palkan_tula
- https://evilmartians.com/chronicles

Transcript

1. CABLES! CABLES! CABLES! Vladimir Dementyev
2. Vladimir Dementyev
3. ! Moscow # Wrocław
4. @palkan @palkan_tula
6. EVIL MARTIANS
7. EVIL MARTIANS
9. WHY I’M HERE
10. THE TALK Action Cable pros & cons The tale of Action Cable Alternative cables for Rails and non-Rails
11. CABLES Tools for building real-time applications Intro
12. REAL-TIME Messaging (i.e. chats) Notifications Live updates Online games Other
13. RUBY CABLES *based on https://www.ruby-toolbox.com/categories/HTTP_Pub_Sub
14. RUBY CABLES
15. © https://twitter.com/erneestoc/status/974485805770072064
16. THE RED RUBY PILL?
17. Part 1 RailsConf 2015 ACTION CABLE
18. IN A NUTSHELL Server Client WebSocket Client WebSocket
19. IN A NUTSHELL Server Client WebSocket Client WebSocket stream C Broadcaster stream B stream A stream B
20. IN A NUTSHELL Server Client WebSocket Client WebSocket stream C Broadcaster stream B stream A stream B channel X channel Y channel Z
21. PROS & CONS
22. CABLE PROS Zero-configuration
23. CABLE PROS Zero-configuration Channels framework
24. CHANNELS class AnswersChannel < ApplicationCable ::Channel def subscribed reject_subscription unless current_user.admin? end def follow(params) stream_from "questions/ #{params['id']}" end end
25. CABLE PROS Zero-configuration Channels framework JS client that just works
26. CABLE CONS
27. CABLE CONS Lack of transport fallbacks
28. WEBSOCKETS http://caniuse.com/#search=websockets
29. CABLE CONS Lack of transport fallbacks Memory usage
30. MEMORY 20k idle connections MB 0 200 400 600 800 1 000 1 200 1 400 1 600 Go Erlang Action Cable (8x)
31. CABLE PROS Lack of transport fallbacks Memory usage Real-time performance
32. SHOOTOUT https://hashrocket.com/blog/posts/websocket-shootout
33. SHOOTOUT Client Server broadcast to all message send message back
34. SHOOTOUT Broadcast RTT 0,0s 0,8s 1,6s 2,4s 3,2s 4,0s 4,8s 5,6s 6,4s 7,2s 8,0s Number of connections 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Go Erlang Action Cable (8x) Action Cable (2x) See https://github.com/anycable/anycable/tree/master/benchmarks
36. Action Cable Low Latency Crowded Channels CABLE THEOREM
37. CABLE CONS Lack of transport fallbacks Memory usage Real-time performance CPU usage
38. CPU
39. CPU
40. WHAT ABOUT REAL LIFE? I WANT TO BELIEVE IN BENCHMARKS
41. Part 2 THE TALE OF ACTION CABLE © http://www.equipe.com
44. –Jon Stenqvist, CEO, Equipe “We've used all kind of push solutions over the years, the latest is faye, pusher, actioncable and X.”
45. EQUIPE “With Action Cable, we could easily have 20+ 1GB dynos running during the weekends, with every growing memory”
46. EQUIPE “After switching to X, we have 4 512MB dynos, very stable at ~200MB memory usage”
47. EQUIPE ActionCable: 20+ 2X (1GB) dynos X: 4 X (0.5GB) dynos
48. EQUIPE ActionCable: 20+ 2X (1GB) dynos X: 4 X (0.5GB) dynos $1000 $100
50. X = AnyCable
51. Part 3 ANYCABLE
52. ANYCABLE
53. Client (protocol) Channels Streams Server ACTION CABLE
54. Client (protocol) Channels Streams Server ACTION CABLE
55. ACTION CABLE Client (protocol) Channels Streams Server ?
56. ACTION CABLE Client (protocol) Channels Streams Server ANYCABLE
57. gRPC https://grpc.io
58. gRPC = Google RPC https://grpc.io
59. gRPC = universal RPC framework https://grpc.io
60. gRPC = HTTP/2 + protobuf https://grpc.io
61. ANYCABLE Go WS
63. ANYCABLE SERVERS anycable-go erlycable
64. CPU anycable-go erlycable action_cable
65. CPU anycable-go erlycable action_cable
66. SHOOTOUT Broadcast RTT 0,0s 0,8s 1,6s 2,4s 3,2s 4,0s 4,8s 5,6s 6,4s 7,2s 8,0s Number of connections 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 anycable-go erlycable Action Cable (8x) See https://github.com/anycable/anycable/tree/master/benchmarks
67. PLUG-N-PLAY gem 'anycable-rails', group: :production rails generate anycable config.action_cable.url = ‘ws: //example.com:3334' ./bin/anycable # => Run RPC server brew install anycable/anycable/anycable-go anycable-go -p 3334 # => Run WebSocket server
68. COMPATIBILITY Feature Status Connection Identifiers + Connection Request (cookies, params) + Disconnect Handling + Subscribe to channels + Parameterized subscriptions + Unsubscribe from channels + Subscription Instance Variables - Performing Channel Actions + Streaming + Remote Disconnect wip (planned for 0.6.0) Custom stream callbacks - Broadcasting +
69. COMPATIBILITY https://medium.com/@leshchuk/from-action-to-any-1e8d863dd4cf
70. MORE FEATURES
71. MORE FEATURES Zero-disconnect deployment
72. DISCONNECT Client Re-connect & Re-subscribe Client Disconnected ActionCable ActionCable
73. DISCONNECT WebSocket Server Client Connected Client Connected App App RPC RPC
74. DISCONNECT WebSocket Server App App gRPC App App App App Envoy Proxy * https://www.envoyproxy.io
75. MORE FEATURES Zero-disconnect deployment Metrics & Stats
76. METRICS
77. http://anycable.io
78. http://anycable.io
79. github.com/anycable @any_cable ANYCABLE
80. Part 4 BEYOND RAILS © Призрачная Колыма
81. NON-RAILS
82. github.com/palkan/litecable LITE CABLE
83. Rails-free Action Cable No deps (even ActiveSupport) Compatible with AnyCable Compatible with Action Cable clients LITE CABLE
84. module Chat class Channel < LiteCable ::Channel ::Base identifier :chat def subscribed stream_from "chat_ #{chat_id}" end end end LITE CABLE
85. run Rack ::Builder.new do map '/cable' do use LiteCable ::Server ::Middleware, connection_class: Chat ::Connection run proc { |_| [200, {}, ['']] } end end LITE CABLE
86. HANAMI CABLE http://gabrielmalakias.com.br/ruby/hanami/iot/2017/05/26/websockets-connecting-litecable-to-hanami.html
87. PLEZI CABLE
88. PLEZI Iodine–fast concurrent web server for real-time Ruby applications Rack-compatible CPU efficient Less memory than Puma/Passenger Stable?
89. plezi.io github.com/boazsegev/iodine PLEZI
90. Outro RUBY OR NOT © RailsClub Moscow
91. RUBY OR NOT WebSockets in Ruby are possible…
92. RUBY OR NOT WebSockets in Ruby are possible… …but more efficient with the help of other languages
93. ActionCable is usable… RUBY OR NOT
94. ActionCable is usable… …and fixable/replaceable if necessary RUBY OR NOT
95. DZIĘKUJĘ! Vladimir Dementyev anycable.io evilmartians.com @palkan @palkan_tula