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Introduction to ZeroMQ messaging library
- 1. Introduction to ZeroMQ 1 December 2011 Pieter Hintjens, iMatix
- 6. It had to be really fast and really simple
- 8. Many kinds of connection patterns
- 10. Fast (8M msg/sec, 30usec latency)
- 11. Small (20K lines of C++ code)
- 12. Open source LGPL (large community)
- 13. ØMQ Hello World import org.zeromq.ZMQ; public class hwclient { public static void main (String[] args){ ZMQ.Context context = ZMQ.context (1); ZMQ.Socket socket = context.socket (ZMQ.REQ); socket.connect ("tcp://localhost:5555"); socket.send ("Hello", 0); System.out.println (socket.recv(0)); } } import org.zeromq.ZMQ; public class hwserver { public static void main (String[] args) { ZMQ.Context context = ZMQ.context(1); ZMQ.Socket socket = context.socket(ZMQ.REP); socket.bind ("tcp://*:5555"); while (true) { byte [] request = socket.recv (0); socket.send("World", 0); } } }
- 16. Pipeline Pattern
- 19. Processes on one box (ipc://)
- 20. Processes on one network (tcp://)
- 25. Multicast (PUB)
- 26. Fair-queuing (REP, SUB, PULL, DEALER)
- 28. Unicast (PAIR)
- 30. One socket connect to many sockets
- 31. Queuing at sender and receiver
- 33. Zero-copy for large messages
- 35. Design app as message-driven tasks
- 36. Each task reads from 1..n sockets
- 37. Tasks can talk over inproc://
- 38. Tasks can be split into processes over tcp://
- 39. No wait states, no locks, full CPU use
- 40. Scalable to any number of cores
- 42. Move to faster language where needed (C)
- 43. Run on arbitrary platforms (Windows, Android)
- 44. Scale to arbitrary sizes (2 cores, 16 cores...)
- 45. No per-core or per-seat licensing
- 46. Easy to experiment and learn
- 48. Small protocols for main flows
- 49. ØMQ patterns for main flows
- 50. Break components up for performance
- 51. Profile and test
- 52. Improve incrementally over many cycles
- 54. 2004 – AMQP standard for JPMorganChase
- 55. 2005 – OpenAMQ message broker/client
- 56. 2008 – ØMQ/0.x for the avant-garde
- 57. 2009 – ØMQ/1.x for pioneers (finance)
- 58. 2010 – ØMQ/2.x for early adopters (foss)
- 59. 2011 – ØMQ/3.x for mass market (cloud)
- 61. 1,000 people on dev list, 120 on IRC
- 63. Language bindings (35 or more)
- 66. zero.mq – community wiki
- 67. #zeromq – IRC channel on Freenode
- 68. zeromq-dev – email list on zeromq.org
- 69. github.com/zeromq – git repositories
- 70. zguide.zeromq.org – user guide
- 71. api.zeromq.org – reference manual