Europycon2011: Implementing distributed application using ZeroMQ

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fcrippa

Technologie Unterhaltung & Humor

Implementing distributed
applications with

...and some other bad guys...
Crippa Francesco

Scalability vs Complexity

what we want

Complexity
1 Thread 2 Threads 2 Nodes 4 Nodes

Scalability vs Complexity

reality

Complexity
1 Thread 2 Threads 2 Nodes 4 Nodes

The Ø in ØMQ

Zero Broker

Zero Latency (as close as possible...)

The Ø in ØMQ

Zero Broker

Zero Latency (as close as possible...)

Zero administration

The Ø in ØMQ

Zero Broker

Zero Latency (as close as possible...)

Zero administration

Zero cost

The Ø in ØMQ

Zero Broker

Zero Latency (as close as possible...)

Zero administration

Zero cost

Zero waste

Sockets
Unicast transports (inproc, ipc, tcp)

Sockets
Unicast transports (inproc, ipc, tcp)

Multicast transports (pgm or epgm)

Sockets
Unicast transports (inproc, ipc, tcp)

Multicast transports (pgm or epgm)

connect() and bind() are independent

Sockets
Unicast transports (inproc, ipc, tcp)

Multicast transports (pgm or epgm)

connect() and bind() are independent

They are asynchronous (with queues)

...and, of course...

Cross Platform (Linux, Windows, Mac, etc...)

Multiple Languages (c, c++, python, java,
ruby, erlang, php, perl, ada, c#, lua, scala,
objective-c, go, haskell, racket, cl, basic...)

OpenSource

if you have a laptop...

http://www.zeromq.org/

http://zguide.zeromq.org/

Publisher
Subscriber
The PUB-SUB socket pair is asynchronous

when you use a SUB socket you must set a
subscription using zmq_setsockopt and
SUBSCRIBE

"slow joiner" symptom

Workers

Always synchronize the start of the batch

The ventilator's PUSH socket distributes
tasks to workers (load balancing)

The sink's PULL socket collects results from
workers evenly (fair-queuing)

Allowed Patterns

PUB and SUB DEALER and DEALER

REQ and REP ROUTER and ROUTER

REQ and ROUTER PUSH and PULL

DEALER and REP PAIR and PAIR

DEALER and ROUTER

Built-in Devices

QUEUE (request-reply broker.)

FORWARDER (pub-sub proxy server)

STREAMER (like FORWARDER but for
pipeline ﬂows)

Dynamic Scalability...
SCA LOW
LAB
ILI
!!!! TY

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Europycon2011: Implementing distributed application using ZeroMQ

1. Implementing distributed applications with ...and some other bad guys... Crippa Francesco

2. Scalability vs Complexity

3. Scalability vs Complexity what we want Complexity 1 Thread 2 Threads 2 Nodes 4 Nodes

4. Scalability vs Complexity reality Complexity 1 Thread 2 Threads 2 Nodes 4 Nodes

5. The Q in ØMQ

9. The Ø in ØMQ

10. The Ø in ØMQ Zero Broker

11. The Ø in ØMQ Zero Broker Zero Latency (as close as possible...)

12. The Ø in ØMQ Zero Broker Zero Latency (as close as possible...) Zero administration

13. The Ø in ØMQ Zero Broker Zero Latency (as close as possible...) Zero administration Zero cost

14. The Ø in ØMQ Zero Broker Zero Latency (as close as possible...) Zero administration Zero cost Zero waste

15. Sockets

16. Sockets Unicast transports (inproc, ipc, tcp)

17. Sockets Unicast transports (inproc, ipc, tcp) Multicast transports (pgm or epgm)

18. Sockets Unicast transports (inproc, ipc, tcp) Multicast transports (pgm or epgm) connect() and bind() are independent

19. Sockets Unicast transports (inproc, ipc, tcp) Multicast transports (pgm or epgm) connect() and bind() are independent They are asynchronous (with queues)

20. Sockets Unicast transports (inproc, ipc, tcp) Multicast transports (pgm or epgm) connect() and bind() are independent They are asynchronous (with queues) They express a certain "messaging pattern"

21. Sockets Unicast transports (inproc, ipc, tcp) Multicast transports (pgm or epgm) connect() and bind() are independent They are asynchronous (with queues) They express a certain "messaging pattern" They are not necessarily one-to-one

22. ...and, of course... Cross Platform (Linux, Windows, Mac, etc...) Multiple Languages (c, c++, python, java, ruby, erlang, php, perl, ada, c#, lua, scala, objective-c, go, haskell, racket, cl, basic...) OpenSource

23. if you have a laptop... http://www.zeromq.org/ http://zguide.zeromq.org/

24. Basic Message Patterns

25.

26. Server

27. Client

28. Demo

29. Basic Message Patterns

30.

31. Server

32. Client

33. Demo

34. Publisher Subscriber The PUB-SUB socket pair is asynchronous when you use a SUB socket you must set a subscription using zmq_setsockopt and SUBSCRIBE "slow joiner" symptom

35. Basic Message Patterns

36.

37.

38. Ventilator

39. Worker

40. Sink

41. Demo

42. Workers Always synchronize the start of the batch The ventilator's PUSH socket distributes tasks to workers (load balancing) The sink's PULL socket collects results from workers evenly (fair-queuing)

43. Fair-Queuing

44. Basic Message Patterns

45. Send messages back

46.

47.

48. Demo

49. Allowed Patterns PUB and SUB DEALER and DEALER REQ and REP ROUTER and ROUTER REQ and ROUTER PUSH and PULL DEALER and REP PAIR and PAIR DEALER and ROUTER

50. Scalability

51. Scalability

52. Scalability

53. Scalability

54. A Publish-Subscribe Proxy

55.

56. Built-in Devices QUEUE (request-reply broker.) FORWARDER (pub-sub proxy server) STREAMER (like FORWARDER but for pipeline ﬂows)

57.

58. Dynamic Scalability...

59. Dynamic Scalability... SCA LOW LAB ILI !!!! TY

60. Dynamic Scalability...

61. ØMQ : Sockets = Python : C++