Introduce the high performance queue mechanism in JAVA (2019/7/30)

1. Disruptor
By Viney

2. What's that?

3. Like:
syslog
fluentd

4. Speed = Money

6. PubSub model

8. Data in
Queue
related to policy

9. End to end Latency
= computational time + latency of moving data

10. Blocking Queue
4 array-based
4 linked list based

11. Racing issue

13. Synchronization
Lock

14. Issues4 Repeatedly accessing data in memory
4 Not cache-friendly

36. Performancehttps://colobu.com/2016/07/22/using-go-disruptor/
4 Java Disruptor : 183486238 ops/s
4 go-disruptor : 137931020 ops/s
4 go channel : 6995452 ops/s

37. What if we have a slow consumer?
4 batching effect
4 multiple consumers

39. What if the buffer is constantly full?
4 enhance ring size
4 seperate producers
4 multiple Disruptors

40. When to use it?
4 low latency required

41. reference4 https://lmax-exchange.github.io/disruptor/files/
Disruptor-1.0.pdf
4 https://github.com/smartystreets-prototypes/go-
disruptor

42. Q&A