1. Hazelcast
[ˈheizəlkɑ:st]
jushi@taobao.com

2. Hazelcast is an open source
clustering and highly scalable data
distribution platform for Java
-- www.hazelcast.com

3. Get started from code example
从代码入手

5. Map.put(key, value) =>
partitions[hash&mod(key)]
.addEntry(key, value)

6. Map.put(key, value) =>
partitions[hash&mod(key)]
.getOwner()
.addEntry(key, value)

7. Blocks (Partitions)
0 1 2 … 270
Hazelcast Instance (Node)

8. Map is everything
有了MAP， 就有了一切

9. Set.add(value) =>
Map.put(value, true)

10. Queue.offer(value) =>
key = Master.genKeyBy(qName)
index = Integer.MAX_VALUE
Map.put(key, value)
Master.add(key, index)

11. Queue.poll() =>
key = Master.takeKeyBy(qName)
Map.get(key)

12. http://hazelcast.googlecode.com/svn/trunk/

13. Eviction & Persistence
逐出与存储

14. enum EvictionPolicy {
LRU, LFU, NONE
}
interface MapMaxSizePolicy {
boolean overCapacity()
}

15. periodRun() =>
Records.foreach {
case isDirty(record) =>
store(record)
case isEvictable(record) =>
evict(record)
case isPurgeable(record) =>
purge(record)
}

16. interface MapStore<K, V> {...}
???

17. Cluster
集群

19. Member / Super Client
Map map = Hazelcast.getMap(“default”);
Java Client
Map map = HazelcastClient
.newHazelcastClient(“dev”, “pass”, ...)
.getMap(“default”);

20. Super Clients are members with no storage.

21. <<Master>>
Node 1 Node 2

22. Split Brain
<<Master>> <<Master>>

23. backup, migration
备份与迁移

24. (key, value)
Node 2
<<Master>>
Node 1 Node 3
Node 4

25. <<Master>>
Node 1 Node 2

26. Summary
总结

27. 应用模式
Application
Hazelcast Client Application Client
Hazelcast Instance Application
Hazelcast Instance

28. 优点 缺点
• 接口丰富 • 无存储实现
• 使用简单 • 代码复杂
• 监控完善 • 测试覆盖较低

29. In-Memory Data Grid

30. Q&A

31. References
参考

32. http://www.hazelcast.com/files/hazelcast-presentation.pdf
http://hazelcast.com/docs/1.9.4/manual/single_html/
http://www.hazelcast.com/screencast.jsp

33. Code review guide
源码导读

34. Hazelcast FactoryImpl
Node BaseManager
ClusterService ConcurrentMapManager CMap
BlockQueueManager BQ
PartitionManager ClusterManager Joiner

35. EOF