Jedis-cluster analysis principle

Connection

Set<HostAndPort> hostAndPorts=new HashSet<>();
HostAndPort hostAndPort=new HostAndPort("192.168.11.153",7000);
HostAndPort hostAndPort1=new HostAndPort("192.168.11.153",7001);
HostAndPort hostAndPort2=new HostAndPort("192.168.11.154",7003);
HostAndPort hostAndPort3=new HostAndPort("192.168.11.157",7006);
hostAndPorts.add(hostAndPort);
hostAndPorts.add(hostAndPort1);
hostAndPorts.add(hostAndPort2);
hostAndPorts.add(hostAndPort3);=
JedisCluster jedisClusternew JedisCluster(hostAndPorts,6000);
jedisCluster.set("mic","hello");

Principle Analysis

The program starts to initialize a clustered environment

1), read node configuration profile, whether it is a master-slave, no matter how many, take only a first acquiring connection instance redis

2) connected with execution examples acquired redis clusternodes () method, the actual implementation of the server cluster nodes redis command, obtain master-slave configuration Letter

interest

3) parsing the configuration information from the master, all nodes store the first set of nodes in the map, key node of ip: port, value for the current node

jedisPool

4), the master node analytical range segment allocated slots, the slot corresponding to the index value as the key, in a third step to get as jedisPool value, stored in

map set in slots

Is realized with a slot groove jedisPool mapping index value, the node information contains jedisPool the master, the groove and the corresponding points, and

redis server consistent

Access from a cluster environment values

1), as the key parameter, performing CRC16 algorithm, the key slot corresponding to the value of

2), through which slot value, a set of slots in the map to obtain jedisPool Examples

3) obtaining jedis instance via jedisPool example, the final data access work is completed redis