实践一:配置多个host
客户端配置多个cluster host,这样做有两个好处:
- 避免单点问题
- 客户端请求负载均衡(round-robin)
方法一、
HFactory.getOrCreateCluster("MyCluster","host1:9160,host2:9160,host3:9160")
方法二、
HFactory.getOrCreateCluster("MyCluster","host0:9160")
cluster.addHost(new CassandraHost("host1", 9160), true);
cluster.addHost(new CassandraHost("host2", 9160), true);
cluster.addHost(new CassandraHost("host3", 9160), true);
注意:addHost()方法第二个参数为true才会真正生效
--end