工作总结35 Oracle RAC的tnsnames.ora参数详解

Oracle  RAC 同时具备HA(High Availiablity) 和LB(LoadBalance). 而其高可用性的基础就是Failover(故障转移). 它指集群中任何一个节点的故障都不会影响用户的使用，连接到故障节点的用户会被自动转移到健康节点，从用户感受而言， 是感觉不到这种切换。

实例：

jdbc:oracle:thin:@  (DESCRIPTION =
    (LOAD_BALANCE = OFF)
    (FAILOVER = ON)
    (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.8.130)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.8.131)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = cwdb)
      (FAILOVER_MODE =
           (TYPE = session)
           (METHOD = basic)
           (RETRIES = 180)
    &nbs