Tablespace altered.
6. 设置cluster_database=true :
SQL> alter system set cluster_database=true scope=spfile;
System altered.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
7. 启动所有实例：
[oracle@rac1 trace]$ srvctl start database -d RACDB
[oracle@rac1 trace]$ srvctl status database -d RACDB
Instance RACDB1 is running on node rac1
Instance RACDB2 is running on node rac2