Oracle Data Guard (三) Switchover

1．检查Primary数据库的状态SQL> select switchover_status from v$database;

只有状态为 "TO STANDBY" 或者 "SESSIONS ACTIVE" 才能对Primary数据库进行角色切换。

2．切换Primary数据库的角色SQL> alter database commit to switchover to physical standby with session shutdown;

SQL> shutdown immediate;

SQL> startup mount;

3．检查Standby数据库的状态SQL> select switchover_status from v$database;

只有状态为 "TO PRIMARY" 或者 "SESSIONS ACTIVE" 才能对Standby数据库进行角色切换。

4．切换Standby数据库的角色SQL> alter database commit to switchover to primary with session shutdown;

SQL> alter database open;

5．在新的Standby数据库启动Standby执行进程SQL> alter database recover managed standby database using current logfile disconnect from session;