【练习】增加控制文件至三个

1.查看控制文件：

SQL> select name from v$controlfile;

NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/ORA11GR2/control01.ctl
/u01/app/oracle/fast_recovery_area/ORA11GR2/control02.ctl

2.增加控制文件：

SQL> alter system set control_files=
  2  '/u01/app/oracle/oradata/ORA11GR2/control01.ctl',
  3  '/u01/app/oracle/fast_recovery_area/ORA11GR2/control02.ctl',
  4  '/u01/app/oracle/oradata/ORA11GR2/control03.ctl' scope=spfile;

System altered.

3.[关库]操作系统拷贝控制文件

SQL> !cp /u01/app/oracle/oradata/ORA11GR2/control01.ctl /u01/app/oracle/oradata/ORA11GR2/control03.ctl

4.起库

SQL> startup
ORACLE instance started.

Total System Global Area  830930944 bytes
Fixed Size                  2257800 bytes
Variable Size             536874104 bytes
Database Buffers          289406976 bytes
Redo Buffers                2392064 bytes
Database mounted.
Database opened.

5.查看控制文件：

SQL> select name from v$controlfile;

NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/ORA11GR2/control01.ctl
/u01/app/oracle/fast_recovery_area/ORA11GR2/control02.ctl
/u01/app/oracle/oradata/ORA11GR2/control03.ctl