day10_控制文件

---------------------验证互为镜像功能---------------------

窗口1

cd /oracle/app/oradata/ecom

rm control03.ctl 

窗口2

SQL> startup force;

ORACLE instance started.

Total System Global Area  285212672 bytes

Fixed Size                  1218992 bytes

Variable Size              92276304 bytes

Database Buffers          188743680 bytes

Redo Buffers                2973696 bytes

ORA-00205: error in identifying control file, check alert log for more info

【加载到Nomount状态时，读取参数文件，在参数文件中，指向控制文件，有3个控制文件。】

窗口1

cp control01.ctl control03.ctl 

窗口2

alter database mount;

alter database open;

控制文件复制回来，正常了，验证了镜像功能

---------------------------多路复用------------------------------------

窗口1

SQL> alter system set control_files ='/oracle/app/oradata/ecom/control01.ctl','/home/oracle/ctrl02.ctl' scope=spfile;

窗口2

cp /oracle/app/oradata/ecom/control01.ctl /home/oracle/ctrl02.ctl

窗口1

SQL> shutdown immediate;

窗口2

rm control02.ctl control03.ctl

窗口1

SQL> startup

SQL> show parameter control_files;

来自为知笔记(Wiz)