数据库版本：11.2.0.4
系统：rhel 7.9
备库控制文件信息如下：
SQL> select db_unique_name from v$database;
DB_UNIQUE_NAME
---------------
ORCL151
SQL> show parameter control
NAME TYPE VALUE
------------------------------------ ---------------------- ------------------------------
control_file_record_keep_time integer 7
control_files string /u01/app/oracle/oradata/orcl15
1/control01.ctl, /u01/app/orac
le/fast_recovery_area/orcl150/
control02.ctl
control_management_pack_access string DIAGNOSTIC+TUNING
现在采用switchover的方式将备库其切换为主库：
主库ORCL150切换为备库
SQL> show parameter unique_name
NAME TYPE VALUE
------------------------------------ ---------------------- ------------------------------
db_unique_name string ORCL150
SQL> col name for a10
SQL> col log_mode for a15
SQL> col open_mode for a15
SQL> col database_role for a20
SQL> col switchover_status for a20
SQL> col db_unique_name for a15
SQL> select name,log_mode,open_mode,database_role,switchover_status,db_unique_name from v$database
NAME LOG_MODE OPEN_MODE DATABASE_ROLE SWITCHOVER_STATUS DB_UNIQUE_NAME
---------- --------------- --------------- --------------- -------------------- ---------------
ORCL150 ARCHIVELOG READ WRITE PRIMARY FAILED DESTINATION ORCL150
SQL> alter database commit to switchover to physical standby with session shutdown;
Database altered.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 3206836224 bytes
Fixed Size 2257520 bytes
Variable Size 1811942800 bytes
Database Buffers 1375731712 bytes
Redo Buffers 16904192 bytes
Database mounted.
SQL> select name,log_mode,open_mode,database_role,switchover_status,db_unique_name from v$database
NAME LOG_MODE OPEN_MODE DATABASE_ROLE SWITCHOVER_STATUS DB_UNIQUE_NAME
---------- --------------- --------------- -------------------- -------------------- ---------------
ORCL150 ARCHIVELOG MOUNTED PHYSICAL STANDBY RECOVERY NEEDED ORCL150
备库ORCL151切换为主库
SQL> col name for a10
SQL> col log_mode for a15
SQL> col open_mode for a20
SQL> col database_role for a20
SQL> col switchover_status for a20
SQL> col db_unique_name for a15
SQL> select name,log_mode,open_mode,database_role,switchover_status,db_unique_name from v$database
NAME LOG_MODE OPEN_MODE DATABASE_ROLE SWITCHOVER_STATUS DB_UNIQUE_NAME
---------- --------------- -------------------- -------------------- -------------------- ---------------
ORCL150 ARCHIVELOG READ ONLY WITH APPLY PHYSICAL STANDBY TO PRIMARY ORCL151
SQL> alter database commit to switchover to primary with session shutdown;
Database altered.
SQL> alter database open;
Database altered.
SQL> select name,log_mode,open_mode,database_role,switchover_status,db_unique_name from v$database;
NAME LOG_MODE OPEN_MODE DATABASE_ROLE SWITCHOVER_STATUS DB_UNIQUE_NAME
---------- --------------- -------------------- -------------------- -------------------- ---------------
ORCL150 ARCHIVELOG READ WRITE PRIMARY RESOLVABLE GAP ORCL151
现备库ORCL150打开只读实时应用模式
SQL> alter database recover managed standby database cancel;
Database altered.
SQL> alter database open;
Database altered.
SQL> alter database recover managed standby database using current logfile disconnect from session;
Database altered.
SQL> select name,log_mode,open_mode,database_role,switchover_status,db_unique_name from v$database;
NAME LOG_MODE OPEN_MODE DATABASE_ROLE SWITCHOVER_STATUS DB_UNIQUE_NAME
---------- --------------- -------------------- -------------------- -------------------- ---------------
ORCL150 ARCHIVELOG READ ONLY WITH APPLY PHYSICAL STANDBY NOT ALLOWED ORCL150
现在给原备库ORCL151增加一个控制文件：
SQL> alter system set control_files='/u01/app/oracle/oradata/orcl151/control01.ctl','/u01/app/oracle/fast_recovery_area/orcl150/control02.ctl','/u01/app/oracle/fast_recovery_area/orcl150/control03.ctl' scope=spfile;
System altered.
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> ! cp /u01/app/oracle/fast_recovery_area/orcl150/control02.ctl /u01/app/oracle/fast_recovery_area/orcl150/control03.ctl
SQL> startup
ORACLE instance started.
Total System Global Area 3206836224 bytes
Fixed Size 2257520 bytes
Variable Size 1811942800 bytes
Database Buffers 1375731712 bytes
Redo Buffers 16904192 bytes
Database mounted.
Database opened.
SQL> show parameter control
NAME TYPE VALUE
------------------------------------ ---------------------- ------------------------------
control_file_record_keep_time integer 7
control_files string /u01/app/oracle/oradata/orcl15
1/control01.ctl, /u01/app/orac
le/fast_recovery_area/orcl150/
control02.ctl, /u01/app/oracle
/fast_recovery_area/orcl150/co
ntrol03.ctl
control_management_pack_access string DIAGNOSTIC+TUNING
