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