ORACLE 12C ADG 之六 (DG 快照备用)

#物理备用数据库到快照备用数据库 (oracle 11g中的snapshot standby特性)

#查看当前备用数据库的角色

#备机

[oracle@DB196 ~]$ sqlplus / as sysdba

SQL> select open_mode,database_role from v$database;

            READ ONLY        WITH APPLY PHYSICAL STANDBY

SQL> shutdown immediate;

SQL> startup mount;

#转换物理standby到快照standby

SQL> alter database convert to snapshot standby;

SQL> select status from v$instance;

            MOUNTED

SQL> alter database open;

SQL> select open_mode,database_role from v$database;

            READ WRITE     SNAPSHOT STANDBY

SQL> select name,storage_size from v$restore_point;

            SNAPSHOT_STANDBY_REQUIRED_07/30/2018 22:18:20   209715200

           --测试是否可以修改数据库 OK

SQL> exit

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#快照备用数据库到物理备用数据库 (oracle 11g中的snapshot standby特性)

[oracle@DB197~]$ sqlplus / as sysdba

SQL> select open_mode,database_role from v$database;

            READ WRITE     SNAPSHOT STANDBY

SQL> shutdown immediate;

SQL> startup mount;

#转换快照standby 到 物理standby

SQL> alter database convert to physical standby;

SQL> shutdown immediate;

           ORA-01109: database not open

SQL> startup

SQL> alter database recover managed standby database using current logfile disconnect from session;

SQL> select open_mode,database_role from v$database;

            READ ONLY WITH APPLY PHYSICAL STANDBY