1.物理Standby从ＳＨＵＴＤＯＷＮ状态启动到READ ONLY状态
ORCLPDG >select open_mode from v$database;

OPEN_MODE
----------
READ ONLY
启动之后默认是READ ONLY状态。

ORCLPDG >alter database recover managed standby database cancel;
alter database recover managed standby database cancel
*
ERROR at line 1:
ORA-16136: Managed Standby Recovery not active

之前没有启动ＲＥＤＯ应用，现在来取消此应用肯定会出错。
２.从READ ONLY状态到ＲＥＤＯ应用状态
ORCLPDG >alter database recover managed standby database disconnect from session;

Database altered.

ORCLPDG >select open_mode from v$database;

OPEN_MODE
----------
MOUNTED
３.取消ＲＥＤＯ应用，到READ ONLY状态
ORCLPDG >alter database recover managed standby database cancel;

Database altered.

ORCLPDG >select open_mode from v$database;

OPEN_MODE
----------
MOUNTED

ORCLPDG >alter database open;

Database altered.

ORCLPDG >select open_mode from v$database;

OPEN_MODE
----------
READ ONLY
管理影响Ｓｔａｎｄｂｙ的Ｐｒｉｍａｒｙ数据库事件
创建表空间或数据文件：
ORCLPRE >conn sys/safe@orcl_192.168.1.222 as sysdba
Connected.

ORCLPDG >conn sys/safe@orcls_192.168.1.223 as sysdba
Connected.

１.standby_file_management：auto
ORCLPDG >show parameter standby_file_management

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
standby_file_management string auto
ORCLPRE >create tablespace pri_tbs datafile '/u01/app/oracle/oradata/orcl/pri.dbf' size 10m;

Tablespace created.

ORCLPRE >col tsname for a20
ORCLPRE >col dfname for a50
ORCLPRE >select ts.name tsname,df.name dfname from v$tablespace ts,v$datafile df where ts.ts#=df.ts#;

TSNAME DFNAME
-------------------- --------------------------------------------------
SYSTEM /u01/app/oracle/oradata/orcl/system01.dbf
UNDOTBS1 /u01/app/oracle/oradata/orcl/undotbs01.dbf
SYSAUX /u01/app/oracle/oradata/orcl/sysaux01.dbf
USERS /u01/app/oracle/oradata/orcl/users01.dbf
EXAMPLE /u01/app/oracle/oradata/orcl/example01.dbf
RMANTBS /u01/rec_catalog/rmantbs.dbf
PRI_TBS /u01/app/oracle/oradata/orcl/pri.dbf

7 rows selected.

ORCLPRE >alter system switch logfile;

System altered.
Ｓｔａｎｄｂｙ：
ORCLPDG >col dfname for a50
ORCLPDG >col tsname for a20
ORCLPDG >select ts.name tsname,df.name dfname from v$tablespace ts,v$datafile df where ts.ts#=df.ts#;

TSNAME DFNAME
-------------------- --------------------------------------------------
SYSTEM /u01/app/oracle/oradata/orclstd/system01.dbf
UNDOTBS1 /u01/app/oracle/oradata/orclstd/undotbs01.dbf
SYSAUX /u01/app/oracle/oradata/orclstd/sysaux01.dbf
USERS /u01/app/oracle/oradata/orclstd/users01.dbf
EXAMPLE /u01/app/oracle/oradata/orclstd/example01.dbf
RMANTBS /u01/app/oracle/oradata/orclstd/rmantbs.dbf

6 rows selected.
未启用ＲＥＤＯ：
ORCLPDG >alter database recover managed standby database disconnect from session;

Database altered.

ORCLPDG >alter database recover managed standby database cancel;

Database altered.

ORCLPDG >select ts.name tsname,df.name dfname from v$tablespace ts,v$datafile df where ts.ts#=df.ts#;