oracle11g ADG主备切换

1、主库

sql> select name,open_mode,switchover_status from v$database;

NAME OPEN_MODE SWITCHOVER_STATUS
--------- -------------------- --------------------
PROD1 READ WRITE TO STANDBY

sql> alter system switch logfile;

System altered.

sql> alter system archive log current;

System altered.

sql> alter database commit to switchover to physical standby with session shutdown;

Database altered.

sql> shutdown abort
ORACLE instance shut down.
sql> startup mount
ORACLE instance started.

Total System Global Area 849530880 bytes
Fixed Size 1348244 bytes
Variable Size 511708524 bytes
Database Buffers 331350016 bytes
Redo Buffers 5124096 bytes
Database mounted.
sql> select switchover_status from v$database;

SWITCHOVER_STATUS
--------------------
RECOVERY NEEDED

sql> alter database open;

Database altered.

sql> select switchover_status from v$database;

SWITCHOVER_STATUS
--------------------
TO PRIMARY

2、备库

sql> alter database commit to switchover to primary with session shutdown;

Database altered.

sql> alter database open;

Database altered.

sql> select name,switchover_status from v$database;

NAME OPEN_MODE SWITCHOVER_STATUS
--------- -------------------- --------------------
PROD1 READ WRITE TO STANDBY

3、新备库（原主库）启用实时日志应用

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

Database altered.

sql> select name,switchover_status from v$database;

NAME OPEN_MODE SWITCHOVER_STATUS
--------- -------------------- --------------------
PROD1 READ ONLY WITH APPLY NOT ALLOWED

参考链接：

https://blog.csdn.net/kadwf123/article/details/83092607

http://blog.chinaunix.net/uid-26313110-id-5748048.html