DATAGUARD在做SWITCHOVER切換時遇到問題總結

DATAGUARD在做SWITCHOVER切換時遇到問題總結 2014-04-21     我來說兩句    來源：DATAGUARD在做SWITCHOVER切換時遇到問題總結      我要投稿

1.主庫在進行物理主備庫角色轉換的時候遇到ORA-01093錯誤

SQL> select switchover_status from v$database;
SWITCHOVER_STATUS
--------------------
SESSIONS ACTIVE ----------有活動會話。
SQL> ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY;
ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY
*
ERROR at line 1:
ORA-01093: ALTER DATABASE CLOSE only permitted with no sessions connected

此錯誤的因為主庫中有活動的會話造成的，解決的辦法為：
1.殺掉活動會話，重新執行該命令
2.在該命令後面加上with session shutdown即
ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY WITH SESSION SHUTDOWN;

2.備庫在轉換為主庫時狀態為：NOT ALLOWED--可能需要恢復或者退出恢復模式。

SQL> select switchover_status from v$database;
SWITCHOVER_STATUS
--------------------
NOT ALLOWED
SQL> alter database commit to switchover to primary;
alter database commit to switchover to primary
*
ERROR at line 1:
ORA-16139: media recovery required
或者如下：--RECOVERY NEEDED
SQL> select switchover_status from v$database;
SWITCHOVER_STATUS
--------------------
RECOVERY NEEDED
###############
SQL> alter database recover managed standby database disconnect from session;
Database altered.
SQL> select switchover_status from v$database;
SWITCHOVER_STATUS
--------------------
TO PRIMARY
SQL> alter database commit to switchover to primary;
Database altered.

3.主庫切換為備庫後，備庫不做：alter database recover managed standby database cancel;也可以，此時已經自動斷開了，日誌中有提示：

Sun Apr 20 20:15:35 2014
Media Recovery Log /u01/app/oracle/prod/arch/1_62_844894247.dbf
Media Recovery Waiting for thread 1 sequence 63
Sun Apr 20 20:15:46 2014
Redo Shipping Client Connected as PUBLIC
-- Connected User is Valid
RFS[6]: Assigned to RFS process 19968
RFS[6]: Identified database type as 'physical standby'
RFS[6]: Archived Log: '/u01/app/oracle/prod/arch/1_63_844894247.dbf'
Sun Apr 20 20:15:50 2014
Media Recovery Log /u01/app/oracle/prod/arch/1_63_844894247.dbf
Identified End-Of-Redo for thread 1 sequence 63
Sun Apr 20 20:15:50 2014
Media Recovery End-Of-Redo indicator encountered
Sun Apr 20 20:15:50 2014
Media Recovery Applied until change 373573 ---最後應用到的SCN
Sun Apr 20 20:15:50 2014
MRP0: Media Recovery Complete: End-Of-REDO (PROD)
Resetting standby activation ID 257246883 (0xf5546a3)
Sun Apr 20 20:15:51 2014
MRP0: Background Media Recovery process shutdown (PROD)----MEDIA RECOVERY PROCESS已經關閉
Sun Apr 20 20:16:21 2014
alter database recover managed standby database cancel
Sun Apr 20 20:16:21 2014
ORA-16136 signalled during: alter database recover managed standby database cancel...

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