Dataguard a summary of problems when doing switchover switching

1. The main library encountered a ORA-01093 error while carrying out a physical master repository role conversion

Sql> select Switchover_status from V$database;

Switchover_status

--------------------

SESSIONS Active----------has active sessions.

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 to permitted with no sessions connected

This error is due to an active session in the main library, which can be resolved by:

1. Kill the active session and execute the command again

2. After the command plus the session shutdown that

ALTER DATABASE COMMIT to switchover to physical STANDBY with session SHUTDOWN;

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2. The standby library is converted to the primary library in a state of: not allowed--may need to restore or exit the recovery mode.

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

Or as follows:--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. When the main library is switched to standby, the repository does not do this: ALTER DATABASE recover managed standby database cancel;

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---last applied to the 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 has been closed

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 ...