How to make the transition to digital in 10g

Hi all

We have 10g database of primary and standby, I have never worked before sleep, customer wants me start switch, can you please let me know how to make the transition to digital in 10g.

Thank you very much.

It's the way I'm following passage in the
------------------------------------------------------------

(1) check that there is no active users connected to databases.
(2) select message from v$ dataguard_status;
(3) select protection_mode from database v$.

Step 1 check if it is possible to perform a failover.

SQL > select database_role, db_unique_name, SWITCHOVER_STATUS, v database name $;

DATABASE_ROLE DB_UNIQUE_NAME SWITCHOVER_STATUS NAME
---------------- ------------------------------ -------------------- ---------
PRIMARY OFMSREGT_SIM UNAUTHORIZED OFMSREGT

SQL >

If you get NO allow status for SWITCHOVER_STATUS, verify that the standby database is connectivity.

If the SWITCHOVER_STATUS column displays ACTIVE SESSIONS, you can successfully achieve a failover by adding the WITH clause LOGOFF to the statement ALTER DATABASE COMMETTRE through PHYSICAL standby

Step 2 open the passage on the primary database.

SQL > SHUTDOWN IMMEDIATE;
SQL > STARTUP MOUNT;
SQL > ALTER DATABASE COMMIT TO SWITCH STANDBY MODE PHYSICAL;

Step 4, check the transition state in the view V$ DATABASE.

SQL > SELECT SWITCHOVER_STATUS FROM V$ DATABASE;
SWITCHOVER_STATUS
-----------------
TO_PRIMARY
1 selected line

Step 5 place yourself in the role of physical standby database target the main role.

You can switch a standby database physical role ensures the primary role
When the standby database instance is mounted mode redo apply or open
for read-only access

SQL > ALTER DATABASE COMMIT AT THE GRADE CROSSING;

Step 6 complete the transition of the database ensures the main role.

If the physical standby database has not been opened in read-only mode since the
the last time it was started, run the SQL ALTER DATABASE OPEN to open
the new primary database:

SQL > ALTER DATABASE OPEN;

If the physical database was opened read only since the last
time it was launched, you must close the database waiting for target and restart:

SQL > SHUTDOWN IMMEDIATE;
SQL > STARTUP;

Note: There is no need to close and restart other bases before (not involved in the digital switchover) who are online at the time of the failover. These databases on hold will continue to
function normally once the failover is completed.

Step 7 if necessary, restart log apply services on standby databases.
He must deliver the command FRO repeat apply as:
SQL > change database recovery managed standby database disconnect from the session.
or
And stop repeating applies to give
SQL > alter database recover managed standby database cancel;

Step 3 Shut down and restart the former primary instance.

SQL > SELECT OPEN_MODE FROM V$ DATABASE;

Step 9 check the synchronization between the primary and standby:

Primary
SQL > select thread #, max(sequence#) in v$ archived_log where archived = 'YES' group by thread #;

Sleep mode
SQL > select thread #, max(sequence#) in v$ archived_log in case of application = 'YES' group by thread #;

Stop the former primary instance and restart and mount the database:

Sense of SWITCHOVER_STATUS
--------------------------------------------
The column SWITCHOVER_STATUS of v$ database can have the following values:

NOT ALLOWED - this is a database of pending and the primary database has
not been first switched, or it's a back-end database and there is no data pending.

ACTIVE SESSIONS - indicates that there are active sessions of SQL attached to
the primary database or emergency that must be disconnected before the
failover operation is allowed.

Transition to THE PENDING - this is a database of relief and the primary database
application of the digital switchover has been received but untreated.

LATENT pass - the digital switchover has been waiting mode, but has not completed
and I went back to the primary database.

Primary SCHOOL - this is a database of pending, any sessions active, i.e.
allows to switch to a primary database.

In STANDBY mode - this is a primary database, any sessions active, i.e.
allows to switch to a standby database.

RECOVERY NEEDED - this is a database of pending that has not received the
application of the digital switchover.

Tags: Database

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How to make the transition to digital in 10g

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