Manual switch over for maintenance

Question

Hi experts:
Following are the steps for Manual Switch over from primary to standby
connect /@PRIM as sysdba
ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY WITH SESSION SHUTDOWN;
connect /@STAN as sysdba
ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;
ON previous primary
SHUTDOWN IMMEDIATE;
SQL>STARTUP MOUNT;
New Primary (previous stand by )
ALTER DATABASE OPEN;
I have primary & standby with protection mode maximize availability
How can I vice versa the above process lets say my primary is down for maintenance & i want this as my primary again ?
one more thing is that reports are generated from standby right now so it mean active dg is configured.
Regards

Answer 1

Hello;
Try to remember if you databases are in sync its kind of like having one database in two different roles, Primary role and Standby role.
Also if you want to do maintenance then don't issue this command after switchover, wait until the maintenance is complete and then issue it and Data Guard will catch up :
alter system set log_archive_dest_state_2=enable;Once you have done a switchover its a good idea to do a log switch and make sure the new primary and standby are working correctly. Once you have done that the step to switch back are as follows : ( Do not use if you have Data Guard Broker setup )
h3. Verify that it is possible to perform a switchover operation.
SQL> select switchover_status from v$database;
Note:All v$database switchover_status values are shown at the bottom of this page.
If SWITCHOVER_STATUS returns SESSIONS ACTIVE then you should either
disconnect all sessions manually or when performing step 2 you should append
the with session shutdown clause. For example:
SQL> alter database commit to switchover to standby with session shutdown;h3. Convert the primary database to the new standby
SQL> alter database commit to switchover to standby with session shutdown;
Note: This might take a few minutes.h3. Shutdown the former primary and mount as a standby database
SQL> shutdown immediate
Note: An ORA-01507: database not mounted is normal
SQL> startup nomount
SQL> alter database mount standby database;h3. Defer the remote archive destination on the old primary
SQL> alter system set log_archive_dest_state_2=defer;h3. Verify that the physical standby can be converted to the new primary
QL> select switchover_status from v$database;
SWITCHOVER_STATUS
TO PRIMARY
Note that if the status returns SESSIONS ACTIVE then you should append the with session shutdown clause to the command in step 6.h3. Convert the physical standby to the new primary ( step 6 )
SQL> alter database commit to switchover to primary;h3. Shutdown and startup the new primary
SQL> shutdown immediate
ORA-01109: database not open
SQL> startuph3. Enable remote archiving on the new primary to the new standby
SQL> alter system set log_archive_dest_state_2=enable;h3. Start managed recover on the new standby database
SQL> recover managed standby database disconnect;
Media recovery complete.
SQL>
Note: It’s a good idea to perform a log switch on the new primary.
SQL>alter system switch logfile;Best Regards
mseberg