DATAGUARD FAILOVER WITH FLASHBACK DATABASE

On Primary
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Defer the log shipping to standby.

SQL> Alter system set log_archive_dest_state_n=defer;

Check last log sequence Select max(sequence#) from v$log_history

On Satndby
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Enable flashback recovery.

Setup flashback destination and file size.

SQL> Alter system set db_recovery_file_dest=’/u01/flash’ scope=spfile;
SQL> Alter system set db_recovery_file_dest_size=10G scope=spfile;

Cancel the recovery.

SQL> Alter database recover managed standby database cancel;

SQL> Shutdown immediate

Startup database in mount mode.
SQL> Startup mount

Put database in the flashback mode
SQL> alter database flashback on;

Create the Restore Point on the standby database
SQL> Create restore point before_dr guarantee flashback database;

Activate Standby database
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SQL> Alter database activate standby database;

Open the DR database

SQL> Alter database open;

Shutdown and restart the database

--- Perform DR tests ---

Steps to rollback and convert to standby.

On Satndby

Shutdown after DR test

SQL>Shutdown immediate

Startup database with mount and force option.

SQL>startup mount force

Restore database to the restored point.

SQL> Flashback database to restore point before_dr;

Drop restored point

SQL> Drop restore point before_dr;

Turn off flashback

alter database flashback off;

Convert database to physical standby

SQL> Alter database convert to physical standby;

shutdown and startup in standby mode

SQL> Shutdown immediate
SQL> startup nomount
SQL> Alter database mount standby database;
SQL> Alter database recover managed standby database disconnect from session;

On Production
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Enable the log shipping to standby.

SQL> Alter system set log_archive_dest_state_4='enable';

switch logg and verify the apply.

SQL> alter system switch logfile;