What is the method for setting up Oracle ADG?
To set up Oracle Active Data Guard (ADG), you need to perform the following steps:
- First, make sure you have installed the Oracle database software and successfully started the primary database.
- Create a database with an archiving schema on the primary database and enable archiving mode. Enable archiving mode using the following command:
- Enable archiving mode in the database.
- Configure the parameter file (init.ora or spfile) of the primary database to enable ADG. Use the following parameter configuration file:
- The second log archive destination is configured for asynchronous shipping to the standby database with the specified unique name and is valid for online log files in primary role. The log archive configuration includes the specified Data Guard configuration name and the unique name of the standby database.
- Make sure to replace
with the unique name of your standby database, and with the name of your Data Guard configuration. - Take a backup of the control file for the Standby Database. Run the following command on the primary database:
- Create a standby control file for the database at the specified path.
- Specify the path for the control file backup in
. - Copy the control file backup to the server of the standby database and create a directory structure on the standby database that mirrors that of the primary database.
- Create an initialization parameter file (init.ora or spfile) on the standby database.
- DB name should be the same as standby database unique name.
Standby database unique name should be the same as DB name.
Log archive configuration should be set to the specified DG configuration name.
Broker configuration files 1 and 2 should point to the respective paths. - Here,
and are the unique name of the standby database and the name of the Data Guard configuration, respectively. And is the path to the Data Guard Broker configuration file. - Run an instance of the backup database.
- Start the data service without mounting any databases using the initialization file located at ‘
‘. - Here,
is the path to the initialization parameter file that was just created. - Back up the control file of the standby database using RMAN (Recovery Manager) from the primary database. Run the following command on the standby database:
- RMAN> Recover the control file from the specified backup location.
- Specify the path for the control file backup in
. - Mount the standby database.
- Mount the standby database on the database.
- Run RMAN to automatically backup the primary database and transfer the backup to the standby database. Execute the following command on the primary database:
- Set the backup type to copy for disk devices and backup the database to the specified path.
- Specify the storage location of the backup file in
. - Enable log application services on the primary database.
- Switch the database to the physical standby database.
- Start the log application service on the backup database.
- The database will be recovered using the current logfile while disconnecting from the session.
By doing this, you have successfully set up Oracle Active Data Guard. The standby database will automatically use the archived logs from the primary database to stay in sync.
