What is Data Guard broker in Oracle 11g?

Oracle Data Guard Broker is a centralized framework that automates the configuration, management, and monitoring of an Oracle Data Guard configuration. With Oracle Database 11g Release 2, seamless database role transitions are now possible with its integration of Oracle Clusterware.

What is Data Guard switchover?

Data Guard helps you change the role of a database using either a switchover or a failover: A switchover is a role reversal between the primary database and one of its standby databases. During a switchover, the primary database transitions to a standby role, and the standby database transitions to the primary role.

How do I create a Data Guard broker?

How to Create and Enable an Oracle Data Guard Broker…

1. Create an Oracle Data Guard Broker configuration for the primary database.
2. Add the standby database to the Oracle Data Guard Broker configuration.
3. Configure the apply instance for the standby database.

How do I connect to Data Guard broker?

Oracle 11gR2 – Data Guard Broker

1. Configure LISTENER. ORA.
2. Configure TNSNAMES. ORA.
3. Enable Data Guard Broker.
4. Start DGMGRL.
5. Create Data Guard Broker Configuration.
6. Add standby database(s)
7. Enable the configuration.
8. Switchover to standby.

How do I start and stop a Data Guard broker?

Use the parameter dg_broker_start to start and stop the Data Guard broker process. To start the broker, set this parameter to TRUE in the initialization parameter file and restart the database.

How do I manually remove Data Guard configuration?

1. Remove broker configuration from DGMGRL command line using sys user from primary database.
2. In primary database set the db_broker_start parameter false.
3. Check the archive log destination in primary database.
4. In standby database set the db_broker_start parameter false.

How do you do a Data Guard switchover?

Oracle 12c-Step by Step Manual Data Guard Switchover

1. Primary database:-
2. Precheck for Switchover:-
3. Step 2:-
4. Step 3:- select switchover_status from v$database;
5. Step 5:-
6. Step 6:-select name,open_mode,database_role from v$database;
7. Step 7:-alter database commit to switchover to primary;

What does failover mean?

Failover is the ability to switch automatically and seamlessly to a reliable backup system. To achieve redundancy upon the abnormal failure or termination of a formerly active version, a standby database, system, server, or other hardware component or network must always stand ready to automatically switch into action.

What is fast-start failover Data Guard?

Fast-Start Failover is a feature that allows the Oracle Data Guard broker to failover a failed primary database automatically to a predetermined standby database. Fast-Start Failover enables the broker to perform these tasks automatically in the same time that it would typically take a DBA to log into the system.

How do I stop being a Data Guard broker?

DGMGRL Stop Apply It’s to disable apply service of the standby database. DGMGRL> EDIT DATABASE ‘standby_db’ SET STATE=’APPLY-OFF’;

How do I restart my Data Guard broker?

Restart the Oracle Data Guard broker DMON process, as follows: SQL> ALTER SYSTEM SET DG_BROKER_START=TRUE; Enable the broker configuration using the DGMGRL ENABLE command or the Enable operation in the Oracle Data Guard management pages of Cloud Control.

Where is the Data Guard broker log?

Data Guard broker writes its log file in the location specified by the background_dump_dest initialization parameter. In addition to the DMON process log file, there will be a drc. log file, which contains detailed messages regarding the Data Guard broker.

How to test Oracle 11g Data Guard switchover?

Switch over activity have completed successfully, our old primary database has become standby and old standby database has become primary database. To test above switchover activity, generate multiple archive logs on primary database and verify those archive logs being transferred on standby database.

How to test the Data Guard broker configuration?

Test the Data Guard Broker configuration by issuing a SWITCHOVER command. This may take some time to complete. 2. Verify that the SWITCHOVER has successfully completed. Note that standby1 is now the primary database and orcl is now the physical standby.

How to set data guard broker dgmgrl in SQL?

On both Primary as well as Standby database start the Data Guard Broker process SQL> ALTER SYSTEM SET DG_BROKER_START=TRUE SCOPE=BOTH;System altered. Edit the listener.ora on both nodes to add a static entry for DGMGRL This is to prevent the ORA-12154 error which can be observed on startup of the standby database after performing a switchover.

Is there DataGuard broker for Oracle RAC database?

In the previous article, we have configured dataguard broker for Oracle RAC database with physical standby in 11gR2. Here, we will continue with the switchover process. Below is the environment.