How do you failover in Oracle Data Guard?

On the Oracle Data Guard Overview page in Cloud Control, select the standby database that you want to change to the primary role and click Failover. Then, on the Failover Confirmation page, click Yes to invoke the default Complete failover option.

What is Data Guard failover?

Failover is a one way process where your primary database goes down due to some reasons and to get back the production live without any loss, you convert your existing Physical Standby database to start behaving as Primary database.

What is failover and switchover?

Answer: In general, a failover is a production emergency, where the primary database has failed and you need to failover to the standby database. Conversely, a switchover is a planned switch from a standby back to the primary database, a non-emergency operation.

What is fast start failover in Oracle 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. This feature increases the availability of the database by eliminating the need for DBA involvement as part of the failover process.

How do you failover a physical standby database?

Performing failover : Step 1: Check Standby Database role. Step 2: Apply the following command to finish database recovery. SQL> alter database recover managed standby database finish; Database altered. Step 3: Use the following command to activate standby database to a primary.

How do I set up fast start failover?

High level steps to configure Data Guard Fast-Start Failover

  1. Configure Oracle Network.
  2. Prepare the primary database.
  3. Create a physical standby.
  4. Enable Flashback Database.
  5. Create a Broker configuration.
  6. Configure the observer.
  7. Enable and test FSFO.

What happens during failover?

Failover is a backup operational mode that automatically switches to a standby database, server or network if the primary system fails, or is shut down for servicing. Failover is an extremely important function for critical systems that require always-on accessibility.

What is the failover process?

Failover is the process of switching to a redundant or standby computer server, system, hardware component or network. Other terms also used to describe this capability include role-swap or switching.

How do you start fast on failover?

Configuring Fast-Start Failover

  1. Specify the target standby database.
  2. Set the protection mode.
  3. Set the FastStartFailoverThreshold property.
  4. Set additional database properties Set additional database properties.
  5. Set additional fast-start failover conditions.
  6. Enable fast-start failover.
  7. Start the observer.

What is failover time?

Failover is a backup operational mode in which the functions of a system component are assumed by a secondary component when the primary component becomes unavailable — either through failure or scheduled down time. Failover is an integral part of mission-critical systems.

How do you test for fast start on a failover?

Oracle 19c-Testing The Oracle Data Guard Fast-Start Failover

  1. Step1:-Show the configuration.
  2. Step2:-check the observer session is running to monitor the primary & standby.
  3. Step3:-kill the Smon process in primary database.
  4. Step4:- Check observer session for the failover.

What is observer in Data Guard?

An observer is a process that monitors a Data Guard configuration to initiate an automated failover if conditions warrant it. This guide covers installing the Oracle 19c database client on an observer virtual machine (VM) and configuring Fast-Start Failover.