How do you do a Data Guard switchover?

Perform the Data Guard Switchover.

1. Check the Primary Site.
2. Check the Standby Site.
3. Execute the switchover to reverse the roles in each of the sites.
4. SQLPlus can be used to confirm the role change.
5. Data Guard database role changes and Delphix.

How do you do switchover in Data Guard using Dgmgrl?

Data Guard switchover with dgmgrl

1. Ensure SPFILE is used.
2. Verify dmon process is running and broker parameters viz.
3. Check if LOCAL_LISTENER is set(This is needed only if you are non-default port other than 1521)
4. Verify if GLOBAL_DBNAME in listener.ora is set correctly to.
5. Verify if START_OPTIONS is set to MOUNT in the OCR.

What is switchover and failover in Data Guard?

A switchover is a role reversal between the primary database and one of its standby databases. A switchover guarantees no data loss. A failover is when the primary database (all instances of a RAC primary database) fails and one of the standby databases is transitioned to take over the primary role.

What is switchover and failover?

The main difference between switchover and failover Oracle Data Guard is that Switchover requires human intervention, while failover occurs automatically without warning. In brief, switchover converts to the standby database manually while failover converts to the standby database automatically during a failure.

What is Data Guard broker?

Oracle Data Guard Broker is a centralized framework that automates the configuration, management, and monitoring of an Oracle Data Guard configuration. Oracle Data Guard Broker further enhances Oracle RAC by providing apply instance failover for Oracle RAC standby databases.

How do I change my primary database to standby?

Perform the following steps on the old primary database:

1. Issue the following statement on the old primary database: SQL> ALTER DATABASE CONVERT TO PHYSICAL STANDBY;
2. Shut down and restart the database: SQL> SHUTDOWN IMMEDIATE; SQL> STARTUP MOUNT;

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 setup a 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.

What is the difference between Active Data Guard and Data Guard?

The main difference between Oracle Data Guard and Active Data Guard is that Oracle Data Guard is an extension to the Oracle RDBMS that provides data availability and protection while Active Data Guard is an extension of Oracle Data Guard that improves the production database performance for critical transactions.

What is fast start failover Data Guard?

What is failover process?

The failover process ensures that a standby server in the group assumes the role of primary server, and continues to provide access to your data. The failover process can occur automatically or manually.

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.

What do you need to know about Data Guard switchover?

When talking about Switchover, you can see it as a controlled process that is executed to change the roles between the primary and secondary (standby) site. It is done in a controlled manner and the key is that during this process there is no data loss.

How to switch from Data Guard to physical standby?

This document will detail a switchover using the Data Guard Command Line Interface. If you would like to see the steps for switchover using a manual method see the post Data Guard Switchover to a Physical Standby.

Can a switchover target be a standby database?

SWITCHOVER VERIFY WARNING: switchover target has no standby database defined in LOG_ARCHIVE_DEST_n parameter. If the switchover target is converted to a primary database, the new primary database will not be protected.

When to use a switchover or failover operation?

For example, if all your physical standbys are also unavailable, then failing over to a logical standby is your only choice. A switchover is a role reversal between the primary database and one of its standby databases. A switchover guarantees no data loss and is typically done for planned maintenance of the primary system.