what is the difference between switchover and failover in firing

A switchover is a role reversal between the primary database and one of its standby databases. ... 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.

1. What is failover process?
2. How do you failover a dataguard?
3. What is fast start failover?
4. How do you use DR drill in Oracle?
5. What is a failover test?
6. How long will a failover typically complete?
7. How do I switch from primary to standby database using Dgmgrl?
8. How do I change my database role from standby to primary?
9. What is Oracle FSFO?
10. How do I disable fast-start on failover?
11. What is switchover and failover in dataguard?
12. How do I connect to Dgmgrl?

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 you failover a dataguard?

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.

What is fast start failover?

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 use DR drill in Oracle?

DR Drill in Manual standby Database by manual log shipping

1. 1) Login into the Production Application Server and stop application services. ...
2. 3) Login as SYSDBA and transfer all the archived logs to DR Database server, and it should be in sync,by doing the log shipping activity from production to standby DB.

What is a failover test?

Failover testing is a testing technique that validates a system's ability to be able to allocate extra resource and to move operations to back-up systems during the server failure due to one or the other reasons.

How long will a failover typically complete?

Failover times are typically 60–120 seconds. However, large transactions or a lengthy recovery process can increase failover time. When the failover is complete, it can take additional time for the RDS console to reflect the new Availability Zone. You can force a failover manually when you reboot a DB instance.

How do I switch from primary to standby database 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.

How do I change my database role from standby to primary?

Activate physical standby database

1. Step 1 (Optional) Identify and resolve any gaps in the archived redo log files. ...
2. Step 2 Initiate the failover operation on the target physical standby database. ...
3. Step 3 Convert the physical standby database to the primary role. ...
4. Step 4 Shut down and restart the new primary database.

What is Oracle FSFO?

Fast Start Failover is a feature available through oracle dataguard broker which performs an automatic failover to the chosen standby database in case of a primary database crash. FSFO involves an OBSERVER component which runs on a different machine than that of the primary and the standby database.

How do I disable fast-start on failover?

Deactivating Fast-Start Failover

To deactivate Fast-Start Failover, all I need to do is issue the DISABLE FAST_START FAILOVER command from within a DGMGRL session: DGMGRL> DISABLE FAST_START FAILOVER; Disabled.

What is switchover and failover in dataguard?

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.

How do I connect to Dgmgrl?

ADD - Adds a standby database to the broker configuration.

1. DGMGRL> ADD DATABASE db_name [AS CONNECT IDENTIFIER IS conn_identifier] [MAINTAINED AS PHYSICAL|LOGICAL];
2. DGMGRL> CONNECT username/password[@connect_identifier]
3. DGMGRL> CONVERT DATABASE database_name TO SNAPSHOT STANDBY|PHYSICAL STANDBY;