6 Switchover and Failover Operations

Learn how to use Oracle Data Guard broker to manage databases during switchover and failover.

• Overview of Switchover and Failover in a Broker Environment

• Choosing a Target Standby Database

• Switchover

• Manual Failover

• Fast-Start Failover

• Database Client Considerations

• Overview of Switchover and Failover in a Broker Environment
  Oracle Data Guard helps you change the role of databases between primary and standby using either a switchover or failover operation.
• Choosing a Target Standby Database
  When you select a standby database to be the next primary database after a switchover or a failover, there are several factors to consider.
• Switchover
  A switchover is a role reversal between the primary database and one of its standby databases.
• Manual Failover
  In a manual failover, you convert a standby database to a primary database because the original primary database failed and there is no possibility of recovering the primary database in a timely manner.
• Fast-Start Failover
  Fast-start failover allows the broker to automatically fail over to a previously chosen standby database in the event of loss of the primary database.
• Database Client Considerations
  Event notification and database connection failover support is available to database clients connected to local database services when a broker-managed failover occurs.