How To Configure Client Failover For Data Guard Connections Using Database Services (Doc ID 1429223.1)

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Goal

In a Data Guard environment primary database is open in read write mode and the standby database in read only mode for reporting purpose.

This document describes how to setup clients to connect to Data Guard databases (primary and standby) and configure automatic client failover such that in case there is role change due to switchover or failover, the client connections should still be valid i.e. the clients that need to connect to read only standby should always connect to the current standby irrespective of which database in the Data Guard configuration is currently in standby role and same for primary connections.

This goal is achieved via database services.

In 11gR2, we have the concept of role-based database services. For Data Guard environments running older release, this is achieved via a database startup trigger.

Note: Starting from 12cR1 (12.1), you can consider using Global Data Services to seamlessly manage client connections for dataguard or Golden Gate replicated database

Also check below technical brief for latest information on this topic:

Client Failover Best Practices for Highly Available Oracle Databases
http://www.oracle.com/technetwork/database/availability/client-failover-2280805.pdf

Application Continuity with Oracle Database12c Release 2
http://www.oracle.com/technetwork/database/database-cloud/private/application-continuity-wp-12c-1966213.pdf

Solution

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