Enabling Clients for Fast Connection Failover

Fast Connection Failover provides high availability to Fast Application Notification (FAN) integrated clients, such as clients that use JDBC, OCI, or ODP.NET. If you configure the client to use fast connection failover, then the client automatically subscribes to FAN events and can react to database UP and DOWN events. In response, Oracle Database gives the client a connection to an active instance that provides the requested database service.

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  • About Enabling Clients for Fast Connection Failover
    In a configuration with a standby database, after you have added Oracle Notification Services (ONS) to your Oracle Restart configurations and enabled Oracle Advanced Queuing (AQ) HA notifications for your services, you can enable clients for fast connection failover.
  • Enabling Fast Connection Failover for JDBC Clients
    Enabling FAN for the Oracle Universal Connection Pool enables Fast Connection Failover (FCF) for the client. Your application can use either thick or thin JDBC clients to use FCF.
  • Enabling Fast Connection Failover for Oracle Call Interface Clients
    Oracle Call Interface clients can enable Fast Connection Failover (FCF) by registering to receive notifications about Oracle Restart high availability FAN events and respond when events occur.
  • Enabling Fast Connection Failover for ODP.NET Clients
    Oracle Data Provider for .NET (ODP.NET) connection pools can subscribe to notifications that indicate when services are down. After a DOWN event, Oracle Database cleans up sessions in the connection pool that go to the instance that stops, and ODP.NET proactively disposes connections that are no longer valid.

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