Performing a forced or manual failover of a CDC Replication Engine for Oracle databases
A forced or manual failover is often necessary in a clustered environment for software upgrades, maintenance, or other reasons. The tasks in the following steps must be included in your manual failover script.
Procedure
- Stop all instances of CDC Replication on the current active node with the following command: dmshutdown -I <instance_name>
- Manually failover your clustered environment with the scripts or procedures that are specific to your environment.
- Restart all instances on the new active node with the following command: dmts64 - I <instance_name>
- Start all subscriptions on the new active node with the dmstartmirror command.