Failover is initiated when a serious problem exists on the primary database, making it inaccessible. This problem generally arises from hardware or software errors on the server or storage layer; also, a disaster may cause complete or partial loss of services. In such cases, we can convert a standby database role to primary by performing failover and continue providing it with production database service. Performing a Data Guard failover operation for production purposes is a serious consideration and needs a lot of caution. The following considerations are important in this context:
Failover decision must be taken with regard to the service Recovery Time Objective (RTO) value.
The standby database hardware must be powerful enough to sustain production load.
Multiple standby databases are recommended; this is so that data protection continues after a failover operation.
If the flashback database is not enabled on the primary database, after a failover it's not possible to include the...