Oracle Data Guard 11g Handbook

CHAPTER 14Deployment Architectures

One of the most important things this book has sought to accomplish is to show how Data Guard is more than just a solution for disaster recovery. Data Guard also addresses requirements for high availability by offering a unique combination of high performance, functionality, and simplicity. Data Guard can boost primary database performance and response time by offloading read-only queries, reporting, and backups to a standby database. Data Guard can increase availability by enabling rapid failover to a standby database in the event that mundane events such as data corruption, critical component failure, or human error bring down the primary database—events that occur much more frequently than natural disasters. ...