When did Oracle start supporting standby databases? Oracle Database 7.3 is the first version to support standby databases. Was it easy to setup standby database in oracle database 7.3? It wasn't so easy, because all the redo log application steps had to be performed manually What was the improvement in Oracle database 8i? From Oracle database 8i onwards, concept of shipping and applying redo logs, opening standby database in read-only mode on finishing log application were the enhancements introduced. What features of Oracle dataguard were introduced in Oracle database 9i version? In Oracle database 9i Oracle dataguard Broker(a Command-lien interface for settingup and managing dataguard), concept of protection modes to prevent data variances between primary and secondary was introduced. Logical standby database concept was introduced in Oracle Database 9iRelease2. What was the dataguard enhancement made in ORacle database 10g? Real-time apply of redo data on physical and logical standby databases was the major enhancement made in Oracle database 10g version. What are the enhancements made to dataguard in ORacle database 11g? Active Data guard is the new feature introduced in Oracle database 11g. |