Standby databases are the most frequently used and most effective disaster recovery solution for Oracle databases. Oracle9i Data Guard enhances Oracle8i Standby Databases to provide database recovery that meets the essential disaster recovery solution for Oracle databases, and also survives mistakes, corruptions, and disasters such as earthquakes and hurricanes.
This guide describes Oracle9i Data Guard concepts and helps you configure and implement standby databases that can take over production operations if your primary database becomes unusable.