Oracle Database Online Documentation 11g Release 2 (11.2)
Maximize database availability using Oracle Data Guard and other technologies.
Maximize availability of Oracle databases using Data Guard to provide failover capabilities.
Backup and Recovery
Enhance database availability using the full range of backup and recovery capabilities of the Oracle database, such as Recovery Manager and the flashback features.
Oracle Streams enables the propagation and management of data, transactions and events within and among databases.
Advanced Replication can be used as part of maximizing database availability by reproducing your database at multiple sites.