Protection of Ongoing Transactions

In traditional backup approaches, if the online redo log is lost, then media recovery loses all changes after the most recent available archived redo log file or incremental backup. A recovery point objective (RPO) of a day or more that might result from a traditional approach may be unacceptable.

Recovery Appliance solves the RPO problem through a continuous transfer of redo changes to the appliance from a protected database. This operation is known as real-time redo transport. Using delta push, the Recovery Appliance is a remote destination for asynchronous redo transport services from Oracle Database 11g and Oracle Database 12c databases.

Note:

This technology is based on the real-time redo transport algorithms of Oracle Data Guard. To avoid degrading the performance of the protected database, protected databases transfer redo asynchronously to the Recovery Appliance. If a protected database is lost, zero to subsecond data loss is expected in most cases.