Definitions for "Standby database"
A standby database maintains a copy of the production database in a permanent state of recovery. If the production database fails, the standby database can be opened with a minimum amount of recovery necessary.
a complete copy of your primary database, but it is constantly in recovery mode
a copy of the primary database that can be brought online with minimum delay when needed
Keywords:  guard, oracle, data, see
See Oracle9i Data Guard.