Heterogeneous Warm Standby for Oracle

A warm standby application is a pair of databases, one of which is a backup copy of the other. Client applications update the active database; Replication Server maintains the standby database as a copy of the active database.

If the active database fails, or if you need to perform maintenance on the active database or on the data server, a switch to the standby database allows client applications to resume work with little interruption.

To keep the standby database consistent with the active database, Replication Server reproduces transaction information retrieved from the active database’s transaction log. Subscriptions are not needed to replicate data into the standby database.