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The image shows Data Guard architecture for disaster recovery between OCI and Compute Cloud@Customer with a Primary Site on the left and a Standby Site on the right. The Primary Site transmits Redo using a Redo Stream to automatically transfer redo data from the primary database to the on-premises standby datatbase.
Primary Site
Hosts multiple applications which interact with the Primary Database through PRIMARY DB HOST 1 and PRIMARY DB HOST 2.Standby Site
This on-premises site hosts multiple applications which interact with the Standby Database through STANDBY DB HOST 1 and STANDBY DB HOST 2.