This image shows an stretched cluster topology across two Oracle Cloud Infrastructure (OCI) regions (primary and standby), highlighting the WebLogic domain and WebLogic clusters that include the applicaton hosts in both regions.

The architecture has the following components:

• Region 1 (Primary): Includes a single virtual cloud network (VCN) with a dynamic routing gateway (DRG) to facilitate remote peering and 4 subnets:
  • Web tier Subnet: Oracle Cloud Infrastructure Load Balancer manages traffic to WebHost1 and WebHost2.
  • Midtier Subnet: AppHost1 and AppHost2 run the application tier.
  • Shared Storage Subnet: Oracle Cloud Infrastructure File Storage provides shared storage.
  • Database Subnet: DBHost1 and DBHost2 host the primary database (Primary DB).
• Region 2 (Standby): Includes a single virtual cloud network (VCN) with a DRG to facilitate remote peering and 4 subnets:
  • Web tier Subnet: OCI Load Balancer manages traffic to WebHost3 and WebHost4.
  • Midtier Subnet: AppHost3 and AppHost4 run the application tier.
  • Shared Storage Subnet: OCI File Storage provides shared storage.
  • Database Subnet: StandbyDBHost1 and StandbyDBHost2 host the standby database (Standby DB).
• Connectivity and data movement
  • WebLogic domain and WebLogic clusters include the applicaton hosts in both regions and facilitate writing data to the primary database in Region 1.
  • frontend.example.com directs requests to OCI Load Balancer in each region.
  • Remote peering links the DRG in Region 1 with the DRG in Region 2.
  • Oracle Data Guard replicates from the primary database to the standby database.