Primary Region US West (Phoenix) region

Hosts two VCNs. The VCN with IP address 10.0.0.0/16 hosts a private subnet with a Firewall and a public subnet with a Load Balancer. The Firewall and load balancer connect to a DNS outside the OCI Tenancy through the internet gateway.

The second VCN has a private subnet with two app servers and an OCI File Storage and an OCI Service Gateway attached to it. The File Storage in the Primary region uses scripted replication with the File Storage in the Standby region. The second private subnet hosts the primary database which uses Active Data Guard to connect to the Standby Database in the US East Region and is set up for scheduled restoration. The two private subnets within the VCN are connected with a NAT gateway.

Both the US West region and the Standby US East region host Boot Volumes & Block Volumes. You set up a volume backup copy between the two regions for Volume Backups and Boot Volumes.

Each region has an Object Storage which uses policy-based replication with the OCI Object Storage in the Standby US East region.

Standby Region US East (Ashburn) region

Hosts a single VCN with IP address 192.168.0.0/16. The Standby US East region replicates the US West regions component architecture but includes restoration and replication capabilities. Each region includes an internet gateway which connects to a DNS. It includes a standby database and scheduled restoration between Volume Backups and Boot Volumes & Block Volumes.