Description of the illustration architecture-disaster-recovery.png

The illustration depicts a typical multiple-region, multiple-domain Oracle Cloud Infrastructure deployment, with two Regions each containing one Oracle Cloud Infrastructure instance consisting of two data Availability Domains.

On the left of the image is a large box labeled Oracle Cloud Infrastructure (Primary Region). On the right is a similar but smaller box labeled Oracle Cloud Infrastructure (Secondary Region).

Within each region is a dotted-line box, labeled Virtual Cloud Network. At the top of each VCN is a cloud icon labeled Internet Gateway.

Within each of the two VCNs are two large blue boxes, labeled Availability Domain 2 and Availability Domain 1. In the Primary region, Availability Domain 2 is on the left, while in the Secondary Region, Availability Domain 2 is on the right. Three solid lines, each labeled Security List, cut across the diagram within the VCNs, and extend out to the side of the diagram, beyond the border of the Oracle Cloud Infrastructure regions. The first Security List line separates the Internet Gateways from the Availability Domains.

Within the four Availability Domains are three boxes representing subnets. In the Primary Region, between the first and the second Security List lines, is Public Subnet A. Parallel to Subnet A, in the Secondary Region, is Subnet D. In the Primary Region, between the second and the third Security List Lines, is Private Subnet B. Parallel to Subnet B, in the Secondary Region, is Subnet E. Below the last Security List line, in the Primary Region, each Availability Domain has its own subnet: the Availability Domain 2 on the left has Private Subnet C, while Availability Domain 1 has another Private Subnet C. Parallel to the two Subnet Cs, in the Secondary Region, a Subnet F spans both Availability Domains.

Within the Public Subnet A are three components: a Bastion Host component inside the Availability Domain 2, containing an icon representing Fault Domain (FD) 1; a Load Balancer component inside the Availability Domain 2; and a Web Servers component spanning both Availability Domains, containing two icons in Availability Domain 2 labeled Fault Domain 2 and Fault Domain 3, and two icons in Availability Domain 2 labeled Fault Domain 1 and Fault Domain 2. Additionally, Availability Domain 1 contains a greyed-out Load Balancer component. The Load Balancer in Availability Domain 2 is connected to the Web Servers component by a double-ended arrow, while the greyed-out Load Balancer in Availability Domain 1 is not connected.

In the Secondary Region, inside Subnet D, each of the Availability Domains contains a Load Balancer and a Fault Domain web server (both labeled Fault Domain 1). The Load Balancer in Availability Domain 1 is blue, indicating it is active, while the Load Balancer in Availability Domain 2 is greyed out, indicating it is in passive mode.

A double arrow labeled "rsync" connects the Web Servers in the Primary Region to the Subnet D in the Secondary Region.

In the Primary Region, within Private Subnet B are two components: an Admin Server component within Availability Domain 2, containing an icon labeled Fault Domain 1; and a WebLogic Servers - Cluster 1 (Managed Servers) component spanning both Availability Domains, containingan icon labeled Fault Domain 2 inside the Availability Domain 2, and two more icons labeled Fault Domain 1 and Fault Domain 2 inside Availability Domain 1. A three-pointed arrow connects across the Security List line from the Web Servers in Pubilc Subnet A, to the Admin Server and WebLogic Servers - Cluster 1 of Private Subnet B.

Parallel to Private Subnet B, in the Secondary Region, Subnet E contains one Fault Domain 1 icon in each Availability Domain. Each of these is connected by an arrow, across the Security List line, to the Fault Domain 1 icons in the Subnet D component above.

Below the last Security List line, within each of the Private Subnet C components, each of the two Availability Domains has is a single database icon. Availability Domain 2's icon is labeled Active Database, while Availability Domain 1's icon is greyed out, and labeled Standby Database. An arrow labeled Synchronous Active Data Guard connects from the Active Database to the Standby Database.

Parallel to the Private Subnet C components, in the Secondary Region, Subnet F contains a single Active Database icon in Availability Domain 1. An arrow labeled Cross Region Data Guard (DR) connects from the Active Database in Private Subnet C of the Primary Region, to the database in Subnet F of the Secondary Region.