This reference architecture diagram shows a sharded database deployed across two availability domains in an Oracle Cloud region. The resources in each layer of the deployment are distributed across the fault domains within each availability domain.

The compute and database resources in this architecture are attached to a single regional public subnet. An internet gateway allows traffic between the VCN and the public internet. A security list to control traffic to and from the shard directors. A route table directs traffic from the subnet to the internet gateway.