This image shows an Oracle Cloud region with a single availability domain with three fault domains, a VCN, and three block storage instances to store journal or log files.

Ops Manager resides in fault domain 2 in the public subnet (10.0.1.0/24). Two-way communication occurs between the Ops Manager and the Internet Gateway.

A MongoDB node resides in each fault domain in a private subnet (10.0.2.0/24). Each MongoDB node is connected to each of the Block Storage instances.