This image shows a Apache Spark cluster that consists of a manager node and three worker nodes deployed in a single availability domain in an Oracle Cloud region. The worker nodes are distributed across the three fault domains in the availability domain.

The cluster uses a single VCN 10.0.0.0/16. The manager node is attached to a public subnet 10.0.1.0/24, and the worker nodes are attached to a private subnet 10.0.3.0/24. An internet gateway and a NAT gateway are provisioned for the VCN. The worker nodes use block volumes for data persistence.