This image shows an Oracle Cloud Infrastructure tenancy enclosing a region with object storage for the region. The region includes a single availability domain with three fault domains.

A compartment encloses a virtual cloud network (VCN). Compartments cross all regions in a tenancy. The tenancy provides Cloud Guard protection across the tenancy on a compartment level.

The VCN provides three private regional subnets, a service gateway, and a dynamic routing gateway for private connections from the customer's data center through IPSec VPN or FastConnect. The VCN provides routing tables for each subnet and each subnet provides its own security list access. The regional subnets are arranged as functional layers:

• Head node layer (regional private subnet): The head node resides in fault domain 2 and connects to the on-premises data center through the dynamic routing gateway. The head node layer connects to the HPC cluster layer to provision HPC clusters and to deprovision clusters on job completion.

• HPC cluster layer (regional private subnet): Remote direct memory access (RDMA) compute nodes are distributed across the three fault domains in a high-performance computing (HPC) cluster.

• File storage layer (regional private subnet): File storage is provided outside of the fault domains and is accessible from both the head node and HPC cluster nodes.