The image shows a secure, high-availability connectivity from a client application in Google Cloud to Oracle RAC database instances in OCI, connected through dedicated networking and notification services distributed across multiple fault domains for resilience. A network architecture connects a Google Cloud Region to the OCI Region.

The Google Cloud Region hosts a Client Application that connects through Oracle Interconnect for Google Cloud and OCI FastConnect to the OCI Region through a DRG.

The OCI Region hosts an Availability Domain with three Fault Domains. An ONS Proxy VCN with a Public subnet and a Private subnet.

The architecture includes an Availability Domain divided into three Fault Domains.

• Fault Domain 2 hosts a CMAN - VM1 within Public Subnet 10.0.0.0/24 containing:
  • CMAN Instance
  • Oracle Notification Server
  • Oracle Notification Server proxy
• Fault Domain 1 and Fault Domain 3 hosts two Database System Virtual Machines (VMs) within Private Subnet 10.1.0.0/24. VM1 resides in Fault Domain 1 and VM 2 in Fault Domain 3.
  • Oracle Notification Server Daemon
  • Oracle Grid Infrastructure
  • RAC DB Instance (Instance 1 in Fault Domain 1, Instance 2 in Fault Domain 3)

Lines connect the client application to the CMAN instance and both database instances, indicating network communication paths.