What is the recommended deployment for a DR solution when resources are required to be at least 300 miles from the home OCI region?

The recommended deployment for a disaster recovery (DR) solution that requires resources to be at least 300 miles from the home Oracle Cloud Infrastructure (OCI) region is to deploy production and DR applications in two separate Virtual Cloud Networks (VCNs) in different regions.

This approach ensures that the DR environment is geographically distinct from the production environment, which is crucial for effective disaster recovery. A separation of at least 300 miles helps to mitigate risks associated with regional outages caused by natural disasters, systemic failures, or various other unforeseen events. By placing resources in different regions, you enhance the resilience of your applications and ensure that they remain available even if one region experiences issues.

While options involving deploying to different Availability Domains (ADs) within the same region can provide some level of redundancy, they do not fulfill the requirement for a significant geographic separation, as ADs are typically located within the same physical location. As a result, they do not adequately ensure protection against regional disasters.

Deploying in separate VCNs in different regions facilitates better network isolation and management while also allowing for tailored configurations that suit the specific needs of the production and DR environments. The use of separate VCNs for each region provides flexibility in terms of networking, policies, and security configurations