1Z0-997-25 Question 47
Single answerA global e-commerce company is designing a new platform on Oracle Cloud Infrastructure (OCI). They require minimal downtime if an entire region becomes unavailable, and internal policies mandate storing and processing customer data across multiple geographic locations. Which design approach best meets these business and technical requirements?
- A
Deploy the application in a single region spanning multiple Availability Domains, relying on local data replication.
- B
Launch the application in at least two OCI regions, implement cross-region data replication, and use DNS-based traffic steering to dynamically route requests to the nearest operational region.
- C
Distribute the application across multiple Availability Domains and use regional backups, restoring operations only when the primary region fails.
- D
Use a single region for primary operations and replicate data asynchronously to an on-premises data center for disaster recovery.
Show answer and explanation
Correct answer: B
Explanation
When high availability across multiple regions is a key requirement, implementing an active-active or active-passive design in two or more OCI regions typically provides the best resilience. By replicating data across regions and using a DNS-based traffic management strategy, an application can automatically fail over to the secondary region within seconds or minutes. For additional details, refer to Oracle Cloud Infrastructure documentation on multi-region deployments and disaster recovery planning.
- A. Incorrect.
Option 1: Incorrect. While deploying in multiple Availability Domains within a single region does offer resilience for localized failures (e.g., AD-level outages), it does not protect against a full region outage.
- B. Correct.
Option 2: Correct. By deploying in multiple OCI regions with cross-region replication and leveraging DNS-based traffic steering, you can fail over to a secondary region with minimal downtime. This aligns well with minimal RTO/RPO requirements and meets the multi-region compliance mandate.
- C. Incorrect.
Option 3: Incorrect. Relying solely on backups and restoring operations in a secondary environment introduces a longer recovery time compared to an active-active or active-passive multi-region strategy. This may not satisfy the requirement for minimal downtime.
- D. Incorrect.
Option 4: Incorrect. Replicating data to an on-premises location covers certain disaster recovery scenarios, but it does not fulfill the requirement for multi-region coverage on OCI. Additionally, on-premises DR may result in higher latency and complexity.