1Z0-997-25 Question 39
Select 2You are designing a mission-critical e-commerce application currently deployed in a single region (Phoenix), leveraging multiple Availability Domains for high availability. However, your organization also requires a robust disaster recovery (DR) strategy that ensures continued operation if the entire Phoenix region fails. Which TWO design solutions would best address this requirement, minimizing downtime and data loss?
- A
Use Oracle Data Guard in Maximum Availability mode to replicate the database asynchronously to another region.
- B
Deploy additional Compute instances in the same region but a different Availability Domain to act as a DR site.
- C
Leverage Oracle Cloud Infrastructure Traffic Management (DNS Steering Policies) to redirect traffic to a standby environment in another region upon a regional outage.
- D
Enable local block volume backups within the Phoenix region to quickly restore the database after a regional outage.
Show answer and explanation
Correct answers: A, C
Explanation
For robust disaster recovery, Oracle Cloud Infrastructure recommends deploying standby environments, typically using Oracle Data Guard, in a different region. This approach ensures near real-time synchronization of data and low RPO. Pairing that with DNS Traffic Management (steering policies) enables automated failover if the primary region fails. Refer to Oracle Cloud Infrastructure documentation on Data Guard and Traffic Management for official best practices on minimizing downtime and data loss in multi-region architectures.
- A. Correct.
Correct. Oracle Data Guard with Maximum Availability mode replicates changes nearly in real time to a standby database in another region. This offers minimal data loss (low RPO) and quick failover (low RTO). In the event of a regional outage, the standby can be promoted to primary with minimal downtime.
- B. Incorrect.
Incorrect. Deploying additional resources in a different Availability Domain within the same region will not protect against a full region failure. This setup is suitable for local high availability but does not address regional DR.
- C. Correct.
Correct. DNS Steering Policies (Traffic Management) can automatically fail over end-user requests to a standby environment in another region. This, combined with Data Guard replication, ensures continuity if the primary region goes offline.
- D. Incorrect.
Incorrect. While local block volume backups are valuable for local recovery, they do not protect against a complete regional outage. Restoring from local backups in the same region is not adequate to meet DR requirements in case of a regional failure.