1Z0-997-25 Question 34
Single answerYour organization runs a mission-critical banking application on Oracle Cloud Infrastructure (OCI). Currently, your production Oracle Database is deployed with Real Application Clusters (RAC) across two Availability Domains in one region. Leadership now requires a disaster recovery (DR) solution that enables near-zero data loss (RPO) and minimal downtime (RTO) in the event of a regional outage. Which configuration best meets these requirements?
- A
Maintain a RAC standby in the same region with manual failover procedures
- B
Implement Data Guard with synchronous replication to a separate OCI region
- C
Automatically replicate database backups daily to a second region� Object Storage
- D
Use an ad-hoc remote snapshot of the database to a different region
Show answer and explanation
Correct answer: B
Explanation
For robust disaster recovery with near-zero data loss, Oracle Data Guard configured for synchronous replication (Maximum Protection or Maximum Availability mode) across regions is a recommended approach. This method continually applies redo transactions to the standby in the remote region, ensuring minimal RPO and RTO. Refer to Oracle� documentation on Data Guard best practices at https://docs.oracle.com/en/solutions/disaster-recovery-oci/overview.html for more details on configuring cross-region disaster recovery.
- A. Incorrect.
Option 1: Maintaining a RAC standby in the same region with manual failover does not protect against a complete regional outage. While it provides high availability within the region, it does not meet the requirement for regional disaster recovery because both primary and standby are still in the same region.
- B. Correct.
Option 2: Using Data Guard with synchronous replication to a physically separate OCI region provides near-zero data loss (assuming low-latency network and the correct protection mode). This approach ensures that transactions are committed to both primary and standby, significantly reducing RPO and RTO in the event of a regional failure.
- C. Incorrect.
Option 3: Replicating database backups daily to Object Storage in another region is cost-effective but may lead to unacceptable data loss. Daily backups do not meet a near-zero RPO, as any transactions after the last backup would be lost if a regional outage occurred.
- D. Incorrect.
Option 4: Taking an ad-hoc remote snapshot does not guarantee continuous data protection or near-zero data loss. Snapshots are point-in-time and do not keep up with ongoing transactions in real-time, leaving a gap for potential data loss.