1Z0-997-25 Question 46
Single answerYour organization is migrating a revenue-critical e-commerce platform to Oracle Cloud Infrastructure (OCI). The solution must remain operational even if the primary region experiences a complete outage, with minimal data loss and near real-time replication. The current architecture consists of a load-balanced web front end, a custom application layer, and an Oracle Autonomous Database back end. Which design approach best meets these business and technical requirements?
- A
Deploy the application stack within a single OCI region using multiple fault domains to ensure high availability.
- B
Configure an active-passive setup in the same region, using block volume cross-availability domain replication for the database tier.
- C
Establish a cross-region deployment with Data Guard replicating the Oracle Autonomous Database to a standby in another OCI region.
- D
Rely on object storage backups in the primary region and restore them in a different region only when needed.
Show answer and explanation
Correct answer: C
Explanation
Cross-region high availability (HA) and disaster recovery (DR) are critical for revenue-critical workloads. Oracle recommends deploying a multi-region architecture with synchronous or near synchronous replication to meet stringent recovery time objectives (RTO) and recovery point objectives (RPO). When using Oracle Autonomous Database, Oracle Data Guard can replicate data between regions, offering automated failover capabilities with minimal downtime and data loss. Refer to Oracle� HA and DR documentation for additional configuration details.
- A. Incorrect.
Option 1 is incorrect. While using multiple fault domains within a single region provides availability against localized hardware failures, it does not protect against a full regional outage.
- B. Incorrect.
Option 2 is incorrect. Cross-availability domain replication in the same region helps mitigate data center failures, but it does not address an entire region failing or being inaccessible.
- C. Correct.
Option 3 is correct. Data Guard for an Oracle Autonomous Database enables near real-time replication and failover across OCI regions. This design meets both the business requirement of high availability and the technical requirement of minimal data loss even if the primary region is lost.
- D. Incorrect.
Option 4 is incorrect. Relying solely on object storage backups entails longer recovery times and greater potential data loss, since restoration would happen after an outage occurs and is not continuously replicated.