Oracle Cloud Infrastructure 2022 Architect Professional — Question 43

You have been asked to deploy a mission critical workload into production on Oracle Cloud Infrastructure (OCI). The application is write-intensive and performs lots of disk IO. For this reason, you have decided to deploy it on a DenseIO VM shape with local NVMe drives. As the application is mission critical, you must both protect against NVMe device failure and maximise write performance.

How should you achieve this?

Answer options

• A. Configure RAID 1 for the NVMe devices.
• B. Use rsync to copy all the data to a new identical VM instance if an NVMe drive fails on the original VM instance.
• C. Mirror the NVMe devices to OCI object Storage using a Storage Gateway.
• D. Configure RAID 10 for the NVMe devices.

Correct answer: D

Explanation

The correct answer is D, as RAID 10 combines the benefits of both striping and mirroring, providing high write performance and redundancy, which is essential for mission-critical applications. Option A, RAID 1, offers redundancy but does not maximize performance compared to RAID 10. Option B relies on a manual process to restore data, which is not efficient for high availability needs. Option C does not provide the necessary performance and redundancy on the NVMe level required for write-intensive workloads.