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?
To achieve both protection against NVMe device failure and maximize write performance for a write-intensive application, configuring RAID 10 for the NVMe devices is the best solution. RAID 10, also known as RAID 1+0, combines the advantages of both RAID 1 (mirroring) and RAID 0 (striping). This configuration provides data redundancy by mirroring the data across multiple disks, ensuring data integrity in case of a drive failure, while also improving overall write performance by striping the data across multiple disks. Therefore, it balances both fault tolerance and performance, making it ideal for mission-critical workloads that require high write throughput and resilience.
D. Configure RAID 10 for the NVMe devices. RAID 10 (also known as RAID 1+0) provides both data redundancy and improved write performance. It combines disk mirroring (RAID 1) with striping (RAID 0). This configuration helps protect your data from NVMe device failures as data is mirrored across multiple drives while also improving write performance by striping data across the mirrored pairs. This option offers a good balance between data protection and performance for mission-critical workloads. Options A (RAID 1) and C (mirroring to OCI Object Storage) offer data redundancy but do not provide the same level of write performance improvement that RAID 10 offers.