The High I/O or Dense I/O configuration consists of a single Oracle 11g or 12c database instance on 2 OCPUs, with the ability to dynamically scale up to 36 OCPUs without downtime. Select one of four editions of Oracle Database Cloud Service – Standard, Enterprise Edition, Enterprise Edition High Performance, and Enterprise Edition Extreme Performance. The storage configuration for these shapes are: Bare Metal High I/O (12.8 TB NVMe SSD raw, ~3.5 TB with 2-way mirroring, ~2.3 TB with 3-way mirroring) and Bare Metal Dense I/O (28.8 TB NVMe SSD raw, ~9.4 TB with 2-way mirroring, ~5.4 TB with 3-way mirroring).
The 2-node RAC configuration consists of two Oracle 11g or 12c Enterprise Edition Extreme Performance database instances with local shared SSD Storage on 4 OCPUs (2 OCPUs per server). 2-node RAC scales dynamically up to 72 OCPUs without downtime. The storage configuration for 2-node RAC instance is 24 TB SSD raw, ~8.6 TB with 2-way mirroring, ~5.2 TB with 3-way mirroring.