In X9M systems at the time of provisioning, each Exadata storage server has the following capacity:
- 1.5 TB of persistent memory (PMEM)
- 25.6 TB of raw PCI NVMe flash storage
- 63.6 TB of usable disk storage
Three storage servers have the following total capacity:
- 4.5 TB of PMEM
- 76.8 TB of raw PCI NVMe flash storage
- 190.8 TB of usable disk storage
When you provision a virtual machine (VM) cluster, Oracle Automatic Storage Management (ASM) provisions the storage space inside the Exadata storage servers. The usable storage capacity is the storage available for Oracle Database files after taking into account high-redundancy ASM mirroring (triple mirroring), which provides highly resilient database storage on all Exadata Database Service on Dedicated Infrastructure configurations. The usable storage capacity does not factor in the use of Exadata compression capabilities, which can increase the effective storage capacity.
Each instance of Exadata Database Service on Dedicated Infrastructure contains multiple database servers and Exadata storage servers connected through network fabric ports with active bonding. The Exadata database and storage server racks reside in an Oracle Cloud Infrastructure (OCI) region. With the Exadata X9M elastic expansion option, the starting configuration is similar to a quarter rack (two database and three storage servers).
The client and backup networks provide access to your VM clusters on the database servers. Oracle manages the infrastructure through the management network, which connects the database and storage server hardware.