Exadata Storage Server X11M Extreme Flash (EF) is the premium all-flash extreme-performance Exadata storage server offering. Each Exadata X11M EF storage server includes the following hardware components:
- Four 6.8 TB performance-optimized flash devices (primarily for Exadata Smart Flash Cache)
- Four 30.72 TB capacity-optimized flash devices (for base data storage)
- 1.5 TB of system memory (high-performance DDR5 DRAM), with 1.25 TB dedicated to Exadata RDMA Memory Cache (XRMEM cache). XRMEM cache supports data access using Remote Direct Memory Access (RDMA) to deliver high performance with extremely low latency.
Note: All specifications are for Exadata X11M storage servers. See the related resources for more details and information about other models.
Each storage server runs Oracle Exadata System Software to process data at the storage level and pass on only what is needed to the database servers.
Like HC storage servers, the 6.8 TB performance-optimized flash devices on EF storage servers primarily support Exadata Smart Flash Cache, which automatically caches frequently used data in high-performance flash memory. Likewise, Exadata Smart Flash Log uses a small portion of flash memory as temporary storage to reduce latency and increase throughput for redo log writes. However, unlike HC storage servers, the 30.72 TB capacity-optimized flash devices provide data storage with much lower latency than hard disk drives (HDDs).
Starting with Exadata System Software release 24.1, Oracle Exadata Exascale transforms Exadata storage management by decoupling Oracle Database and GI clusters from the underlying Exadata storage servers. Exascale software services manage pools of storage that span the fleet of Exadata storage servers and service multiple users and database server clusters.