The two Enclosure Fabric Modules in each VAST EnclosureA highly-available NVMe over Fabrics JBOF (Just a Bunch of Flash) making the Optane and QLC Flash SSDs the enclosure contains available to all the VAST Servers in a cluster. More connect the Optane3D Xpoint is a new non-volatile memory technology that has much lower latency and much higher endurance than NAND Flash. Optane is Intel’s trade-name for SSDs using 3D Xpoint as their storage media. VAST Universal Storage Systems use Optane SSDs to store system and element store metadata as well a... More and QLCQLC flash stores four bits in each flash cell as 16 different charge, or voltage, levels. Compared to less dense flash technology like MLC (2 bits/cell) and TLC (3 bits/cell) QLC flash has lower cost/bit and lower endurance. More SSDs in the enclosure to the NVMeNVMe is a new protocol designed specifically to provide systems access to non-volatile memory devices like SSDs. NVMe has much lower overhead, and allows much more parallel I/O than the older SCSI protocol. More Fabric.
Each Fabric Module provides multiple fabric connections (100Gbps Ethernet or Infiniband) and a PCIe switch complex that connects the fabric to all the SSDs in the enclosure.
In the event of Fabric Module failure, the SSDs remain connected to the fabric via the surviving Fabric Module.