HGST And Mellanox Show Off SAN Fabric Backed By Phase Change Memory
 

It seems that NAND flash memory just isn't fast enough to show off the full performance of the latest datacenter networking equipment from Mellanox. They teamed up with HGST at Flash Memory Summit to demonstrate a Storage Area Network (SAN) setup that used Phase Change Memory to attain speeds that are well out of reach of any flash-based storage system.

Last year at FMS, HGST showed a PCIe card with 2GB of Micron's Phase Change Memory (PCM). That drive used a custom protocol to achieve lower latency than possible with NVMe: it could complete a 512-byte read in about 1-1.5µs, and delivered about 3M IOPS for queued reads. HGST hasn't said how the PCM device in this year's demo differs, if at all. Instead, they're exploring what kind of performance is possible when accessing the storage remotely. Their demo has latency of less than 2µs for 512-byte reads and throughput of 3.5GB/s using Remote Direct Memory Access (RDMA) over Mellanox InfiniBand equipment. By comparison, NAND flash reads take tens of microseconds without counting any protocol overhead.

http://www.anandtech.com/show/9529/h...-change-memory