NVMe over Fabrics (NVMe-oF) is a technology specification designed to enable nonvolatile memory express message-based commands to transfer data between a host computer and a target solid-state storage device or system over a network, such as Ethernet, Fibre Channel (FC) or InfiniBand. NVM Express Inc., a nonprofit organization comprising more than 100 member technology companies, published version 1.0 of the NVMe-oF specification on June 5, 2016. A workgroup within the same organization released version 1.0 of the NVMe specification on March 1, 2011. NVMe version 1.3, released in May 2017, added features to enhance security, resource sharing and solid-state drive (SSD) endurance. Vendors are working to develop a mature enterprise ecosystem to support end-to-end NVMe-over Fabrics, including the server operating system (OS), server hypervisor, network adapter cards, storage OS and storage drives. The NVM Express organization estimates that 90% of the NVMe-oF protocol is the same as the NVMe protocol, which is designed for local use over a computer's Peripheral Component Interconnect Express (PCIe) bus. Storage area network (SAN) switch vendors -- including Brocade Communications Systems (now part of Broadcom Ltd.), Cavium Inc. (which acquired QLogic Corp. in 2016), Cisco Systems Inc. and Mellanox Technologies -- are trying to position 32 Gbps FC as the logical fabric for NVMe flash. Read more... |
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