NVMe over Fabrics with SPDK with iRDMA总结 - 1

1.0     Introduction简介

NVM Express* (NVMe*) drives are high-speed, low-latency, solid-state drives (SSDs), that connect over the server Peripheral Component Interconnect Express* (PCIe*) bus. NVM Express* (NVMe*) 硬盘是高速、低延迟的固态硬盘 (SSD)，通过服务器外设组件互连 Express* (PCIe*) 总线连接。

The development of these high-performance drives has spurred new innovation in storage over networking protocols, which takes full advantage of the drive capabilities in data center and cloud environments. 这些高性能硬盘的开发推动了网络存储协议的创新，从而充分利用了硬盘在数据中心和云环境中的功能。

NVMe over Fabrics (NVMe-oF) provides networked storage at a latency level close to locally-mounted storage through a re-architected storage protocol that combines the use of low-latency/high-efficiency fabric technologies such as Remote Direct Memory Access (RDMA) or Fibre Channel (FC) with these high-speed NVMe drives. NVMe over Fabrics（NVMe-oF）通过重新架构的存储协议，将低延迟/高效率的技术（如远程直接内存访问（RDMA）或光纤通道（FC））与这些高速 NVMe 硬盘结合使用，以接近本地安装存储的延迟水平提供网络存储。

The Storage Performance Development Kit (SPDK) provides a set of tools and libraries for writing high-performance, scalable, user-mode storage applications. SPDK is an open-source project focused on optimizing storage software for the latest generation CPUs, NVMe SSDs, and NICs to improve the performance and efficiency of storage applications. It achieves high-performance by moving all of the necessary storage drivers into userspace and operating in a polled mode instead of interrupts, which avoids kernel context switches and eliminates interrupt handling overhead. 存储性能开发工具包（SPDK）为编写高性能、可扩展的用户模式存储应用提供了一套工具和库。SPDK 是一个开源项目，专注于为最新一代 CPU、NVMe SSD 和网卡优化存储软件，以提高存储应用的性能和效率。它将所有必要的存储驱动程序移至用户空间，并以轮询模式而非中断模式运行，从而避免了内核上下文切换并消除了中断处理开销，从而实现了高性能。

The SPDK community started with a userspace, polled-mode, asynchronous, lock-less NVMe driver and then extended the performance and efficiencies of SPDK to storage networking and virtualization. SPDK provides a high-performant NVMe-oF target and host components that are spec compliant. Therefore, users can use the Linux Kernel NVMe-oF host to connect to an SPDK NVMe-oF target and vice versa. SPDK 社区从用户空间、轮询模式、异步、无锁 NVMe 驱动程序起步，然后将 SPDK 的性能和效率扩展到存储网络和虚拟化。SPDK 提供了符合规范的高性能 NVMe-oF 目标机和主机组件。因此，用户可以使用 Linux 内核 NVMe-oF 主机连接 SPDK NVMe-oF 目标机，反之亦然。

Intel supports NVMe over Fabrics on two Intel® Ethernet product lines with RDMA technology: 英特尔在两个采用 RDMA 技术的英特尔®以太网产品线上支持 NVMe over Fabrics：

• Intel® Ethernet 800 Series
• Intel® Ethernet Connection X722/Intel® Ethernet Network Adapter X722.

1.1       Purpose目的

This document is a reference guide for configuring the SPDK NVMe over Fabrics target application on the Linux* operating systems using Intel® Ethernet 800 Series or Intel® Ethernet Connection X722/ Intel® Ethernet Network Adapter X722. 本文档是在 Linux* 操作系统上使用英特尔®以太网 800 系列或英特尔®以太网连接 X722/ 英特尔®以太网网络适配器 X722 配置 SPDK NVMe over Fabrics 目标应用程序的参考指南。