A back-end storage method, device and system based on spdk

Abstract

An embodiment of the invention discloses a backend storage method, device and system based on an SPDK (storage performance development kit). The method includes the steps: receiving reading and writing instructions transmitted by a client; calling user states in the SPDK to drive and access NVMe (non-volatile memory express) disks according to the reading and writing instructions, and performing corresponding reading and writing operation on the NVMe disks. According to the method, the user states in the SPDK can be called after the reading and writing instructions transmitted by the client is received, the NVMe disks are driven and directly accessed, and the corresponding reading and writing operation is performed on the NVMe disks. According to the method, the NVMe disks are accessed by the aid of the user states, local file systems cannot be accessed in the access process, IO (input output) paths are decreased, delay time is shortened, performance and efficiency of software stacks in a storage system are improved, and the requirements of high-performance scenes are greatly improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of information storage, and in particular, to a method, device and system. Background technique [0002] With the development of science and technology, all-flash storage has become the development trend of future storage. The introduction of solid-state storage media makes the throughput and delay performance of storage better than traditional media, and the proportion of time taken by software in the entire transaction processing time is greatly increased. At present, there are many NVMe SSD disks (NVMe disks for short) appearing on the market. Among them, NVMe is a protocol similar to AHCI built on the M.2 interface. It is a protocol specially designed for flash memory storage. Its purpose is to Unify the SSD interface interaction standards of mainstream manufacturers, and better release the efficiency potential of the upper system. [0003] In the prior art, the NVMe disk is a...

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Problems solved by technology

[0003] In the prior art, the NVMe disk is accessed in the kernel mode when performing data read and write operations. When accessing the NVMe disk in this way, the local file system and the driver are required to finally access the NVMe disk. The IO path is long and the delay time is long. When the time is high, it is difficult to improve the performance and efficiency of the software stack in the storage system, especially to meet the needs of high-performance scenarios

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