Storage control method, storage control device and solid-state storage system

Abstract

The invention provides a storage control method, a storage control device and a solid-state storage system. The storage control method comprises the following steps: storing data input into the solid-state storage system in a cache memory of a first controller by the first controller of the solid-state storage system; and storing the mirror image data of the data in the cache memory of at least one solid-state hard disk in a plurality of solid-state hard disks of the solid-state storage system by the first controller, wherein each solid-state hard disk in the at least one solid-state hard disk is divided into a cache memory and a nonvolatile storage medium. Through the embodiment of the invention, the mirror image data of the data can be stored in the cache memory of at least one solid-state hard disk in a plurality of solid-state hard disks of the solid-state storage system, but the data is not mirror-imaged to the cache memory of a second controller through a mirror image, so that the I / O (Input / Output) time delay of the solid-state storage system is reduced.

Description

technical field [0001] The present invention relates to the technical field of storage, in particular to a storage control method, a storage control device and a solid-state storage system. Background technique [0002] Solid state drives use semiconductor memories (eg, Flash or DRAM) as storage media. With the development of solid state disk (Solid State Disk, SSD), solid state storage system has also been developed at a high speed, breaking the performance bottleneck of traditional mechanical storage, reducing energy consumption, and providing higher reliability. For example, Redundant Arrays of Inexpensive Disks (RAID) with solid-state drives as the basic storage unit has been well developed and applied due to its advantages of high data transmission bandwidth, high reliability and data redundancy protection. [0003] The core competitiveness of solid-state storage systems lies in high performance and low latency. Therefore, how to reduce input / output (INPUT / OUPUT, I / O) ...

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Problems solved by technology

[0004] However, mirroring data to the memory of the second controller through the mirror channel will introduce a delay of hundreds of microseconds, and for most solid-state storage systems, the I / O delay is required to be controlled at the level of 100 microseconds, Therefore, the above technical solutions cannot meet the storage system's requirements for low latency

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