Memory system, and method and system for controlling service quality of memory system

Abstract

The invention provides a memory system, and a method and a system for controlling service quality of the memory system. The method for controlling the service quality of the memory system comprises the following steps: collecting processing capability information of hard discs in the memory system, and obtaining processing capabilities of the hard discs through the processing capability information; dividing a cache into a plurality of levels according to the processing capabilities of the hard discs, wherein the cache in each level corresponds to one or more hard discs in the memory system, and the page quota of the cache in each level is pre-allocated according to the processing capability information of one or more hard discs corresponding to the cache in each level; and for the cache of a level in which dirty data reach a preset proportion, writing data in the cache of the level into the hard discs corresponding to the cache of the level. The system for controlling the service quality of the memory system comprises a collecting module, a first dividing module and a disc-writing module; and the memory system comprises a host, a cache and the system for controlling the service quality of the memory system. The preemption of page resources in the cache is avoided.

Description

technical field [0001] The present invention relates to the field of computer technology, in particular to a storage system service quality control method, system and storage system. Background technique [0002] Cache (cache) is a component introduced by the storage system to improve performance. It is mainly used to improve the input / output (Input / Output; hereinafter referred to as: I / O) performance of the entire system, and stores some temporary data in the memory to speed up The host's I / O response. For the read operation of the host, the system temporarily puts the read data into the cache, and the read operation of the host directly hits the cache, thereby saving the operation of the host to read the disk; for the write operation of the host, the system directly stores the write data of the host Cached in the cache, thus saving disk write operations. In order to make the read and write operations go as smoothly as possible, the cache will read the data that the host ...

AI Technical Summary

Problems solved by technology

However, page resource preemption still occurs inside each cache partition in the prior art, resulting in the performance of the business corresponding to this cache partition (such as transmission delay, packet loss rate, etc.) being dragged down by the slowest disk at the back end. Thereby reducing the quality of service of the storage system

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