Block storage cache system and method based on NVMe SSD

Abstract

The invention relates to a block storage cache system and method based on an NVMe SSD, the system comprises a cache pool and a block storage, the cache pool comprises a control module, a cache pool distribution module, an SSD block management module, an elimination module, a read-write module and an NVMe SSD cache module, and the NVMe SSD cache module comprises a plurality of SSD blocks with the same capacity. a bottom-layer physical space of the block storage is composed of a mechanical hard disk, a plurality of block storage data blocks in the block storage are logically integrated into a corresponding LUN, the LUN corresponds to respective SSD block management modules and respective SSD block sets, and the cache pool distribution module is used for distributing SSD blocks to the LUN; the SSD block management module is used for executing an operation of applying for an SSD block by the LUN and scheduling an SSD block set corresponding to the LUN; and the elimination module is used for eliminating, screening and recycling SSD blocks with read-write heat lower than a preset threshold value in the SSD block set corresponding to the LUN to the NVMe SSD cache module. Compared with theprior art, the read-write performance of block storage can be effectively improved on the basis of ensuring low cost and large capacity.

Description

technical field [0001] The present invention relates to the technical field of block storage caching, in particular to an NVMe SSD-based block storage caching system and a method thereof. Background technique [0002] With the rapid development of computer technology, most enterprises now use computers to operate their core business, resulting in explosive growth of business data. In order to ensure the traceability of business data, many enterprises currently use storage systems to store their business data, and block storage is a very widely used storage method. [0003] Due to its large capacity and low price, HDD mechanical hard disk has always been the most common data storage medium. Many blocks of storage use mechanical hard disk as its data storage medium. However, due to the limitation of the mechanical hard disk, it can no longer meet the needs of the business for read and write performance. The existing technology uses an all-flash storage system instead of a me...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the mechanical hard disk, it can no longer meet the needs of the business for read and write performance.

The existing technology uses an all-flash storage system to replace the mechanical hard disk to improve read and write performance, but the cost of the all-flash system is relatively high and the capacity is limited

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