A storage caching method and system perceived by a tile recording disk

Abstract

The invention discloses a storage caching method and a storage caching system perceived by a tile recording disk. The method comprises the following implementation steps of: presetting a data block cache and an identification cache; receiving an access request and segmenting the access request into read block requests, if the read block requests hit in the data block cache, returning and reading data from the solid-state disk, otherwise, reading data from the HA-SMR area; directly writing sequential write requests into HA-SMR region; and segmenting the non-sequential write requests into writeblock requests and detecting whether the write block requests hit, and writing the write block requests into the solid-state disk if the write block requests hit. If missed, a write-in position is decided according to the state of the target HA-SMR area, the SMR area is written in the solid-state disk if the HA-SMR area is in a sequential area state, otherwise, the HA-SMR area is written in the tile recording disk and caches the identifier. The host perception characteristic of the HA-SMR disk accurately identifies sequential write requests and harmless non-sequential write requests of the tile recording disk in the cache admission stage, and the requests are directly written into the tile recording disk, so that the write amount of the solid-state disk is reduced.

Description

technical field [0001] The invention relates to a hybrid storage technology, in particular to a storage and caching method for a caching hybrid storage system composed of a solid-state disk and a tile recording disk. Background technique [0002] In the caching hybrid storage system design based on solid-state disk and tile recording disk, storage caching technology uses solid-state disk as a large-capacity non-volatile storage cache between main memory and disk to build a cost-effective caching hybrid storage system . The storage cache technology manages the data in the solid-state disk with the block as the basic unit, mainly including the cache access algorithm and the cache replacement algorithm. The storage cache technology records whether the blocks in the disk are cached in the solid-state disk through the cache mapping table. The cache admission policy is responsible for monitoring the I / O requests directed to the disk, and selectively admitting some data blocks in...

AI Technical Summary

Problems solved by technology

However, having non-sequential write requests taken over by the SSD for the recording disk can have a serious impact on the lifespan of the SSD

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