Tile-recording disk-aware storage caching method and system

A technology of watt recording and caching, which is applied in the field of storage and caching of cached hybrid storage systems, can solve problems such as the impact of the life of solid state disks, and achieve the effect of reducing the amount of writing

Active Publication Date: 2022-01-07
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Tile-recording disk-aware storage caching method and system
  • Tile-recording disk-aware storage caching method and system
  • Tile-recording disk-aware storage caching method and system

Examples

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Embodiment Construction

[0035] The following will take a layered hybrid storage system constructed of solid state disks and tile recording disks as an example to further describe the tile recording disk-aware storage caching method and system of the present invention in detail.

[0036] Such as Figure 4 As shown, the implementation steps of the tile record disk-aware storage cache method in this embodiment include:

[0037] 1) In the cache hybrid storage system, the data block cache R-Cache used to store the data blocks admitted to the solid-state disk is set in advance, and the identification of the block identifier used to record the block identifier to be decided to be cached in the solid-state disk Cache G-Cache;

[0038] 2) Receive an access request for the cache hybrid storage system, if the access request is a read request, then jump to step 3); if the access request is a write request, then jump to step 4);

[0039] 3) Divide the read request into fixed-size read block requests. For each r...

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PUM

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Abstract

The invention discloses a storage cache method and system of tile record disk perception. The implementation steps include setting up data block cache and identification cache in advance; receiving an access request and dividing it into read block requests; , returns the read data from the SSD, otherwise reads the data from the HA‑SMR area; directly writes the sequential write request to the HA‑SMR area; splits the non-sequential write request into a write block request and checks whether it hits, A hit is written to the SSD. If there is a miss, the write position is determined according to the state of the target HA-SMR area. If it is in the sequential area state, it is written to the solid state disk, otherwise it is written to the tile recording disk and its identifier is cached. The present invention utilizes the host perception characteristic of the HA-SMR disk to accurately identify sequential write requests and harmless non-sequential write requests to the tile recording disk in the cache access stage, and directly writes these requests to the tile recording disk, thereby reducing the impact on the solid state disk. write volume.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06
CPCG06F3/061G06F3/0656G06F3/068
Inventor 魏登萍谢徐超黎铁军李琼宋振龙肖立权袁远邢建英孙言强宋伟夏超
Owner NAT UNIV OF DEFENSE TECH
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