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Software-defined fusion storage method for solid-state disc

A software-defined, solid-state disk technology, applied in the direction of memory address/allocation/relocation, input/output to record carrier, etc., can solve the problem of not being able to fully utilize the performance advantages of PCM, NANDFLASH, etc., to facilitate rapid innovation, improve performance, improve The effect of lowercase performance

Active Publication Date: 2014-05-07
HUAZHONG UNIV OF SCI & TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in solid-state disks, many studies use PCM as the cache of NAND FLASH, but this cannot give full play to the performance advantages of PCM to make up for the performance shortcomings of NAND FLASH

Method used

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  • Software-defined fusion storage method for solid-state disc

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Embodiment Construction

[0028] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] Generally speaking, the present invention is mainly based on two points: one is to implement the fusion storage layer——HFSL (Host Fusion Storage Layer) on the host side, to realize flexible IO scheduling and management strategies and performance optimization for solid state disks, and to simplify the structure of solid state disks ; The second is to integrate PCM storage in NAND FLASH-based solid-state disks. PCM can be used as the same-level memory of NAND FLASH to store metadata information of solid-state disks, and can also be used to store lowercase data or frequently accessed hot files. Data, etc. At the same time, PCM can also be used as the upper-level cache of NAND FLASH to improve the performance of SSDs.

[0030] Further, the present invention is based on the following principles: the HFSL intermediate layer is implemented be...

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Abstract

The invention discloses a software-defined fusion storage method for a solid-state disc. An HFSL (host fusion storage layer) is added on a host, physical block characteristics of the solid-state disc and statistical information during usage are obtained directly, complex IO (input / output) scheduling and management of the solid-state disc are conducted in combination with upper-layer data access characteristics, and an address mapping method with variable allocation granularities is used for realizing persistent high performance of the solid-state disc. According to the method, performance optimization of an NAND flash and storage management fusing a PCM (phase change memory) and the NAND flash are realized on the host, and the outstanding performance of the PCM is used for making up performance defects of the NAND flash, so that the read / write performance of the solid-state disc is improved, and the service life of the solid-state disc is prolonged.

Description

technical field [0001] The invention belongs to the field of computer data storage, and in particular relates to a software-defined solid-state disk fusion storage method. Background technique [0002] In recent years, the rapid development of NAND FLASH-based solid-state disks has gradually replaced traditional mechanical hard disks. The manufacturing process of NAND FLASH chips has been continuously improved, from the 25nm process in 2008 to the current 10nm process, the performance has been continuously improved. However, NAND FLASH has limited wear times, poor lower-write performance, and does not support in-place modification, which still limits its performance. [0003] The existing NAND FLASH-based solid-state disk basically uses the firmware program in the solid-state disk to shield the shortcomings of NAND FLASH, and provides a disk-like block device interface for the host to use. The host side completely regards the SSD as a black box and uses it directly regardl...

Claims

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Application Information

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IPC IPC(8): G06F3/06G06F12/02
Inventor 刘景宁冯丹童薇张双武雷宗浩余晨晔罗锐张建权
Owner HUAZHONG UNIV OF SCI & TECH
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