Method and system for managing data mapping in SSD Cache

A technology of data mapping and management method, applied in the field of storage, can solve the problems of reducing system access efficiency, loss of memory data, long mapping relationship, etc., and achieve the effect of improving access efficiency

Active Publication Date: 2018-03-30
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in the case of system restart or power failure, the data in the memory will be lost, and the system needs to re-establish the mapping relationship between the data in the HDD and the data cached in the SSD Cache, but it takes a long time to establish the mapping relationship, thereby reducing the System Access Efficiency

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  • Method and system for managing data mapping in SSD Cache

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Embodiment Construction

[0033] The core of the present invention is to provide a management method and system for data mapping in SSD Cache, which can restore the label mapping relationship saved in SSD Cache to the memory after the system starts, without the need for the system to re-establish the data in HDD and cache in SSD Cache The mapping relationship of the data, thus improving the access efficiency of the system.

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts ...

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Abstract

The invention discloses a method and system for managing data mapping in an SSD Cache. The method comprises the steps of dividing the storage space in a hard disk drive (HDD) and the storage space inthe solid state disk (SSD) Cache into N HDD modules and M SSD modules in advance correspondingly, and conducting sequential labeling separately, wherein N is smaller than M; caching data in the N HDDmodules to the SSD modules with no cached data in the M SSD modules one by one, and establishing a label mapping relationship between the HDD modules and the SSD modules; storing the label mapping relationship to the SSD Cache so that the label mapping relationship stored in the SSD Cache is restored to a memory conveniently after the system is started. Under the condition that the system is restarted or powered off, the data in the SSD Cache cannot get lost; thus, by means of the method, after the system is started, the stored label mapping relationship is restored to the memory, and therefore the access efficiency of the system is improved.

Description

technical field [0001] The present invention relates to the field of storage technology, in particular to a method and system for managing data mapping in SSD Cache. Background technique [0002] In the storage system, the storage includes SSD (Solid State Drives, solid state disk) and HDD (Hard DiskDrive, hard disk drive) based on flash memory. Because the read speed of SSD based on flash memory, that is, SSD Cache is much faster than that of HDD, the data in HDD is usually cached to SSD Cache so that the data can be read through SSD Cache, thus establishing the relationship between data in HDD and Mapping relationship of data cached in SSD Cache. In the prior art, in order to improve the access efficiency of the system, the established mapping relationship is usually saved in memory. However, in the case of system restart or power failure, the data in the memory will be lost, and the system needs to re-establish the mapping relationship between the data in the HDD and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14G06F3/06
CPCG06F3/0644G06F11/1438
Inventor 王永刚
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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