Realization method and device of mixed secondary storage system

A technology of secondary storage and implementation method, applied in the computer field, can solve the problem that the number of disk accesses cannot be effectively reduced, and achieve the effects of low power consumption, low cost and large capacity

Inactive Publication Date: 2010-07-14
北京北大众志微系统科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the frequency of reading and writing of files changes, there are frequent file transfers between Flash and

Method used

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  • Realization method and device of mixed secondary storage system
  • Realization method and device of mixed secondary storage system
  • Realization method and device of mixed secondary storage system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The implementation method of the secondary storage proposed by the present invention includes:

[0033] Flash and disk are used to form a hybrid secondary storage system to make full use of the low cost and large capacity of disk and the low power consumption of Flash.

[0034] As the file-level cache of the disk, Flash makes full use of the locality of file access, so that most file operations can be performed in Flash, and the disk is in a low power consumption state to improve the power consumption and performance of the system.

[0035] Flash replaces the disk to provide most of the file operations to the system, and only accesses the disk when the Flash file cache is invalid, so as to reduce the number of disk accesses.

[0036] As an independent non-volatile secondary storage device, Flash can be used independently.

[0037] The file-level cache described above includes:

[0038] The file-level cache caches the subset of files in the disk in units of files, whic...

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PUM

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Abstract

The invention relates to a realization method and a device of a mixed secondary storage system. The realization method comprises the following steps that: step 1: a file is stored in a disk by default; step 2: if the required file is not in a memory, a flash memory is accessed; if the required file is not in the flash memory, the disk is accessed, and the file is obtained; step 3: if the required file is stored in the disk and the access frequency reaches a preset value, and the required file is cached in the flash memory; and step 4: when the size of the file cached in the flash memory reaches a certain value, some files are selected to be written into the disk. Compared with the prior art, the invention can realize a large-capacity and low-power consumption secondary storage system with low cost.

Description

technical field [0001] The invention relates to the field of computers, in particular to a method and device for realizing a hybrid secondary storage system. Background technique [0002] With the rapid development of social economy, energy supply is difficult to meet the needs of development. While developing new energy, saving energy and protecting the environment have become important tasks for all human beings. In the field of computers leading the information age, low power consumption design has begun to attract people's attention. In battery-operated mobile devices such as notebooks, low-power design is the main way to delay battery life. [0003] In recent decades, magnetic disks have always occupied the main position of computer secondary storage devices, but the mechanical characteristics of magnetic disks cause it to have a large read and write delay, which also makes it a major consumer of battery energy. In order to improve the read and write delay of the disk...

Claims

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Application Information

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IPC IPC(8): G06F12/08G06F3/06G06F12/02
CPCY02B60/1225Y02D10/00
Inventor 程旭刘姝管雪涛
Owner 北京北大众志微系统科技有限责任公司
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