Data management method and system in mixed storage structure of flash disk

A hybrid storage and data management technology, applied in the field of data management, can solve the problems of high statistical frequency cost, long time, and limitation, and achieve the effects of reducing write operations, improving performance, and saving flash memory space

Inactive Publication Date: 2012-10-03
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the storage and calculation costs of the statistical frequency are relatively high, and it takes a lon

Method used

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  • Data management method and system in mixed storage structure of flash disk
  • Data management method and system in mixed storage structure of flash disk
  • Data management method and system in mixed storage structure of flash disk

Examples

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Embodiment Construction

[0060] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0061] figure 1 It is a flowchart of a data management method in a flash disk hybrid storage structure according to an embodiment of the present invention; refer to figure 1 , the method includes the following steps:

[0062] S1: When the current page needs to be operated, determine whether the current page is in the memory, if so, directly perform the corresponding read / write operation on the current page in the memory, and end the method, otherwise execute Step S2;

[0063] S2: Determine whether the current page is in the flash memory, if so, execute step S3, otherwise execute step S5;

[0064] S3: Generate a first random number, if the first random number is less th...

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PUM

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Abstract

The invention discloses a data management method and system in a mixed storage structure of a flash disk, and relates to the technical field of data management. According to the invention, the operation of the page is controlled by probability, so that the flash storage space is saved, the write operation of flash storage is reduced and the data management performance is improved.

Description

technical field [0001] The invention relates to the technical field of data management, in particular to a data management method and system in a flash disk hybrid storage structure. Background technique [0002] Although flash memory technology has developed rapidly in recent years, compared with traditional disks, solid-state drives (SSDs) based on flash memory are still limited in capacity and high in price. At present, the capacity and price of solid-state drives are between disk and memory. Therefore, solid-state drives can be deployed between memory and disk to form a hybrid storage structure as a cache of disk data. [0003] A typical hybrid storage structure such as figure 1 As shown, all data storage and organization data pages on the hard disk. A page needs to be loaded into main memory before it can be accessed. Since flash memory has better performance compared to disk, it can act as a cache between main memory and disk, that is, when a page memory miss occurs...

Claims

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Application Information

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IPC IPC(8): G06F3/06G06F12/02
Inventor 崔斌吕雁飞李井
Owner PEKING UNIV
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