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Application of virtual file system by utilizing ZIP compression format

A technology of virtual file system and compression format, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as multi-time, and achieve the effects of improving reading speed, reducing IO times, and being easy to use

Active Publication Date: 2011-07-20
上海网达软件股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also it takes more time to copy a large number of small files than a single large file of the same size

Method used

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  • Application of virtual file system by utilizing ZIP compression format
  • Application of virtual file system by utilizing ZIP compression format
  • Application of virtual file system by utilizing ZIP compression format

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Embodiment Construction

[0019] In order to make the content of the present invention clearer and easier to understand, the content of the present invention will be further described below in conjunction with the accompanying drawings. Of course, the present invention is not limited to this specific embodiment, and general replacements known to those skilled in the art are also covered within the protection scope of the present invention.

[0020] Secondly, the present invention is described in detail by means of schematic diagrams. When describing the examples of the present invention in detail, for the convenience of explanation, the schematic diagrams are not partially enlarged according to the general scale, which should not be used as a limitation of the present invention.

[0021] figure 1 A brief flow chart of the application of the virtual file system of the present invention's application ZIP compression format, figure 2 It is a schematic diagram of a module for the application of the virtu...

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Abstract

The invention relates to an application of a virtual file system by utilizing a ZIP compression format. A file directory is compressed and packed to generate an image file of the ZIP compression format; the virtual file system takes over file operation; in the image file, the image file is unpacked, a mapping path is matched, and the image file is selectively loaded in a memory so as to quicken the file access operation; and for the virtual file succeeding in accessing, the mapping information of the virtual file is copied to a small array type queue so as to quicken the continuous access efficiency of the same file, thereby realizing the purpose of quick access. According to the application of the virtual file system by utilizing the ZIP compression format, the IO (Input / Output) operation times can be reduced, and the reading speed is improved so as to improve the application installation speed and the page switching speed; and the ZIP compression format is used for packing without special tools or additional authorization, thus the virtual file system is convenient to use.

Description

technical field [0001] The invention relates to a processing method for reading based on a flash memory file system, in particular to an application of a virtual file system using a ZIP compression format. Background technique [0002] The common data in the mobile phone system exists on the flash drive in the form of files. When the application involves reading a large number of files, a large number of file IO operations are required. The IO operation of the file is limited by the physical characteristics of the flash memory and the flash memory controller, which determines that the reading efficiency of small files is less than 1 / 10 to 1 / 100 of the highest reading efficiency of the flash disk. For example, the commercially available 200X high-speed SD card has a reading speed of 1800K / S for 1K blocks, and the reading efficiency for file blocks larger than 32K basically reaches the maximum reading efficiency of 22000K / S. Also it takes more time to copy a large number of s...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 蔡振怀周后红李庆瑜
Owner 上海网达软件股份有限公司