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Sequential access detection system and method

A technology of access unit and node, which is applied in the field of sequential access detection system, can solve the problem of low search efficiency, achieve the effects of improving search efficiency, fast cross-referencing, and reducing the number of writing times

Active Publication Date: 2017-12-29
山东宏数科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the search method of this LRU list is a sequential search, so in the worst case, it is possible to search from the head end of the LRU list to the end end, resulting in a very low search efficiency

Method used

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  • Sequential access detection system and method
  • Sequential access detection system and method
  • Sequential access detection system and method

Examples

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Embodiment Construction

[0017] Such as figure 1 Shown is a schematic diagram of the application environment of the sequential access detection system of the present invention. In this embodiment, the sequential access detection system 20 (hereinafter referred to as "system 20") operates in an electronic device 2 to detect whether the access file corresponding to the access unit to be accessed is sequential access files (i.e. continuous IO files). The electronic device 2 also includes a storage device 21 , a display device 22 , and a processor 23 connected through signal lines and data lines. It can be understood that the electronic device 2 should further include other necessary components, such as batteries. The storage device 21 further includes a storage type flash memory (NAND flash) 210 .

[0018] Before the access file is accessed, the access file is divided into multiple fragments (that is, access units), and then these access units are numbered sequentially. When accessing an access unit ...

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Abstract

The invention discloses a sequential access detection system and method. The method includes the steps: judging whether an access file corresponding to an access unit is a sequential access file or not when a stored flash memory disk NAND flash terminal receives one access unit of a certain access file; marking a sequential access label corresponding to the access file as a label of a sequential access task when the access file corresponding to the access unit is the sequential access file. The read-in frequency of a sector of the NAND flash can be decreased, and a large quantity of time and space needed by specific counting can be saved.

Description

technical field [0001] The invention relates to the technical field of data access, in particular to a sequential access detection system and method. Background technique [0002] In computer systems, disk IO management is the key to system performance. On the emerging storage type flash memory disk (NAND flash disk), due to its high-speed read and write speed, it can significantly improve the performance of the computer system, so it has begun to be valued by the database system. However, although the read and write efficiency of NAND flash for random access is much higher than that of disk, its read and write efficiency for sequential access can be equaled by the Redundant Array of Independent Disk (RAID) system with multiple hard disks. In order to save the precious limit on the number of write times of NAND flash, thereby increasing its service life and reducing the construction cost, there is currently an algorithm that can detect whether the access is continuous acces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06G06F17/30
CPCG06F3/061G06F3/0643G06F3/0679G06F12/123G06F16/2282G06F16/24552G06F16/24578
Inventor 刁奇
Owner 山东宏数科技有限公司
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