Solid state drive and data access method applied to solid state drive

A solid-state hard drive and data access technology, applied in the computer field, can solve problems such as low storage performance of solid-state hard drives, short service life of solid-state hard drives, and write amplification of solid-state hard drives, so as to reduce write amplification problems, reduce rewriting times, and reduce writes. The effect of the operation

Inactive Publication Date: 2016-12-14
SHENZHEN DAPU MICROELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] For applications with active data pages such as online transactions, big data applications, and enterprise systems, the SSDs used still have the problem of write amplification, that is, the storage performance of SSDs is low, and SSDs The problem of too short service life

Method used

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  • Solid state drive and data access method applied to solid state drive
  • Solid state drive and data access method applied to solid state drive
  • Solid state drive and data access method applied to solid state drive

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Embodiment Construction

[0048] In order to enable those skilled in the art to better understand the solutions of the present invention, 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 are only 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 belong to the protection scope of the present invention.

[0049] After research, the inventor found that in the prior art, the scenarios with serious write amplification problems are generally online transactions, big data applications, and enterprise systems. Frequent rewriting is required, so that the number of reads and writes to the flash memory is too many, and then the problem of write amplificati...

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Abstract

The invention discloses a solid state drive and a data access method applied to the solid state drive. The data access method includes caching acquired to-be-written data in a preset write cache module; sorting the to-be-written data in the write cache module according to least recently used (LRU) page algorithms; determining preset quantities of replacement data among the not commonly used to-be-written data according to preset cache replacement algorithms when data memory spaces in the write cache module reach preset values; writing the replacement data in a flash memory of the solid state drive. The solid state drive and the data access method in an embodiment of the invention have the advantages that the rewriting frequencies of the flash memory in the solid state drive can be effectively reduced, and the problem of writing amplification of an existing solid state drive in data access procedures can be effectively solved.

Description

technical field [0001] The invention relates to the field of computers, in particular to a solid-state hard disk and a data access method applied to the solid-state hard disk. Background technique [0002] Solid State Drives (SSD, Solid State Drives) are hard disks made of solid-state electronic memory chip arrays. Solid State Drives include a control unit and a storage unit (usually a FLASH memory chip). [0003] The storage unit widely used in solid-state hard drives is generally NAND flash memory, which cannot directly perform overwriting operations on the location where the original data is stored; the specific reasons are, first of all, the NAND flash memory The byte can only change from 1 to 0, and vice versa; in addition, for the write operation of the solid state disk, its smallest operation unit is the page; based on the above two characteristics, all write operations need to be performed in one All bytes are all 1 on the new page, so by changing the byte that need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/061G06F3/0616G06F3/0656G06F3/0679G06F12/123G06F2212/7203G06F2212/7205G06F12/0246G06F3/06G06F3/0622G06F12/0868G06F12/0871G06F2212/2022G06F2212/604
Inventor 何海波杨庆
Owner SHENZHEN DAPU MICROELECTRONICS CO LTD
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