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SSD cold and hot data separation method based on out-of-band interaction

A technology of cold and hot data and separation methods, applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc.

Pending Publication Date: 2020-10-27
SHANDONG SINOCHIP SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a SSD cold and hot data separation method based on out-of-band interaction, which is used to solve the wear leveling problem of Nand Flash storage media in SSD devices

Method used

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  • SSD cold and hot data separation method based on out-of-band interaction
  • SSD cold and hot data separation method based on out-of-band interaction
  • SSD cold and hot data separation method based on out-of-band interaction

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Embodiment 1

[0043] This embodiment discloses a method for separating hot and cold data of SSD based on out-of-band interaction. The separation of hot and cold data of SSD in this embodiment depends on the way of out-of-band interaction, so the out-of-band management technology is implemented first. In order to realize the out-of-band management technology, it is necessary for the host Host and the SSD device to implement a dedicated data interface independent of the main transmission channel, and to implement related drivers and business programs based on this data interface.

[0044] In view of the defects of the existing simplex data mode and half-duplex data mode, this embodiment provides an out-of-band management path of a full-duplex data mode, based on the SMBus / IIC interface to realize the hardware and software architecture of Host and SSD equipment, such as figure 1 As shown, the specific implementation is as follows: Host and SSD devices each need to implement two SMBus / IIC interf...

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Abstract

The invention discloses an SSD cold and hot data separation method based on out-of-band interaction. The method comprises the following steps: S01) an out-of-band management path independent of a maintransmission path is established between a host and SSD equipment; S02) the SSD equipment sends LBA access information to the host through the out-of-band management path, wherein the LBA access information comprises an LBA value and write operation execution time; S03) the host completes cold and hot classification of all LBAs based on the LBA access information, and sends a classification result to SSD equipment through an out-of-band management path; S04, the SSD equipment completes physical separation of the cold data and the hot data according to the classification result. The method isused for solving the abrasion balance problem of the Nand Flash storage medium in the SSD equipment.

Description

technical field [0001] The invention relates to the field of flash memory storage control, in particular to a method for separating cold and hot data of an SSD based on out-of-band interaction. Background technique [0002] Solid State Disk (SSD) mainly uses Nand Flash as its permanent storage medium, and records 0 and 1 through potential level or phase state difference, so it has fast read and write speed, small size, light weight, low power consumption Low, good shock resistance, but due to the limitation of the number of Nand Flash programming and erasing operations (PE), it is necessary to perform wear leveling operations on it to ensure that the PE times of all physical blocks in the Nand Flash are balanced. One of the ways to achieve wear leveling is to separate all blocks from hot and cold, that is, to store data with high write operation frequency (hot data) in blocks with low PE times, and store data with low frequency in In blocks with high PE times, the key lies ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06G06K9/62
CPCG06F3/0607G06F3/0638G06F3/0656G06F3/0688G06F18/23213
Inventor 刘忞斋高美洲孙大朋郭泰裴永航江加国刘岩高翔季亚男
Owner SHANDONG SINOCHIP SEMICON