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Scheduling method, device, flash memory device and system

A scheduling method and technology of flash memory, applied in the field of storage, can solve problems such as extended read time of flash memory devices

Active Publication Date: 2021-10-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the traditional scheduling method makes the read latency of the flash device longer

Method used

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  • Scheduling method, device, flash memory device and system
  • Scheduling method, device, flash memory device and system
  • Scheduling method, device, flash memory device and system

Examples

Experimental program
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Embodiment Construction

[0041] figure 1 is a schematic block diagram of a storage system applicable to an embodiment of the present invention. figure 1 The shown storage system 100 includes: a storage system controller and at least one storage medium. In the following embodiments of the present invention, the storage medium is a solid state disk (solid state drive, SSD) as an example for description. That is, the storage system 100 includes an SSD controller 110 and at least one SSD 120 . The SSD controller is used to manage at least one SSD 120 . Each SSD120 includes a flash memory (flash) controller 121 and at least one NAND flash memory chip 122, and each NAND flash memory chip includes a plurality of flash memory wafers (die), and an internal bus is used between the flash memory controller and at least one flash memory wafer connect. Among them, internal buses such as the Toggle standard bus adopted by flash memory NAND chips of Samsung and Toshiba, and the Open NAND Flash Interface (Open NAN...

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PUM

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Abstract

The present application provides a scheduling method, device, flash memory device and system, the method is applied to a flash memory device, the flash memory device includes a flash memory controller and a plurality of flash memory wafers, and the flash memory controller is connected to the plurality of flash memory wafers through a channel , the method includes: during the process of transmitting a write request through the channel, the flash memory controller determines a first read request or first data to be transmitted, the first read request is used for the host from the plurality of flash memory wafers Read data in the first flash memory wafer, the first data is data read from any one of the plurality of flash memory wafers; the flash memory controller suspends the transmission of the write request through the channel to schedule the write request The first read request or the first data is transmitted through the channel, thereby reducing the time delay for the flash memory device to process the read request.

Description

technical field [0001] The present application relates to the field of storage, and more particularly, to a scheduling method, device, flash memory device and system. Background technique [0002] A flash memory device is a storage device using a flash memory as a storage medium, such as a solid state drive (solid state drives, SSD). Regarding the quality of service (quality of service, QoS) of the flash memory device, the read delay generated by the flash memory device in processing the read request will affect the processing efficiency and duration of the entire flash memory device. [0003] Generally, a flash memory device includes a flash memory controller and a flash die, and the flash memory controller and the flash memory die can be connected through an internal bus, wherein the connection between the flash memory controller and each flash memory die is called a channel , the flash controller can schedule requests to be transmitted or data to be transmitted through t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06G06F13/16
CPCG06F3/0611G06F3/0629G06F3/0658G06F3/0679G06F13/1668
Inventor 赵献明褚小伟陈昊
Owner HUAWEI TECH CO LTD