Solid state disk mapping table delay updating method and device, computer equipment and storage medium

Abstract

The invention relates to a solid state disk mapping table delay updating method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining a user write command, and distributing a temporary mapping table and a corresponding mapping table item bitmap for the write command; allocating an address for the write command, updating a temporary mapping table, setting a corresponding bit in the corresponding mapping table item bitmap, and identifying the corresponding bit as a valid mapping table item; when the system is idle, traversing all the temporary mapping tables and loading mapping pages corresponding to the temporary mapping tables; combining effective mapping table items in a temporary mapping table indicated in the mapping table item bitmap into the loaded mapping table; and releasing the temporary mapping table. In the process of processing the write command, when the system is idle, the mapping page corresponding to the temporary mapping cache is loaded from the NAND and combined to generate the newest mapping table, so that the mapping table is prevented from being loaded in the process of responding to the write command of the host, and the write performance of the system can be effectively improved.

Description

technical field [0001] The present invention relates to the technical field of storage systems, in particular to a method, device, computer equipment and storage medium for delayed update of a solid-state hard disk mapping table. Background technique [0002] With the development of solid state disk technology, SSD (Solid State Disk, solid state disk) has been widely used in various occasions, and has gradually replaced traditional HDD (Hard Disk Drive, hard disk drive) in the PC market. Provide users with a better experience. [0003] At present, the competition in the field of consumer SSDs is becoming more and more fierce. Low-cost SSDs can take the initiative in the market, and the cost of flash memory and DRAM in an SSD is relatively high. Therefore, in order to reduce costs, TLC (Triple Level Cell) Flash memory plus DRAM-Less master control is widely used. In the traditional technology, DRAM-Less SSD usually needs to load the required mapping table items from NAND du...

AI Technical Summary

Problems solved by technology

In the traditional technology, DRAM-Less SSD usually needs to load the required mapping table items from NAND during the process of responding to the host read and write commands due to the small space available for caching the mapping table. The process of loading the mapping table will affect Response to host commands

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