Cache management method, solid state disk controller and solid state disk

Abstract

The embodiment of the invention relates to the field of solid state disk application, and discloses a cache management method, a solid state disk controller and a solid state disk, the solid state disk comprises a cache space, the cache space comprises a dirty data block linked list, the method comprises the following steps: obtaining a write command, and generating a first dirty data block for recording write command data information; and if the address range conflict exists between the first dirty data block and a second dirty data block in the dirty data block linked list, marking data in a conflict region in the second dirty data block as invalid, and inserting the first dirty data block into the dirty data block linked list. When the address range conflict exists between the first dirty data block and the second dirty data block in the dirty data block linked list, the data of the conflict region in the second dirty data block is marked as invalid, and the first dirty data block is inserted into the dirty data block linked list, so that the cache insertion and the data updating can be separated, the cache quick insertion is realized, and the cache insertion efficiency is improved. The command time delay in the write conflict scene is reduced. The system performance of the solid state disk is improved.

Description

technical field [0001] The present application relates to the application field of solid-state hard disks, in particular to a cache management method, a solid-state hard disk controller and a solid-state hard disk. Background technique [0002] Solid State Drives (SSD) are hard disks made of solid-state electronic storage chip arrays. Solid State Drives include a control unit and a storage unit (FLASH memory chip or DRAM memory chip). At present, a considerable part of the solid-state disk system has a dynamic random access memory (Dynamic Random Access Memory, DRAM), so the SSD has a relatively large data cache space for caching data. [0003] At present, write-back mode (Write-Back mode) is mostly used in enterprise-level SSD (Solid State Drive, solid state drive) to reduce time delay and improve performance. Part of the DRAM space on the disk is used as a cache space to cache data, and the cache management records the address range and status of this part of data. Gener...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a cache management method, a solid-state hard disk controller, and a solid-state hard disk, which solve the technical problem of long service processing time in the write conflict scenario existing in the existing solid-state hard disk, and realize reducing the command time in the write conflict scenario. Delay, improve system performance of SSD

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