Garbage recycling method, device and equipment for solid state disk and storage medium

Abstract

The invention discloses a garbage collection method, device and equipment for a solid state disk and a computer readable storage medium, and the method comprises the steps: reading an L2P table, and obtaining a reading task corresponding to unit data needing to be read; wherein the unit data is data of a preset unit size; judging whether the same batch of reading tasks corresponding to the currentreading task exist in n reading tasks after the current reading task or not; wherein the unit data corresponding to the same batch of reading tasks and the unit data corresponding to the current reading task belong to the same storage page; if so, initiating a common reading operation of the unit data corresponding to the current reading task and the same batch of reading tasks. By initiating a common reading operation of a plurality of unit data belonging to the same storage page, the read operation unit in garbage collection of the solid state disk is improved from one unit data to a plurality of unit data, the number of read operations can be reduced, and the probability of hitting cache is increased, so that the garbage collection efficiency is improved, and the random writing performance of the solid state disk is improved.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a garbage collection method, device, equipment and computer-readable storage medium for a solid-state hard disk. Background technique [0002] With the development of science and technology in modern society, more and more computers use solid-state drives for data storage. [0003] In the prior art, since the l2p table (logic-physical mapping table) in the solid-state hard disk is in units of 4k, the corresponding garbage collection (garbage collection, gc) also performs flash read (or nand read) operations in units of 4k, The actual flash read operation is performed in units of pages. When the flash read operation is performed, the data of one page (storage page, such as 16k) is read to its local cache (cache memory), and then the actual required 4k data is selected from the cache and provided. Each lun (logical unit number) has an independent cache for read / write / erase oper...

AI Technical Summary

Problems solved by technology

[0004] From the perspective of the efficiency of each stage of garbage collection of solid state drives, flash read is less efficient than flash write, that is, it takes a long time to set GC stripes, which affects the overall efficiency of garbage collection

Images