减轻读干扰的垃圾回收算法  

A Garbage Collection Algorithm of Reducing Read Disturb

作　　者：赵乾瑞 冉全[1] ZHAO Qianrui;RAN Quan(Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学,湖北武汉430205

出　　处：《现代信息科技》2024年第7期81-85,共5页Modern Information Technology

基　　金：武汉工程大学研究生创新基金(CX2021290)。

摘　　要：NAND闪存凭借许多特点让其在各种应用场景中得到广泛的应用,例如手机、平板电脑等,但是闪存也有两个受关注的特性:使用寿命和数据的可靠性。在闪存的使用过程中,读干扰对数据准确性的影响会随着时间的增长变大,因此,通过对读干扰造成的影响进行研究,提出了一种减轻读干扰的垃圾回收算法FRT-GC,该算法通过对每个闪存块的使用次数和使用频率进行统计计算,在合适的时机启动垃圾回收,最大限度地减轻读干扰造成的影响。实验验证该算法在减轻读干扰方面有很好的效果。NAND flash memory is widely used in various application scenarios due to its many characteristics,such as mobile phones,tablet computers and so on,but flash memory also has two characteristics of concern:service life and data reliability.In the using process of flash memory,the influence of read disturb on data accuracy will increase with time.Therefore,by studying the influence caused by read disturb,a garbage collection algorithm FRT-GC(Frequency and Read Times-Garbage Collection)that can reduce the influence caused by read disturb is proposed.This algorithm starts garbage collection at the right time by counting the usage times and frequency of each flash memory block,and minimizes the influence caused by read disturb.The experiments show that the algorithm has a good effect in reducing read disturb.

关 键 词：NAND闪存 垃圾回收 读干扰 FRT-GC 

分 类 号：TP333[自动化与计算机技术—计算机系统结构] TP312[自动化与计算机技术—计算机科学与技术]