Persistent Data Layout in File Systems

作     者：LUO Shengmei LU Youyou YANG Hongzhang SHU Jiwu ZHANG Jiacheng 

作者机构：ZTE CorporationShenzhen 518057China Tsinghua UniversityBeijing 100084China 

出 版 物：《ZTE Communications》 (中兴通讯技术（英文版）)

年 卷 期：2018年第16卷第3期

页      面：59-66页

学科分类：08[工学] 081201[工学-计算机系统结构] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by ZTE Industry-Academia-Research Cooperation Funds 

主　　题：data layout file system persistent storage solid state drive（SSD） 

摘      要：Data layout in a file system is the organization of data stored in external storages. The data layout has a huge impact on performance of storage systems. We survey three main kinds of data layout in traditional file systems： in-place update file system, log-structured file system, and copy-on-write file sys- tem. Each file system has its own strengths and weaknesses under different circumstances. We also include a recent us- age of persistent layout in a file system that combines both flash memory and byte- addressable non- volatile memory. With this survey, we conclude that persistent data layout in file systems may evolve dramatically in the era of emerging non-volatile memory.