星载高速碎片式文件存储访问系统设计  

Design of On-board High-speed Patch File Storage Access System

作　　者：杨宜禥 禹霁阳[3] 蒋帅 李欣[3] 黄丹 YANG Yiqi;YU Jiyang;JIANG Shuai;LI Xin;HUANG Dan(School of Air and Missile Defense,Air Force Engineering University,Xi’an 710051,China;Chongqing High-tech Zone Pegasus Innovation Institute,Chongqing 400050,China;Beijing Institute of Spacecraft System Engineering,Beijing 100094,China;Science Research Institute of China North Industries Group Corporation,Beijing 100089,China)

机构地区：[1]空军工程大学防空反导学院,西安710051 [2]重庆高新区飞马创新研究院,重庆400050 [3]北京空间飞行器总体设计部,北京100094 [4]中国兵器科学研究院,北京100089

出　　处：《航天器工程》2019年第6期65-72,共8页Spacecraft Engineering

基　　金：国家重大科技专项工程

摘　　要：针对碎片式文件存储访问系统访问效率较低的局限性,以及星上存储应用的实时性特点,从碎片式文件存储访问结构和基于NANDFlash的存储布局策略出发,提出一种星载高速碎片式文件存储访问(PFSA)系统.针对Flash中的块操作建立数据访问模型,将不同的碎片式文件存放在不同的Flash基片上,以提高并发数据的访问速度;采用磁电存储器(MRAM)存储百字节的碎片式文件,当MRAM内部数据达到阈值时一次性搬入Flash的固定块内,以减少碎片式文件的读写Flash时间.通过在板卡上的仿真试验对平均写入性能、大批量碎片式文件写入性能、文件传输性能及块擦除均衡性能进行测试,结果表明:相比于以往碎片式文件存储设计,访问速度、传输延迟、擦除均衡性能均得以提升,进而验证了PFSA系统设计的有效性.Aiming at the low efficiency of existing research on the patch file storage access system and the on-board real-time storage application characteristics,an on-board high-speed PFSA(patch file storage access)system is proposed based on the patch file storage access structure and the NAND Flash-based storage layout strategy.According to the block operation in the Flash,the data access model is established,and the different patch files are stored on the different Flash substrates to improve the access speed of concurrent data.Adopting MRAM(magnetic random access memory)to store the patch files less than hundreds of bytes,and all files move to the fixed blocks when the data in the MRAM exceed a threshold,to reduce the Flash reading and writing time for patch files.Through the board simulation experiment on the average writing performance,large number of patch files writing performance,file transmission performance and block erasure equilibrium performance,the experiment results show that the speed of patch file storage access,transition delay and erasure balance are improved,and the validity of the design proposed is verified.

关 键 词：星载碎片式文件 文件存储访问 磁电存储器 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]