分布式嵌入式文件系统的设计  

Design of Distributed Embedded File System

作　　者：张鹏[1] 任晓瑞[1] 杨琼[1] 王冬 胡宁[1] ZHANG Peng;REN Xiao-rui;YANG Qiong;WANG Dong;HU Ning(Xi′an Aeronautics Computing Technique Research Institute,AVIC,Xi′an 710000,China)

机构地区：[1]航空工业西安航空计算技术研究所,陕西西安710000

出　　处：《航空计算技术》2023年第6期100-104,共5页Aeronautical Computing Technique

基　　金：国家重点研发计划项目资助(2017YFB1301100)。

摘　　要：针对当前航空电子分布式嵌入式计算机目前采用NFSV3协议网络文件系统,存在单点故障、服务器性能瓶颈,以及嵌入式环境各种资源受限等约束等问题,提出了基于集群架构的分布式嵌入式文件系统方案。总体架构定义了客户端-元数据服务器-数据服务器分布式文件管理集群架构,透明访问设计采用了精简三级统一路径名和文件服务接口子集;分布式通信设计采用了基于DDS的RPC服务框架,分块及布局管理设计采用表驱动的动态分配方式实现了文件的分块和多副本管理,元数据服务器容错设计采用HA高可用主从数据库方式实现主从元数据服务器状态的实时同步。最后通过搭建分布式嵌入式计算机测试环境,验证了原型系统的功能和性能。Aiming at the problems of single point of failure,server performance bottleneck,limited resources in embedded environment and so on,the distributed embedded file system scheme based on cluster architecture is proposed,and the overall architecture defines the distributed file management cluster architecture of client-metadata server-data server.Transparent access design adopts simplified three-level uniform path name and file service interface subset,distributed communication design adopts RPC service framework based on DDS,block and layout management design adopts table-driven dynamic allocation method to realize file block and multi-copy management,and metadata server fault-tolerant design adopts HA highly available master-slave database to realize real-time synchronization of master-slave metadata server status.Finally,the function and performance of the prototype system are verified by building a distributed embedded computer test environment.

关 键 词：嵌入式 分布式文件系统 RPC 布局管理 容错管理 

分 类 号：TP316[自动化与计算机技术—计算机软件与理论]