一种读写分离的分布式元数据管理方法——以“数字城市”应用为例  

A Distributed Metadata Management Method Based on Separation of Read and Write——Taking “Digital City” Applications as an Example

作　　者：刘小俊[1,2] 徐正全[1] 潘少明[1] 

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,武汉市珞喻路129号430079 [2]黄冈师范学院

出　　处：《武汉大学学报（信息科学版）》2013年第10期1248-1252,共5页Geomatics and Information Science of Wuhan University

基　　金：国家973计划资助项目(2011CB302306);湖北省教育厅科学研究基金资助项目(B20122704);国家自然科学基金资助项目(41271398)

摘　　要：针对动态"数字城市"的海量存储需求,在分析其存储负载特征的基础上,提出了一种读写分离的分布式元数据管理方法。该方法将目录子树分区和Hash两类算法融合在一起,一方面充分开发了目录的存储局部性,另一方面保障了系统的负载均衡。同时,在分离的两类元数据服务器之间采取基于服务需求的发布控制算法以保证系统写性能。实验表明,该方法在提高系统性能、均衡元数据分布等方面具有明显的优势。Aimed to the requirement of dynamic mass storage of ＂digital city＂, and based on analysis of the load characteristics of its storage, a separation of read and write distributed metadata management method is proposed. This method integrates the directory sub-tree partitioning with Hash algorithm together. On the one hand, the full development of the di- rectory storage locality. On the other hand the efficient protection of the system load balan- cing. At the same time, in order to ensure writ performance of system, release control algo rithm based on service demand is taken between the separation of the two types of metadata server. The experimental results of prototype system show that the proposed method has ob- vious advantages in improving the system performance, equalizing metadata distribution.

关 键 词：元数据管理 目录子树 HASH 数字城市 

分 类 号：P208[天文地球—地图制图学与地理信息工程]