OCFS：一种基于对象存储结构的可伸缩高性能集群文件系统  

OCFS： A scalable, high-performance cluster file system based on object storage architecture

作　　者：刘仲[1] 王涌[1] 章文嵩[1] 邓鹍[1] 王昭福[1] 

机构地区：[1]国防科学技术大学计算机学院,湖南长沙410073

出　　处：《通讯和计算机（中英文版）》2007年第6期1-13,共13页Journal of Communication and Computer

基　　金：本文得到国家自然科学基金（No.60503042）的资助.

摘　　要：提出了一种基于确定性随机分布算法分布元数据和数据对象的可伸缩集群文件系统结构。其中目录路径属性与目录对象分离的元数据管理方法，在提高系统性能、均衡元数据分布和减少元数据迁移等方面具有明显优势。提出的基于动态区间映射的数据对象布局算法，支持权重分布和副本，在均衡数据分布和最少迁移数据方面都具有统计意义上的最优性，有效解决了动态存储系统的数据均衡分布与可伸缩性问题。A scalable cluster file system architecture is proposed, which distributes metadata and data objects based on a deterministic pseudo-random algorithm. A metadata management method dividing directory path attributes from directory object is proposed, which has obvious advantages in improving the throughput, scalability, balancing metadata distribution and reducing metadata migration. A data object placement algorithm based on dynamic interval mapping is proposed, which supports weighted allocation of storage nodes and variable levels of object replication and is probabilistically optimal in both distributing data evenly and minimizing data movement. It efficiently resolves the problem of balancing data distribution in dynamic storage system and improves the scalability of the storage system.

关 键 词：对象存储 元数据管理 数据对象布局 可伸缩性 

分 类 号：TP302.8[自动化与计算机技术—计算机系统结构]