CSRAID:一种新的大规模RAID系统结构  

CSRAID: a New Storage Architecture for Large-scale RAID

作　　者：刘艳[1] 谢长生[1] 李怀阳[1] 赵振[1] 

机构地区：[1]华中科技大学计算机学院外存储国家专业实验室,湖北武汉430074

出　　处：《小型微型计算机系统》2007年第1期172-177,共6页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60273073)资助.

摘　　要：借鉴集群文件系统“分布式虚拟磁盘”的概念,针对大规模RAID提出了一种新的存储结构CSRAID,它由若干结构不同的SubRAID组成.数据可以根据负载特征的变化动态迁移到最适合的SubRAID,SubRAID的数目和结构,也可以适应系统负载的发展而调整,从而CSRAID系统能为各用户提供一个由SubRAID物理存储空间构成的、始终适应用户I/O需求的虚拟磁盘.仿真实验结果表明与传统结构大规模RAID系统相比,同样大小存储空间的CSRAID系统的I/O性能具有显著优势.Referring to the concept of “distributed virtual disks” in cluster file system, this paper proposes a new storage architecture for large-scale RAID--CSRAID, which consists of several different structure SubRAIDs. User data can migrate into optimal SubRAID dynamically according tO their access characteristics ; the number of SubRAID and the structure of each SubRAID can also be adjusted to the evolution of userss load, thus the whole CSRAID system can always provide a virtual disk composed of the physical storage space of SubRAIDs for each user to satisfy its I/O need. Simulation results demonstrate significant I/O performance advantage in CSRAID, compared with the traditional large-scale RAIDS or RAID1 of the same storage space.

关 键 词：RAID 集群文件系统 虚拟磁盘 数据迁移 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]