当前三大主流磁盘阵列系统的技术比较

A Technical Comparision of Three Main Redundant Array of Inexpensive Disks at Present

关键词:  磁盘阵列  概述  技术比较  DAS  SAN  NAS

Key words:  Raid  sumary  technical comparison  DAS  SAN  NAS

摘要:

在介绍当前三大主流磁盘阵列系统:DASraid、SANraid和NASraid的基础上,把SANraid分别与DASraid、NASraid作技术比较,得出DASraid安全性高、造价低,但连接距离短、工作效率和业务持续性不高;NASraid技术成熟、成本低廉、安装配置快捷方便,但性能略逊于SANraid;SANraid有长距离连接、容错容灾、高可用性、集群共享、高伸缩性、扩充性及保障投资等特性,但造价高昂。然后结合广西发展计划委员会电子政务系统建设,说明SANraid更适合投入大且性能要求高的行业,NASraid则适用于性能要求次一级的行业,而DASraid目前在国内许多一般性的行业中仍得到广泛的应用。

Abstract:

Based on the introduce to the three main Redundant Array of Inexpensive Disks at present:DASraid,SANraid and NASraid,the technical comparisons are taking between SANraid to the other two.The results showed that DASraid has the traits of high safety and low cost, but short of linking distance,low work efficiency and business durative;NASraid is matured in technique,low cost and easy installation,but is inferior to SANraid in functions;SANraid has the traits of long distance linking,fault-tolerance,disaster-tolerance,powerful usability,workgroups share,high retractility and expansibility,investment ensurance etc.,but is costliness.Then exemplified by the development of Guangxi Development & Planning Committee's electro-government system,SANraid is proved to be more fit for the industries of high investment that need power functionality,while NASraid may satiable for needs of inferior functionality;and DASraid is now still widely adopted by many ordinary users in China.