融合NAS和SAN的存储网络设计与实现

针对目前两种主流网络存储系统存在的缺陷,本文提出和实现了一种在IP协议下融合NAS和SAN的统一存储网络系统.通过全局多协议文件系统,统一存储网络能同时支持文件协议和块协议,实现了NAS设备和SAN设备在IP上的无缝融合,满足了应用开放性、高扩展和海量存储的需求;通过iSCSI软件实现模块,统一存储网络能同时为客户提供文件I/O和块I/O服务,具有NAS和SAN二者的优点;通过自主存储代理文件系统,统一存储网络能同时通过服务器通道或高速附网通道向客户机提供数据,提高了系统的I/O响应速度,减少了服务器瓶颈.实验结果显示,统一存储网络系统具有超高速的文件I/O和块I/O响应速度,能为网络提供性能、扩展性、兼容性、性价比都更好的海量存储系统.

A New Storage Network Integrated with NAS and SAN

Nowadays,NAS and SAN are served as two main network storage systems,both of which have their advantages and disadvantages.With the dramatic increase of the network application,however,a new network storage architecture,Unified Storage Network(USN),in which NAS and SAN are integrated on the base of an IP,has been made.Firstly,by way of a Global Multi-Protocol File System(GMPFS),the USN combines NAS and SAN,achieving a high scalability and a large capacity.Secondly,with an iSCSI module,the USN serves the block I/O and file I/O simultaneously,combining both the advantages of NAS and SAN.Thirdly,through an Autonomic Storage Agency(ASA),the USN provides two types of data channels:a server channel and a high-speed network-attached channel,creating a direct access to the storage device for its client.And in the concerned experiments,the USN has turned out to be an improved network storage system of a great capacity with an ultra-high-throughput for both the file I/O and the block I/O.Compared with the existed NAS and SAN,this new system has proved to be better in terms of its performance,scalability,compatibity,high-availability and price,etc.