摘要
全球数据量快速的增长使得NAS得以广泛应用,但是传统的NAS系统在设备发生故障时数据会丢失,难以满足现代存储对系统的高可用性和高可靠性的要求。本文提出了一种用于实现文件镜像功能的NAS系统框架结构,并且在VFS机制的基础之上,在Linux平台下,设计并实现了一种应用于这种结构的镜像文件系统(NASMFS)。它屏蔽了系统底层中各个NAS设备中文件系统的差别,给用户提供了一个安全、可靠的统一的存储目录空间,透明地完成文件镜像功能,在设备发生故障时能够从镜像的文件中恢复数据,从而在可用性、可靠性等方面弥补了传统NAS系统的不足,满足了应用的需要。
The rapid increase of Global data brings the extensive applications of NAS,but the data may lose when the devices occur failure in the traditional structure of NAS,from this point,traditional structure of NAS can not match the demands of a modern storage system in availability and reliability. This paper puts forward a NAS frame structure ,which is applied in files mirror,and based on VFS mechanism,designs and implements a file system under Linux platform,named Mirror File System (NASMFS),which is applied in this NAS frame structure. This file system screens the differences of each NAS device's file system in the low-level of a system ,and it provides a secure and reliable uniform storage directory space to clients ,accomplishes the mirror function transparently as well,so it can restore the data from the mirror files when the devices occur failure. Concerning the availability and reliability of the traditional structure of NAS,this paper offsets these limitations,and meets the demands of applications.
出处
《计算机科学》
CSCD
北大核心
2004年第9期119-123,共5页
Computer Science
基金
国家自然科学基金(编号:60173043)
