| Disaster recover system could keep the service of computer system working in greatest degree against disaster, and with its outstanding price/performance ratio and scalability, cluster system is becoming the trend of computer architecture. Then , in case of requirement of disaster recover system ,we add CSFS (Cluster Single File System,CSFS) which is a cluster file system with single-name-space support, remote data mirror support and the aim of it is to resolve the problem. CSFS is part of the project NHA(N High Availability cluster,NHA)that was developed by our team (North china institute of Computing Technology NHA team), and it is a software designed for NCIHA to manage cluster file system.Therefore it integrate disaster recover of data and application in effect by add remote data mirror to high availability cluster.This system adopts many key technology, such as the NAS technology,remote mirror technology,and bases on the SAN interlinkage technology of IP,also the snapshot technology, it solves the remote mirror function of single file system, and provides user single name space,the access of file storage and visit. The coherence of operation language can fulfill the compatibility of application program, and run the application program freely dispense with any changing. The excellent expansibility serves user more cultivatable node space, and increases the flexibility of system using. At the same time, this system has the ability if high useable support, single node fault will not influence the running of whole system.In the thesis, we first introduce the basic concepts about cluster and single system image,disaster recovery&data backup and then present the mechanism of the project NHA.After that describe the design, structure and mechanism of the System. Finally, provide detailed implementation of remote data mirror of the System. |
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