The Apply Of The Distributed Database In The Management Information System

The exchange of message is an important part in the economic activities of the 21st century. The speed of getting message has proximate been bound up with the profit of the company. With the enterprise's structure more and more separated, intensive database has not satisfied the need of the users any longer. And the technology of the distributed database will become the role. The author has done some research on the applying distributed database to the information management system by much analysis and practice.The distributed database means a database witch separated in different places and united in logic. It can be divided to two sorts there are alike structure and different structure. And it has characters such as using in common, independence, controlling redundancy and separated transaction of business. The research on distributed database began from the 1970's and some product has been put to use in the 1990's. The future direction of the development of the distributed includes opening database sever, collocate data sever, distributed knowledge system.The module structure of distributed database includes local internal stratum, local concept stratum, global concept stratum and global internal stratum. The management of the distributed system is composed of global database management system, local database management system and communication management. Net, communication device, distributed management system, distributed database, system administrator and software word witch make up'of the whole distributed system.The first work is distributing and demarcating data in order to send message. Distributing means dividing clata on the grounds of the needs of users and demarcating is putting different framework to varying places. Distributing includes horizontal, vertical, mixed and inductive dividing modes. The collocated transaction can insure of efficient and correct work and it has . lock and time impression control models. Integrated restriction can stand up for the data's accordance and total of the whole distributed database aftersending data. The paper also discusses build an authority control via end users access to make sure of the safety of the distributed database system.The replicate model in the Sql sever 2000 is a tool to establish distributed database system quickly and facilities by configuration replication, founding publish, subscribing publish, applying original snapshot. The replication has three mode as snapshot, transaction and amalgamate .The procedure can be supervised by oversight device.The paper testified the application of the distributed database technology in the management information system by designing a system for a medical corporation as practical example in detail witch includes require analysis, devising function, designing distributed database, safety insurance and applying system. It can be believed that the distributed database can satisfy the needs of the separated corporation structure, be a substantial basis to improve the efficiency of the work and create more profit.