Research Of Key Technologies In Integrated Information System Based On Distributed Database

With the development of computer science, the information technology has been used in economy, defense, education, and many other fields of the society. The database technology is one of the most important information technologies. It has been used widely for data storage and data management. At present, there are several important research fields based on the database technology. One of them is distributed database which is high availability and scalable. The research of this paper is about the key technologies of integrated information system based on distributed database.This paper focused on the framework and application of distributed database. We also introduced the system environment, system framework, and mode framework of distributed database. The relationship between the system framework, mode framework of distributed database and the distribute technology has been discussed in detail.We put the research emphasis on the key technologies of distributed database for the integrated information system, which includes the fragmentation, the allocation, the querying, the synchronization of data and the synchronization of time. The standard function of fragmentation and the goal function of allocation were provided in this paper. We discussed the profit of allocation. We also designed the data service based on middleware, the data synchronization mechanism and the time synchronization mechanism.This paper researched the cluster system to meet the requirements of high availability in the integrated information system. Then we designed a high availability system based on XML log files and MSCS API. To avoid the collapse on data level, we provided a minimal dataset and a minimal capacity. Furthermore, we gave the system adaptive capability to different data environment.At the end of this paper, we gave an integrated information system based on our research work, and provided the details of it.