Distributed Database Research, Using P2p Technology

Through the development for many years, the database system has already developed into a kind of quite ripe data management system. But with the development of computer network, the security of the database system becomes the focal point that database developer and user pay close attention to more and more. Various safe means are applied to development and use of the database progressively, including the safety certification mechanism in the system, safe precaution tool and backup of the system outside the system resume the mechanism etc..This text has introduced the development of present P2P technology at first. It has explained the meaning of P2P technology, employ the situation and develop the course actually. Then it analyzed the security risk question that the database exists when employed. It has introduced windows file system driver develop, build up and develop course and relevant data structural norm finally. Aafter the above-mentioned knowledge prepare, concrete careful introduction realization course of event this, having introduced the overall design of the system at first, then a copy of module has proved the function, structure of the data, procotol, procedure and function of every module are realized.In this project, I took part in the reaserch of the subjiect, and took charge of the designing and development of the software, and took long time to debug to mak it became a steady product. In the end of this thesis, I describe the solution of difficulties I meet in the procedure for debugging.