Digital Organism Database System Bulk Synchronous Design And Realization

With the popularization of computer and the development of the information technology, more and more information were digitized, and transmited in the internet, the data increased in a drastically speed. As a result, in the recent years and future, how to store and manage these data will become a focus concerned by human. In the 80's and 90's, these data were stored in the expensive middle or mini computers. And the system manager must back up the data periodically. So the enterprise should make a huge investment, and once the machine gets some error, the service will be stopped , make lots od data loss and the enterprise will suffer from some loss. In recent years, people impenetrate the distribute system, along with the high development of the hardware, the high-speed network come to be mature, and the open-source operating system of Linux has been developed quickly, more and more developer make extern develop and many distributed system based on Linux has been developed to store and manage data. These systems are generally composed by high-performance PCs connected by the high-speed LAN. Managed by the distributed operating system, it can guarantee the reliability of the data and the high performance compare to one PC.A new generation of distributed system - DOS (Digital Organism System) has been designed to arrange the resources and storage spaces of computers in a wide area network in the our research office. DOS, which combines with distributed character of P2P, focuses on resource management to meet the need of various network applications. The primary task of DOS is resource management and task dispatch. For the distributed information management, the most important part is data consistency in the every servers,the DOS system have the ability keep strong data consistency for most of application, such as bank, government,big comperty and so on. But it is lavish for application of media,net information etc. so, in order to meet more user can use it, the efficiency of resource accessing must be improved and taken it into account all the time in the system designed and implement.In the DOS system, introduced two method-strong and week data consistency. This document has designed and implemented batch synchronization system of DOSDB based on the theory of week data consistency, and the arm is that offer servers for users as soon as possible.The system use batch synchronize database resource,it improve the speed and make DOSDBMS have more using field.The result of test has shown that this system can meet the demands of user effectively.