The Service Destroy Tolerant And The None-person-keep-watch Methods In The Disaster Tolerant System

The fast development of the computer and network continuously pushes the develpment of the information system, and the related persons are paying more and more attention to the importance of the data. But the information system faces many dangers and theats, such as earthquake, flood and wars. So how to guarantee the sercuiry and stability of the data is the problem that needs to be solved immediately. Among the current resolutions of the disaster tolerant system, some need extra communication devices, such as fiber, which causes enormously rise of the total cost; some influence the original produce system dramatically which results in the low performance of the system.The key point to evaluate a disaster tolerant system is whether this system can guarantee the stability and robust of the production system, that is to say, whether there is an effective mechanism to guarantee the following things:When there are some disasters or when somethings are wrong, the disaster tolerant system can adopt corresponding solutions to provide the continuous service and the interruption of the disater cannot be detected by the outside world;When the disaster tolerant system is running, it can support the daily routine work such management, maintance and monitoring without persons keeping watch, to guranteen the robust of the system and lower the cost of the system.To resolve those above problems, this paper provide a service tolerant method and a none-person-keep-watch method in the disaster tolerant system, so that it guantees the stability and the robust of the system.