The Design And Implementation Of The Online Dual Backup In The Mobile Supervision System

With the development of computer,the computer fault-tolerant system is very important in many fileds.computer fault-tolerant system ensures the system continue to execute the procedure when some errors come,and provides the duplicated service for the system.In this paper,through developing the 155M2IP system for shanghai dongzhou company,we introduce a part of the 155M2IP system -the implementation of Online Dual Backup system,we named this system DB155M2IP for convenient.the Online Dual Backup system not only accords with the users'requests but also provides uninterrupted and real time service.in addition through testing,the hot swap time of Online Dual Backup system between primary system and secondry system is very small.in this paper ,it's no more than 10 seconds .In the procedure of the implementation of the DB155M2IP, we also study the theory and concept of the Online Dual Backup system,the difference between DB155M2IP and the Online Dual Backup system ,the theory of online,the theory of hot swap between primary system and secondry system,fault upload and the implementation of the system software..After implementation the DB155M2IP,we test the performance of the DB155M2IP ,the hot time between primary system and secondry system ,fault upload,fault test,fault location.Finally,through analysising every module of Online Dual Backup system,we select the markov module to describe the DB155M2IP system,and study the reliability and safety of the DB155M2IP system.in addition,we analysis the reliability and safety of the DB155M2IP system.use the language-MATLAB.through the results,we look up the parameters which effects he reliability and safety of the Online Dual Backup system.this is very important for user to understand the reliability and safety of the Online Dual Backup system throuth theoty analysis.At last,we give out some tentative plans and some suggestion for the Online Dual Backup system,and analysis some effects of the Online Dual Backup system.it's very importmant in practice.