Research And Application Of The VTS Dual-Machine Hot-Standby System

As the rapid development of the China's industry,such as maritime transport,ship transport,the Maritime Bureau VTS(Vessel Traffic Service) system has been widely used.Thus requirements of the reliability of the VTS server also proposed increasing and the reliability of server systems has gradually become a research hotspot.The focus of this paper is to propose to improve the detection rate of the system and implement the server platform of the VTS system by research on the reliability of the dual-machine hot standby system.The research is based on the VTS project of MSA.Firstly,the paper proposed to achieve the overall design based on the dual-machine hot standby system theory and key technologies.The work mode of hot standby system is master-slave,in accordance with the characteristics of VTS system which consists of three layers of the operating system layer,the dual-machine manage layer and the application service layer.And the design of the working process and the function analysis of dual-machine software modules are described.Secondly,using the Markov forecasting method based on Markov chain,research on the reliability of the VTS dual-machine hot standby system. To establish the system of the corresponding mathematical model based on analysis and prediction in the system state of the work,and solve the differential equations,through the MATLAB analysis of reliability data and curves,to illustrate the relevant parameters on the impact of system reliability,and then analyzed the impact on the reliability of the dual-machine hot standby system factors,by acceding to the process of monitoring the application of state functions and to add a heartbeat link to improve the detection rate of the dual-machine system.Thus enhance the reliability.Finally,in accordance with the VTS system,deploy and achieve the dual-machine hot standby system,and give the specific description of the setting profile and related scripts.Fault injection method is used to carry out functional tests on the system.By reliability comparison before and after the improvement,verify the increase of the reliability.In this paper,the dual-machine hot standby system has been successful applied in the VTS system of the QinHuangDao,ChongQing and other Maritime Bureau.At present,the system performance and stability,the user response is good,the protection of the VTS system at the same time continuing to run to meet the reliability requirements of the server.