High Availability Of System Resources And Application Performance To Ensure That Research And To Achieve

With the rapid development of software technology, high availability becomes very important. High Availability has been so important for the key systems as one basic index. Network system of the failure recovery means the failed part should be switched to a standby server. Network system should be provided with redundant facilities and failure recovery should be adopted.The whole regard of hardware, system software, middleware, application is required on the realization of high availability, so that speedy restoration and the data consistency are assured in case of any segment invalidation.The monitor strategy of high availability system is studied and the solution of monitoring all key resources of a high availability system is discussed based on the prototype of 3-host model. Hardware, operating system, network resources, DBMS, the running mode of applications are wholly covered in the thesis.How to ensure 7*24 hours constant work under unexpected fault is emphasized. Based on the analysis, the prototype of the high availability system is proposed and some experiment is conducted.Finally, further work in the research is summarized and the way of its development, application prospect and its faced challenge are pointed out.