Research And Design Of Fault Tolerant Algorithm In Redundant Services

As development of computer network and communication technology, distributed computing becomes the main computing technology. Currently, the developments of distributed applications, such as large transaction processing, real-time distributed computing and key damage-tolerant application, require more higher availability and performance in distributed system. So the redundant service is used in more and more distributed systems for improving availability and performance, and fault-tolerant algorithms are widely studied in redundant service management system.After studying more deeply the fault tolerant algorithm and load balancing technology in redundant services, active load balancing is introduced into the redundant service system, and a novel fault-tolerant algorithm is built in this paper. Under the conditions of guaranteeing the availability of redundant service system, the performance is effectively improved. The logic object model is based on CORBA and the prototype is implemented, additionally, system test results show the feasibility of the algorithm. The main work of this paper is as follows:a) By introducing the active idea into redundant service, the resource-saved load balancing is performed well.b) Requests are classified into read and write types, and both of which are dealt with accordingly. The parallel run model of requests is performed very simply and effectively.c) The consistency protocol of state replications is performed very simply and effectively.