Non-stop Internet model based on Circle Quorum System

Rapid developments in computer technology have resulted in greater reliance on distributed computing, typified by "client/server" or "subscriber/push" architectures. These servers provide central resource to individual clients on local area network or Internet systems. Unfortunately, frequent and unplanned network failures were routine, and downtime was not in hours, but in days. Cluster technology has solved the non-stop problem on local area network. However, most technologies including cluster today fail to ensure the non-stop Internet serving for its clients without stop while one or more servers have failed. With good performance on fault tolerance and availability, quorum system is very suitable to be applied in the distributed network system. In this paper, we modeled and developed a non-stop Internet service system based on a new quorum system, Circle Quorum System, for Boston Mutual Fund Broker, US. With three protocols, it provided highly available data services for clients on Internet.