Recovery Support for Internet-Based Real-Time Collaborative Editing Systems
ICCNMC '01 Proceedings of the 2001 International Conference on Computer Networks and Mobile Computing (ICCNMC'01)
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In this paper, we discuss how to replicate a server in order to obtain fault-tolerant services. In the active replication, all the requests from a client are performed by all the server replicas in the same order. The replicas are rather placed on heterogeneous computers interconnected in a wide-area network (WAN), e.g. the Inter- net, where each communication channel has different message transmission delay and bandwidth. Hence, the response times of the replicas observed by the clients are not the same. We newly propose a pseudo-active replication where the client does not wait for other responses after receiving one response and slower replicas do not perform every request performed by the faster replicas.