A Methodology for Assessing the Robustness of Distributed Information System (DIS)

<正> This paper discusses a methodology for evaluating the robustness of a distributed system in the riwter's consideration a DIS's system scheme. This DIS is a multi-microcomputer system suppported by a local network.Robustness is evaluated in term of availability. Two ar chi tectures are explored, a planar model and a hierarchical model.In the 3 level hierarchical model, users commumicate to higher level hosts via intermediate level microcomputers. the planar architecture has all machines on the same level.With the methodology, the robustness of DIS can be quantified.