Abstract
The single-instance deployment mode can't meet the needs of the increasing user access, and multiple-instance deployment is a feasible scheme to improve the scalability of the service system. The traditional reliability analysis methods are aimed at the singleinstance deployment and they cannot be used to analyze the reliability of the service system of multi-instance deployment. To address this problem a new approach is proposed in this paper to analyze the reliability of service that a services system provided in the case of multiple-instance deployment. This approach extends the traditional useroriented system reliability analysis method, adopting a vector representing the reliabilities of the multiple instances of a component service to settle down the problem. To bring this method to fruition, a prototype framework is constructed and realized in Java, and a case study demonstrates this approach.
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