Abstract
Service-oriented systems can be composed by different services from different providers. If one or more constitutes of services-oriented systems become fault at runtime, service-oriented systems cannot continue to serve their business function effectively. We propose an effective recovery approach for services based systems. The approach tries to replace each faulty service firstly. If some faulty services have not the candidate services with similar function, we will construct for each faulty service and tries to replace the region. Algorithm DRRank is designed to search for a substitution region that have a small number of replaceable services, some faulty and some healthy. Using our proposed approach, services-oriented systems can be recovered by replacing services in these selected regions rather than the whole service-oriented systems. As a result, we can reduce the computational complexity and the recovery overheads. At last, case study is given to show that how our approach works.
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