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首页> 外文期刊>International Journal of Cooperative Information Systems >SYNCHRONIZATION ANALYSIS FOR DECENTRALIZING COMPOSITE WEB SERVICES
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SYNCHRONIZATION ANALYSIS FOR DECENTRALIZING COMPOSITE WEB SERVICES

机译：去中心化复合Web服务的同步分析

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摘要

Web Services are emerging as the standard mechanism for making information and software available programmatically via the Internet, and as building blocks for applications. A composite web service may be built using multiple component web services. Once its specification has been developed, the composite service may be orchestrated either using a centralized engine or in a decentralized fashion. Decentralized orchestration brings performance benefits, and improves scalability and concurrency. Dynamic binding coupled with decentralized orchestration adds high availability and fault tolerance to the system. However in such systems, the coordination between components needs to be carefully designed to ensure correct execution of the composite and to limit the synchronization overheads. In this paper, we categorize different forms of concurrency and provide an algorithm to identify these forms in a composite service specification. We explore different mechanisms for transferring data between the components in the presence of different forms of concurrency. Then we experimentally evaluate the efficiency and scalability of each mechanism. We also analyze the coordination requirements of a decentralized orchestration in the presence of dynamic binding and fault propagation.
机译：Web服务正在成为通过Internet以编程方式使信息和软件可用的标准机制，并成为应用程序的构建块。可以使用多个组件Web服务来构建复合Web服务。一旦制定了其规范，就可以使用集中式引擎或以分散的方式来编排复合服务。分散式编排带来了性能优势，并改善了可伸缩性和并发性。动态绑定与分散的业务流程相结合，为系统增加了高可用性和容错能力。但是，在此类系统中，需要仔细设计组件之间的协调，以确保正确执行复合程序并限制同步开销。在本文中，我们对并发的不同形式进行了分类，并提供了一种算法来识别组合服务规范中的这些形式。我们探讨了在不同形式的并发下在组件之间传输数据的不同机制。然后，我们通过实验评估每种机制的效率和可伸缩性。我们还分析了在存在动态绑定和故障传播的情况下分散业务流程的协调需求。

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