Dominance-Based Service Selection Scheme with Concurrent Requests

Dominance-Based Service Selection Scheme with Concurrent Requests
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并发请求下基于支配地位的服务选择方案

DOI:
10.5626/jcse.2012.6.2.89
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发表时间:
2012-06
影响因子:
--
通讯作者:
Farong Zhong
Farong Zhong
中科院分区:
--
文献类型:
--
作者:
Chaogang Tang;Qing Li;Yan Xiong;Shiting Wen;An Liu;Farong Zhong

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在动态Web服务环境中,Internet的性能是不可预测的;远程Web服务的可靠性和有效性也不清楚。因此,很难保证Web服务的质量(QoWS)属性不随动态Web服务环境的变化而波动。当在动态服务环境的上下文中规划组合服务时,现有工作还没有考虑到另一个方面,即并发性——对组合服务的多个请求可能同时到达。考虑到Web服务环境的动态性和请求的并发性,本文提出了一种服务选择方案,该方案采用top-k支配查询来生成组合解决方案,而不是针对给定的请求只选择最佳组合解决方案。实验结果验证了该方法的效率和有效性,并表明它优于基线和传统的服务选择方法。
In dynamic Web service environments, the performance of the Internet is unpredictable; the reliability and effectiveness of remote Web services are also unclear. Therefore, it can hardly be guaranteed that the quality of Web service (QoWS) attributes of Web services do not fluctuate with the dynamic Web service environments. When a composite service is planned in the context of dynamic service environments, there is another aspect which has not been taken into account by existing works, namely, concurrency - the fact that multiple requests to a composite service may arrive at the same time. Considering the dynamics of Web service environments and concurrency of requests, we propose in this paper a service selection scheme which adopts top-k dominating queries to generate a composition solution rather than only select the best composition solution for a given request. The experimental results have investigated the efficiency and effectiveness of our approach and shown that it outperforms baseline and traditional methods for service selection.
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