Computer Science ›› 2015, Vol. 42 ›› Issue (8): 220-224.

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Web Service Discovery Model of Semantic and Trust QoS Based on Hadoop

HE Xiao-xia and TAN Liang   

  • Online:2018-11-14 Published:2018-11-14

Abstract: With the rapid growth of the Web service applications,how to select Web service meeting users’ QoS requirements more accurately is an emergent problem from many Web services with similar functions.There are two problems in the research work:one is the QoS quantitative problems of objectivity and accuracy,and the other is that the QoS match is also limited to the matching of numerical value and the lack of semantic description for quality of service.To solve the two problems,using the Hadoop distributed registration and service-seeking mode,we designed the Web service discovery model of semantic and trust QoS based on Hadoop.In the pattern,considering two aspects of QoS semantic match and numerical match,first,we used subjective and objective weighting mode to empower multi-dimension QoS properties,improving the objectivity and accuracy of QoS properties,and added credibility parameters to increase the trust of the Web service QoS attributes.Second,we extended the QoS ontology on the OWL-S to meet customer demand for the semantic matching of QoS.Experimental results show that this model can effectively solve the problems of query bottleneck and single point of failure,and accurately find Web services meeting the needs of users according to users’ QoS requirements.

Key words: Web service,Hadoop,Semantic,QoS ontology,QoS weights,Credibility

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