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Quality of service (QoS) in Web serv...

Yu, Tao.

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Quality of service (QoS) in Web services: Model, architecture and algorithms.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Quality of service (QoS) in Web services: Model, architecture and algorithms./
作者:	Yu, Tao.
面頁冊數:	153 p.
附註:	Source: Dissertation Abstracts International, Volume: 67-07, Section: B, page: 3924.
Contained By:	Dissertation Abstracts International67-07B.
標題:	Computer Science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3225057
ISBN:	9780542790270

Quality of service (QoS) in Web services: Model, architecture and algorithms.
Yu, Tao.

Quality of service (QoS) in Web services: Model, architecture and algorithms. - 153 p.

Source: Dissertation Abstracts International, Volume: 67-07, Section: B, page: 3924.

Thesis (Ph.D.)--University of California, Irvine, 2006.

Web services for Service-Oriented Architecture (SOA) provide a flexible and scalable framework for service composition. Using standard-based protocols (SOAP and WSDL), composite services can be constructed by integrating atomic services developed independently to form complex business processes and workflows. The runtime performance of a composite service is important for most distributed applications with practical significance. The end-to-end performance management is a big challenge for distributed SOA systems due to the flexible and compositional nature of Web services.

ISBN: 9780542790270Subjects--Topical Terms:

626642
Computer Science.

Quality of service (QoS) in Web services: Model, architecture and algorithms.
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245 1 0 $a Quality of service (QoS) in Web services: Model, architecture and algorithms.
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502 $a Thesis (Ph.D.)--University of California, Irvine, 2006.
520 $a Web services for Service-Oriented Architecture (SOA) provide a flexible and scalable framework for service composition. Using standard-based protocols (SOAP and WSDL), composite services can be constructed by integrating atomic services developed independently to form complex business processes and workflows. The runtime performance of a composite service is important for most distributed applications with practical significance. The end-to-end performance management is a big challenge for distributed SOA systems due to the flexible and compositional nature of Web services.
520 $a In this dissertation, we design a broker-based architecture QBroker to provide efficient QoS management for service-oriented distributed system. The main functions of QBroker include service tracking, planning, selection and adaptation. In QBroker, Web service composition with end-to-end QoS assurance includes two steps: service planning and QoS service selection. The efficiency of service selection decides the run-time performance of a QBroker. We design several service selection algorithms for composite services with different composition structures and different number of QoS constraints. The algorithms define the selection problem in two ways: combinatorial model, by modeling the problem as various knapsack problems and graph model, by modeling the problem as multi-constrained optimal path problem. The objective of service selection is to maximize an application specific utility function under the end-to-end QoS constraints. The performances of the algorithms have been studied by extensive simulations. The algorithms are efficient for both offline planning and making online decisions.
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