Journal ArticleDOI
QoS issues in Web services
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TLDR
QoS measures can include the maximum throughput or a function that describes how throughput varies with load intensity, which can be measured in terms of arrival rates (such as requests per second) or number of concurrent requests.Abstract:
Quality of service (QoS) is a combination of several qualities or properties of a service, such as: availability is the percentage of time that a service is operating; security properties include the existence and type of authentication mechanisms the service offers, confidentiality and data integrity of messages exchanged, nonrepudiation of requests or messages, and resilience to denial-of-service attacks; response time is the time a service takes to respond to various types of requests; Response time is a function of load intensity, which can be measured in terms of arrival rates (such as requests per second) or number of concurrent requests. QoS takes into account not only the average response time, but also the percentile of the response time; and throughput is the rate at which a service can process requests. QoS measures can include the maximum throughput or a function that describes how throughput varies with load intensity. The QoS measure is observed by Web services users. These users are not human beings but programs that send requests for services to Web service providers. QoS issues in Web services have to be evaluated from the perspective of the providers of Web services and from the perspective of the users of these services.read more
Citations
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Journal ArticleDOI
Bounding models families for performance evaluation in composite Web services
TL;DR: This work proposes methods to automatically derive from the original model a family of bounding models for the composite Web response time, allowing to find the appropriate trade-off between accuracy of the bounds and the computational complexity.
Journal Article
Web service selection using quality criteria and trust based routing protocol
TL;DR: A new algorithm for effective construction of the primitive services according to their quality criteria is introduced and a trust based ranking algorithm is employed to diminish the service with lower qualities.
Service selection and ranking in cross-organizational business process collaboration
TL;DR: In this paper, acknowledgements and acknowledgements are given for the work presented in this article. ___________________________________________ v Acknowledgements........................................................ ___________________________________________________________ viii
Dissertation
Cross-organizational Service-based Workflows - Solution Strategies for Quality of Service Optimization
TL;DR: This thesis provides several contributions to the QoS optimization of service-based workflows from the intermediary's point of view, including a resource planning optimization model, solved by mathematical optimization with an exact solution as well as by the application of the developed heuristics.
Combining User Feedback and Monitoring Data to Support Evidence-based Software Evolution
TL;DR: The next generation of managers will have to consider the role of external third-party experts in the development of software products and how they can help improve the quality of their products.
References
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Journal ArticleDOI
Unraveling the Web services web: an introduction to SOAP, WSDL, and UDDI
Francisco Curbera,Matthew J. Duftler,Rania Khalaf,William A. Nagy,Nirmal K. Mukhi,Sanjiva Weerawarana +5 more
TL;DR: This tutorial explores the most salient and stable specifications in each of the three major areas of the emerging Web services framework, which are the simple object access protocol, the Web Services Description Language and the Universal Description, Discovery, and Integration directory.
Journal ArticleDOI
Session-based admission control: a mechanism for peak load management of commercial Web sites
Ludmila Cherkasova,P. Phaal +1 more
TL;DR: It is shown that a Web server augmented with the admission control mechanism is able to provide a fair guarantee of completion, for any accepted session, independent of a session length, which is a critical requirement for any e-business.