Journal ArticleDOI
QoS issues in Web services
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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
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Dissertation
La sélection des services web dans une composition à base de critères non fonctionnels.
TL;DR: The experimental results show that the hybridization of metaheuristics with the fuzzy domination and the skyline outperform the standard versions of the QoSWSC problem and are considered as a multiobjective optimization problem.
Agent-based QoS management for web service compositions
TL;DR: In this article, the authors propose a method to solve the problem of "uniformity" and "uncertainty" in the context of health care, and propose a solution.
Journal Article
A Dynamic Priority Allocation Scheme of Messages for Differentiated Web Services Satisfying Service Level Agreement.
TL;DR: This research analyzes the appropriate quality factor for the quality level where differentiated service is provided and suggests a method for assigning priorities to web service message processing processes based on these quality factors.
Dissertation
An Integrated Framework for Ensuring Runtime Quality in Service-Oriented Systems
TL;DR: An integrated quality assurance framework is presented, which combines quality assurance approaches from the service description and selection, service monitoring, service negotiation, and reputation system domains, and is illustrated with a series of service-oriented experiments, which evaluate the role of the framework in the system quality assurance process.
Journal ArticleDOI
Concepts and Derivatives of Web Services
Atieh Khanjani,Wan Nurhayati +1 more
TL;DR: The paper reviews the literature of web services with respect to quality of service (QoS) or non- functional properties, to acquire better understanding of concepts and issues related to QoS web service select- ing and discovering processes.
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.