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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Learning Optimal Web Service Selections in Dynamic Environments when Many Quality-of-Service Criteria Matter
TL;DR: To achieve QoS-aware service selection, a Multi-Criteria Randomized Reinforcement Learning approach (MCRRL) is relied on and authorizes automated continuous optimization of service monitoring and leads the system to respond to the variation of the availability of web services without human involvement.
Seleção de serviços sensível à QoS e à capacidade para implantação eficiente de múltiplas coreografias de serviços
TL;DR: In this paper, a model for representacao combinada of multiplas coreografias is presented, e proposto a funcao de utilidade for avaliar a QoS, juntamente com a extensao do algoritmo de emparelhamento.
Journal ArticleDOI
Providing Web Services over DVB-H: Mobile Virtual Web Services
Ana Fernández Vilas,Rebeca P. Díaz Redondo,José J. Pazos Arias,Manuel Ramos Cabrer,M.R. Lopez +4 more
TL;DR: This paper introduces the experiences in accessing Web services (WSs) from DVB-H terminals and proposes how to broadcast the simple clients and the information needed to access the virtual WS by using the technology provided by the DVb-H network.
Proceedings ArticleDOI
Web service selection based on TOPSIS algorithm
TL;DR: This paper proposes an extension of the conventional architecture of SOA Web services, taking into account the different non-functional quality of service (QoS) criteria in the discovery and selection of the best services.
Journal ArticleDOI
A Collaborative QoS-Aware Service Evaluation Method for Service Selection
Cong Gao,Jianfeng Ma +1 more
TL;DR: This paper proposes in this paper a collaborative QoS-aware service evaluation method which is based on the Analytical Hierarchy Process (AHP) theory, and the service with the highest benefit to cost ratio among candidate services is selected through the aggregation of the collected QoS information.
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.