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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Book ChapterDOI
Pattern-Discovery-Based Response Time Prediction
TL;DR: This work summarizes the the patterns of response time and proposes a novel algorithm for predicting response time that can efficiently improve the accuracy of the prediction and compares it with other algorithms.
Proceedings ArticleDOI
HCLP Based Service Composition
Ying Guan,Aditya Ghose,Zheng Lu +2 more
TL;DR: This work shows how functional requirements and business process rules can be defined as hard constraints, QoS factors can be formulated as soft constraints and how the machinery associated with constraint hierarchies can be used to evaluate the alternative trade-offs involved in seeking to satisfy a set of QoS Factors that might pull in different directions.
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Novel recommendation system based on long‐term composition for adaptive web services
P Kirubanantham,G. Vijayakumar +1 more
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Quality of service in network-based automation
TL;DR: An outline of the QoS field in automation is given and its important features and research problems are discussed and a GPRS network measurement example is given.
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An approach to quality assessment for web service selection based on the analytic hierarchy process for cases of incomplete information
TL;DR: An improved AHP approach to consistency verification and the subsequent ordering for an incomplete judgment matrix is proposed, which can deal with situations where information is insufficient, and inherits all the merits of the traditional AHP approaches.
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.