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
QoS-aware service composition for cloud manufacturing based on the optimal construction of synergistic elementary service groups
Bo Liu,Zili Zhang +1 more
TL;DR: To deal with the increasing computing complexity of the optimization model, an algorithm named matrix-coded genetic algorithm with collaboratively evolutional populations (MCGA-CEP) is designed in the current study and results indicate that the proposed SESG-SC approach significantly outperforms the previous approaches, and the proposed MCGA- CEP is sound on performance-wise.
Book ChapterDOI
QoS-Aware composition of web services: an evaluation of selection algorithms
TL;DR: This paper discusses how the selection can consider different Quality-of-Service (QoS) categories as selection criteria to select the most suitable candidates for the composition.
Journal ArticleDOI
Cloud-based cyber-physical systems and quality of services
TL;DR: The findings of this review indicate that the combination of the key enabling techniques presented in the CBCPS will lead to a new manufacturing paradigm capable of facing the new challenges and trends.
Journal ArticleDOI
A Spatial-Temporal QoS Prediction Approach for Time-aware Web Service Recommendation
TL;DR: This work proposes a novel spatial-temporal QoS prediction approach for time-aware Web service recommendation, where a sparse representation is employed to model QoS variations, and uses the geo-location of web service to effectively select the nearest neighbor for the sparse representation of temporal QoS values.
Journal ArticleDOI
QCWS: an implementation of QoS-capable multimedia Web services
Hongan Chen,Tao Yu,Kwei-Jay Lin +2 more
TL;DR: A QoS-capable Web service architecture, QCWS, is proposed by deploying a QoS broker between Web service clients and providers, enhanced with simple QoS capabilities.
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
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