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
Improving component selection and monitoring with controlled experimentation and automated measurements
Christoph Becker,Andreas Rauber +1 more
TL;DR: How an evidence-based approach to component evaluation can improve repeatability and reproducibility of component selection under the following conditions: Functional homogeneity of candidate components and high number of components and selection problem instances is described.
Book ChapterDOI
Guiding Architectural Decision Making on Quality Aspects in Microservice APIs
TL;DR: In this paper, a qualitative, in-depth study of 31 widely used APIs plus 24 API specifications, standards, and technologies is reported on, finding that a substantial uncertainty reduction can be potentially achieved by applying the model modelled.
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Just-in-time knowledge management
Larry Kerschberg,Hanjo Jeong +1 more
TL;DR: A JIT-KM architecture is presented consisting of user, middleware and data services to search for information from heterogeneous sources, and to rank and deliver this to decision-makers.
Proceedings ArticleDOI
Dealing with Quality Tradeoffs during Service Selection
TL;DR: This work outlines and test a selection approach that accommodates priorities and that is based on available multi criteria decision making techniques and demonstrates its utility in the service selection process.
Book ChapterDOI
QoS-aware web services composition using transactional composition operator
An Liu,Liusheng Huang,Qing Li +2 more
TL;DR: A composition model is proposed to evaluate the quality of service (QoS) of a composite service with various transactional requirements, based on a transactional composition operator, which extends the traditional workflow patterns and integrates transactional properties.
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.
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Ludmila Cherkasova,P. Phaal +1 more
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