Journal ArticleDOI
QoS issues in Web services
Reads0
Chats0
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
More filters
Dissertation
Flexible Quality of Service Management of Web Services Orchestrations
TL;DR: In this paper, a probabilistic multi-dimensional QoS model for web services is presented, where data dependency is involved in orchestrations and conditions to ensure monotonicity are necessary and are incorporated.
Improving Web Service Selection using Fuzzy Quality of Protection
TL;DR: Quality of protection parameterized tasks that are given to fuzzier where the input values for decision making are converted into the range between 0 and 1 for selection and choice of the most appropriate web service with respect to quality of protection.
Proceedings ArticleDOI
Aspect-oriented programming in the development of service-levels controllers of cloud applications
TL;DR: An approach to the use of aspect-oriented programming (AOP) in the development of service-levels controllers of cloud applications is investigated, arguing that delivering service levels of a cloud application needs a feedback control system.
Proceedings ArticleDOI
A Research of Distributed Security and QoS Testing Framework
TL;DR: It is put forward the necessity that some security tests should be closely combined with quality of service testing, and the basic methods of distributed denial of service attack and defense are discussed.
Proceedings ArticleDOI
Grid Service Three-step Matching Model Based on Ontology
TL;DR: This paper first proposes a template to describe the grid service fully and extend the WSDL specification, and presents the accuracy degree function of service matching based on ontology to match the service in three-step.
References
More filters
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.