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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A Novel Approach for Multiple Resource Allocation In WWW
TL;DR: A method for trusted resource allocation in which all the web site objects are viewed as resources, and they are allocated to those who have the access rights, depends on the availability of resources.
Proceedings ArticleDOI
Parallel Web server load balancing technology of cloud computing environments
Kang Yang,Xiao Song,Xiang Li +2 more
TL;DR: This paper designs a load balancing system based on three layer structure and experimental results show its superiority in terms of load balancing.
Book ChapterDOI
A feature-oriented WSDL extension for describing grid services
TL;DR: WSDL specification is extended to contain useful description of both functional and non-functional characteristics by mean Design by Contract technique, so Grid users can specify their QoS expectations and select suitable resources and use them for their Grid workflow at design time before its execution on the Grid.
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.