Journal ArticleDOI
QoS issues in Web services
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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
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Dissertation
Extending Service Oriented Architecture Using Generic Service Representatives
TL;DR: A domain independent computational model of enterprise agents in SOA to support a wide variety of client-processing tasks and extensions of the SOA architecture by adding novel real-time and event-triggered web services are proposed.
Journal ArticleDOI
Calidad en datos geográficos, geoservicios y productores de datos: análisis crítico
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A Large-Scale Device Collaboration Performance Evaluation Approach Based-on Dynamics
TL;DR: A dynamics model of the large-scale device collaboration performance evaluation is defined, an evaluation approach is provided and an application example is given to demonstrate the usage of this approach.
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How High Should We Go? Determining Reservation Values to Negotiate Successfully for Composite Software Services
TL;DR: This work presents a methodology that determines the reservation values a user (or broker) should use for each component service based on the user’s minimum requirements for the composite servic...
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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.