Journal ArticleDOI
QoS issues in Web services
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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Dissertation
Überwachung und Steuerung dienstbasierter Architekturen : Verteilungsstrategien und deren Umsetzung
TL;DR: Die Uberwachungs- and Steuerungsfunktionen innerhalb eines verteilten and unternehmensubergreifenden Szenarios sollten aus Grunden der Skalierbarkeit, zur Gewahrleistung hoher Performanz and schneller Reaktion auf Anforderungsverletzungen sowie zur Abbildung der unterschied
Journal ArticleDOI
Using NearestGraph QoS Prediction Method for Service Recommendation in the Cloud
Yiqi Fu,Ding Ding,Seid Ahmed +2 more
TL;DR: A novel neighbor-based QoS prediction method is proposed for service recommendation, in which a concept and calculation method is put forward to describe the stable status of services and users with quantifiable QoS values, and a NearestGraph algorithm is further designed to recognize stable or unstable candidate along with their popularity by a nearest neighbor graph structure.
Measuring Availability of Mobile Web Services.
TL;DR: An Availability Checking Model (ACM) is presented, to determine the availability status of MWS by processing and referring to end-to-end service QoS parameters and introduces availability metrics to quantify service availability checking points.
Journal ArticleDOI
The Open System for Master Production Scheduling: Information Technology for Semantic Connections between Data and Mathematical Models
TL;DR: A flexible approach for MPS delivery as an alternative to packaged software is developed and a goal to standardize and speed the process of modeling in practice is fulfilled by creating a supply network for mathematical models that is searchable across the Internet with precision.
Proceedings ArticleDOI
Service composition execution optimization based on state transition matrix for cloud computing
TL;DR: A new QoS aware optimal service composition method that regards the cost averaged for one time of successful execution of a composite as its actual executing cost, and then selects the composite services with the aim of minimizing the composite service execution cost is proposed.
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.