WS-SLA: A Framework for Web Services Oriented Service Level Agreements

Sun, Wei; Zhang, Jinyu; F, Liu

doi:10.1109/cscwd.2006.253114

Cited by 5 publications

(6 citation statements)

References 2 publications

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“…Running non-trivial examples 1000 times to obtain the empirical execution time distributions for the component services and the whole composition can take more than 2 hours, and changes in the network conditions during that time can introduce inaccuracies in the result. This 3 Note that "−" here is a data constructor, and not a subtraction sign. is practically unavoidable in a realistic WAN setting, such as the one used in our experimental setting.…”

Section: B Accounting For Network Variabilitymentioning

confidence: 99%

“…The distribution is specified as a list whose members have the form i − p i , where i ∈ Z is a feasible value, and p i ∈ (0, 1] is the probability Pr[X = i], such that ∑ i p i = 1. 3 The third argument to analyze is the list of the execution times for services S 1 and S 2 , in some suitable unit of measure. Finally, the fourth argument QoS stands for the distribution of the execution times of the composition, which is returned as the result after executing analyze/4.…”

Section: Implementation Notesmentioning

confidence: 99%

“…Several standards have been proposed for describing service QoS attributes and reasoning about them [9], [10]. The desirable and acceptable levels of QoS is usually specified in a Service Level Agreement (SLA) [3] between the service provider and consumer. Thus, the analysis of QoS is very important to both service consumers and providers, who have to ensure that QoS of the service does not violate the value given specified in SLA.…”

Section: Background and Related Work A Quality Of Servicementioning

confidence: 99%

“…Accordingly, engineering service-oriented systems which respect a given Service Level Agreement (SLA) [3] is hard. Different compositions can implement same functionality, but may, in principle, yield different Quality of Service (QoS) characteristics.…”

mentioning

confidence: 99%

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Towards QoS prediction based on composition structure analysis and probabilistic environment models

Ivanović

Kaowichakorn

Carro

2013

2013 5th International Workshop on Principles of Engineering Service-Oriented Systems (PESOS)

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Abstract-Complex software systems are usually built by composing numerous components, including external services. The quality of service (QoS) is essential for determining the usability of such systems, and depends both on the structure of the composition and on the QoS of its components. Since the QoS of each component is usually determined with uncertainty and varies from one invocation to another, the composite system also exhibits stochastic QoS behavior. We propose an approach for computing probability distributions of the composite system QoS attributes based on known probability distributions of the component QoS attributes and the composition structure. The approach is experimentally evaluated using a prototype analyzer tool and a real-world service-based example, by comparing the predicted probability distributions for the composition QoS with the actual distribution of QoS values from repeated actual executions.

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Section: B Accounting For Network Variabilitymentioning

confidence: 99%

Section: Implementation Notesmentioning

confidence: 99%

Section: Background and Related Work A Quality Of Servicementioning

confidence: 99%

mentioning

confidence: 99%

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Towards QoS prediction based on composition structure analysis and probabilistic environment models

Ivanović

Kaowichakorn

Carro

2013

2013 5th International Workshop on Principles of Engineering Service-Oriented Systems (PESOS)

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“…SLA é um vínculo formal que define a relação entre o provedor de serviço e o consumidor, geralmente envolvendo um terceiro componente 2.8. QUALIDADE DE SERVIÇOS (QOS) responsável pela garantia de contrato (Sun et al, 2006). Ele consiste de descrições de parceiros de negócio envolvidos, definições de serviço, parâmetros de qualidade de serviço, e possíveis penalidades em caso de ocorrência de falhas para atender os diferentes níveis de acordo.…”

Section: Qualidade De Serviços (Qos)unclassified

Estudo da influência da web services no desempenho de uma arquitetura orientada a serviços com QoS

Toyohara¹

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Agradeço primeiramente a Deus pela minha existência, pelas muitas oportunidades que surgem no meu caminho, e me conceder coragem e força para concluir mais uma etapa de minha vida. Agradeço a toda a minha família, em especial, aos meus pais, Augusto e Suely, e meus irmãos, Tsuyoshi e Pedro, por me apoiarem nesta jornada, me incentivando nos momentos difíceis. Eu tenho muito orgulho de vocês. Quero agradecer muito à minha orientadora profa. Dra. Sarita Mazzini pela sua orientação, pela motivação, e pelo apoio em momentos de decisão. Ao Prof. Dr. Júlio Cézar, que durante seu doutorado, idealizou a proposta deste trabalho de mestrado, e não mediu esforços para ajudar com ideias e sugestões que possibilitaram na realização deste projeto. Muito obrigado mesmo. Agradeço à Prof. Dra. Regina Santana que me auxiliou durante as etapas de avaliação de desempenho através de seus bons olhos com números e conselhos. Aos demais professores, tanto da UFMS, quanto do ICMC, que contribuiram com minha formação, em especial, Paulo Sérgio, Kalinka, Marcos, Monaco, Turine, Said, Debora e Sotoma. Agradeço também aos meus amigos de república Tereré: Mario, Diogo, Gondim, Alessandro, Alex e Patrick pela amizade, pelos momentos de alegria e pela companhia em uma nova jornada. Agradeço aos demais amigos de Campo Grande, pela parceria e amizade durante a graduação, Márcio, Jucimara, Maxwell, Kishi, Lucas, Ronaldo, Rafael, Letricia. Obrigado de coração! Muito obrigado para meus amigos do LasdPC e agregados, pelo apoio e pela hospitalidade na rep. Tibilisku nos momentos finais de conclusão da dissertação:

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Handbook of Service Description

Barros¹,

Oberle²

2012

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WS-SLA: A Framework for Web Services Oriented Service Level Agreements

Cited by 5 publications

References 2 publications

Towards QoS prediction based on composition structure analysis and probabilistic environment models

Towards QoS prediction based on composition structure analysis and probabilistic environment models

Estudo da influência da web services no desempenho de uma arquitetura orientada a serviços com QoS

Handbook of Service Description

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