Topic
Service-level agreement
About: Service-level agreement is a research topic. Over the lifetime, 4358 publications have been published within this topic receiving 75333 citations. The topic is also known as: SLA.
Papers published on a yearly basis
Papers
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TL;DR: This work jointly investigates the load distribution and placement of IoT applications to minimize Service Level Agreement violations and proposes a multi-objective genetic algorithm with the initial population based on random and heuristic solutions to obtain near-optimal solutions.
25 citations
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24 Oct 2011TL;DR: This paper evaluates the probability distribution of economical losses associated to service failures under a Markovian ON-OFF service model, and shows that the Value-at-Risk (VaR) provides an accurate view of the risk incurred by the service provider, and allows to differentiate compensation policies, even when they lead to equal average losses.
Abstract: Service Level Agreements define the obligations of service providers towards their customers. One of such obligations is the compensation that customers receive in the case of service degradation or interruption. This obligation exposes the service provider to the risk of paying large amounts of money in the case of massive disruptions. The evaluation of such risk is preliminary to any countermeasure the service provider may wish to take to mitigate the risk. In this paper we evaluate the probability distribution of economical losses associated to service failures under a Markovian ON-OFF service model. We provide expressions for such distributions under three compensation policies, linked respectively to the number of failures, the number of outages lasting more than a prescribed threshold, and the cumulative downtime over a finite time horizon. In order to provide a single measure of risk, we compute the Value-at-Risk (VaR) for those compensation policies. We show that the VaR provides an accurate view of the risk incurred by the service provider, and allows to differentiate compensation policies, even when they lead to equal average losses.
25 citations
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18 Feb 2004
TL;DR: A service level agreement may be imposed by a service provider such as an Internet service provider, that may include, e.g., a volume limitation and a bandwidth limitation as discussed by the authors.
Abstract: A service level agreement may be imposed by a service provider, such as an Internet service provider, that may include, e.g., a volume limitation and a bandwidth limitation. One or more limitations of the service level agreement may be enforced or modified in response to a triggering event. For example, a bandwidth limitation on a network subscriber may be enforced or modified based on how much data is consumed by the subscriber.
25 citations
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13 Dec 2010TL;DR: The European project OPTIMIS is focussing on optimisation of cloud infrastructure services meeting demands from service providers, e.g. when public and private Clouds are federated in different configurations.
Abstract: Current Cloud environments are offered to their customers in a best effort approach. Instead of guarantees a statistical uptime expectation is communicated to the user with minimal compensations in case of unexpected downtime. In contrast, a service provider intending e.g. to extend his own resources dynamically with Cloud resources in case of peak demands of his customers needs a reliable Service Level Agreement with the Cloud infrastructure provider. This Service Level Agreement must cover aspects like cost, security, legal requirements for data-placement, eco-efficiency and more. The European project OPTIMIS is focussing on optimisation of cloud infrastructure services meeting demands from service providers, e.g. when public and private Clouds are federated in different configurations. This paper describes the approach of OPTIMIS for negotiating and creating Service Level Agreements between infrastructure providers and service providers.
25 citations
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28 Dec 2006TL;DR: In this paper, an approach for allocating resources relating to completion of a workflow within a service level agreement (SLA) defined for that instance is provided for the purpose of video processing.
Abstract: An approach is provided for allocating resources relating to completion of a workflow within, for example, a service level agreement (SLA) defined for that instance. An activity related to video processing is detected. An attribute associated with the activity is determined. A portion of shared resources are allocated for the activity based on the determined attribute.
25 citations