A Framework for Consumer-Centric SLA Management of Cloud-Hosted Databases
Service Level Agreements (SLA) represent the con-tract which captures the agreed upon guarantees between a service provider and its customers. The speciﬁcations of existing service level agreements (SLA) for cloud services are not designed to ﬂexibly handle even relatively straightforward performance and technical requirements of consumer applications. In this article, we present a novel approach for SLA-based management of cloud-hosted databases from the consumer perspective. We present an end-to-end framework for consumer-centric SLA man-agement of cloud-hosted databases. The framework facilitates adaptive and dynamic provisioning of the database tier of the software applications based on application-deﬁned policies for satisfying their own SLA performance requirements, avoiding the cost of any SLA violation and controlling the monetary cost of the allocated computing resources. In this framework, the SLA of the consumer applications are declaratively deﬁned in terms of goals which are subjected to a number of constraints that are speciﬁc to the application requirements. The framework continuously monitors the application-deﬁned SLA and automatically triggers the execution of necessary corrective actions (scaling out/in the database tier) when required.
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