Cost Reduction through SLA-driven Self-Management

Abstract

Abstract-A main challenge for service providers is managing service-level agreements (SLAs) with their customers while satisfying their business objectives, such as maximizing profits. Most current systems fail to consider business objectives and thus to provide a complete SLA management solution. This work proposes an SLA-driven management solution that aims to maximize the provider's profit by reducing resource costs as well as fines owning to SLA violations. Specifically, this work proposes a framework that comprises multiple, configurable control loops and supports automatically adjusting service configurations and resource usage in order to maintain SLAs in the most costeffective way. The framework targets services implemented on top of large-scale distributed infrastructures, such as clouds. Experimental results demonstrate its effectiveness in maintaining SLAs while reducing provider costs.

An Integrated Approach for Specifying and Enforcing SLAs for Cloud Services

“…The approach is validated by the Qu4DS framework [8] which supports the development and management of cloud services on distributed infrastructures. A case study was used to evaluate the impact of faults on the provider profit.…”

“…We use the Qu4DS (Quality Assurance for Distributed Services) framework [8] to validate the approach proposed in this paper. Qu4DS is a research prototype for supporting the development and management of cloud services.…”

“…In Section IV, we present two QoS assurance mechanisms which ensure performance and fault-tolerance QoS along with the translation of QoS to low-level mechanism configurations. Section V explains how the Qu4DS framework [8] is used as proof of concept for our approach. Qu4DS provides automatic SLA management functionalities which include service negotiation, resource booking, instantiation, billing, SLA translation, and QoS assurance in a transparent fashion.…”

Quality of service approaches in cloud computing: A systematic mapping study

“…The study also evaluated the effect of SLA failures on the service provider profit. Freitas et al [96] proposed an SLA management model to maximise a service provider's profits by reducing the costs of resources and applying fines for SLA violations. The framework automatically adjusts service configurations and resource usage in order to maintain SLAs in the most costeffective way.…”

Cross - layer monitoring and adaptation of multi - cloud service - based applications

“…In the literature many cost-optimization techniques have been proposed, aiming at minimizing the cost of enacting adaptation actions. In [Freitas et al 2011] the authors propose Qu4DS framework, which aims at increasing the provider profit by dynamically managing services and resources, taking into account SLA prices, fines, and infrastructure costs. In our approach we are inspired by the work presented in [Leitner et al 2013], which formalizes the problem of finding the optimal set of adaptations, taking into account the minimization of the total costs of SLA violations and the adaptations to prevent them.…”