Modeling the use of spot instances for cost reduction in cloud computing adoption using a Petri net framework

Ribas, Maristella; Furtado, Corneli Gomes; Barroso, Giovanni Cordeiro; Lima, Alberto Sampaio; Souza, Neuman; Moura, António

doi:10.1109/inm.2015.7140507

Cited by 3 publications

(1 citation statement)

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“…Literature review: A common objective in previous work is to obtain the maximum resources utilization of a cloud-hosted application through auto-scaling [ 39 ], although a common mistake in many cloud projects comes from misconfiguration that often results in overprovisioning [ 40 ]. Reducing cost also has been explored; Aslanpour et al [ 41 ], for example, executed scale-down commands via a selection of virtual machines, decreasing the billing period in order to maximize the cost-efficiency. Other works use models to manage the trade-off between cost and performance together [ 42 ].…”

Section: Introductionmentioning

confidence: 99%

Performance-Cost Trade-Off in Auto-Scaling Mechanisms for Cloud Computing

Fé¹,

Matos²,

Dantas

et al. 2022

Sensors

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Cloud computing has been widely adopted over the years by practitioners and companies with a variety of requirements. With a strong economic appeal, cloud computing makes possible the idea of computing as a utility, in which computing resources can be consumed and paid for with the same convenience as electricity. One of the main characteristics of cloud as a service is elasticity supported by auto-scaling capabilities. The auto-scaling cloud mechanism allows adjusting resources to meet multiple demands dynamically. The elasticity service is best represented in critical web trading and transaction systems that must satisfy a certain service level agreement (SLA), such as maximum response time limits for different types of inbound requests. Nevertheless, existing cloud infrastructures maintained by different cloud enterprises often offer different cloud service costs for equivalent SLAs upon several factors. The factors might be contract types, VM types, auto-scaling configuration parameters, and incoming workload demand. Identifying a combination of parameters that results in SLA compliance directly in the system is often sophisticated, while the manual analysis is prone to errors due to the huge number of possibilities. This paper proposes the modeling of auto-scaling mechanisms in a typical cloud infrastructure using a stochastic Petri net (SPN) and the employment of a well-established adaptive search metaheuristic (GRASP) to discover critical trade-offs between performance and cost in cloud services.The proposed SPN models enable cloud designers to estimate the metrics of cloud services in accordance with each required SLA such as the best configuration, cost, system response time, and throughput.The auto-scaling SPN model was extensively validated with 95% confidence against a real test-bed scenario with 18.000 samples. A case-study of cloud services was used to investigate the viability of this method and to evaluate the adoptability of the proposed auto-scaling model in practice. On the other hand, the proposed optimization algorithm enables the identification of economic system configuration and parameterization to satisfy required SLA and budget constraints. The adoption of the metaheuristic GRASP approach and the modeling of auto-scaling mechanisms in this work can help search for the optimized-quality solution and operational management for cloud services in practice.

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