SABER: An Infrastructure-Agnostic Benchmark Tool for Elasticity Evaluation on Cloud Foundry Based Platforms

Elasticity can be considered as one of the main features of cloud computing. It can be described as the ability to dynamically provision (or de-provision) resources to meet an application's demand. Cloud-native platforms support this feature, allowing applications to be vertically or horizontally scaled. However, evaluating the performance of elasticity in cloud-native platforms is not a trivial task. These platforms tend to focus on providing higher abstractions to their customers, which typically results in the absence of low-level metrics that are required for measuring and evaluating elasticity performance. Therefore, this paper presents SABER, an infrastructure-agnostic benchmark tool for elasticity evaluation of Cloud Foundry based platforms. SABER collects low-level metrics regarding elasticity typical procedures (e.g., allocation and de-allocation of resources) and can be used to evaluate elasticity on different cloud infrastructures. Furthermore, we present an evaluation of SABER running on Pivotal Application Service, a Cloud Foundry based platform provided by Pivotal Web Services.