Evaluating the Scalability and Elasticity of Function as a Service Platform
Kim Long Ngo, Joydeep Mukherjee, Zhen Ming Jiang, Marin Litoiu · 2022
Function as a Service (FaaS) is a new software technology with promising features such as automated resource management and auto-scaling. Since these operational aspects are transparent, software engineers may not fully understand the scaling characteristics as well as limitations of this technology and this lack of information can lead to undesired performance results. To address these concerns, we perform a study to characterize FaaS' scalability with intensive workloads on three popular FaaS cloud platforms, namely Amazon AWS Lambda, IBM and Azure Cloud Function. We also study a workload smoother design pattern to examine if it enhances FaaS overall performance. The results show that different FaaS platforms adopt distinct scaling strategies and by applying a workload smoother, software engineers can achieve 99 - 100% success rates compared to 60 - 80% when FaaS' system is saturated.