AARC: Automated Affinity-aware Resource Configuration for Serverless Workflows

TL;DR

AARC is an automated framework that decouples CPU and memory resources in serverless computing, enabling more flexible, efficient, and cost-effective resource provisioning for complex workflows.

Contribution

It introduces a novel decoupled resource configuration approach with a graph-centric scheduler and priority configurator, improving efficiency over existing methods.

Findings

Achieves 85.8% and 89.6% reduction in search time.

Realizes 49.6% and 61.7% cost savings.

Maintains service level objective compliance.

Abstract

Serverless computing is increasingly adopted for its ability to manage complex, event-driven workloads without the need for infrastructure provisioning. However, traditional resource allocation in serverless platforms couples CPU and memory, which may not be optimal for all functions. Existing decoupling approaches, while offering some flexibility, are not designed to handle the vast configuration space and complexity of serverless workflows. In this paper, we propose AARC, an innovative, automated framework that decouples CPU and memory resources to provide more flexible and efficient provisioning for serverless workloads. AARC is composed of two key components: Graph-Centric Scheduler, which identifies critical paths in workflows, and Priority Configurator, which applies priority scheduling techniques to optimize resource allocation. Our experimental evaluation demonstrates that AARC achieves substantial improvements over state-of-the-art methods, with total search time reductions of 85.8% and 89.6%, and cost savings of 49.6% and 61.7%, respectively, while maintaining SLO compliance.