CASPER: Carbon-Aware Scheduling and Provisioning for Distributed Web Services
Paper i proceeding, 2023

There has been a significant societal push towards sustainable practices, including in computing. Modern interactive workloads such as geo-distributed web-services exhibit various spatiotemporal and performance flexibility, enabling the possibility to adapt the location, time, and intensity of processing to align with the availability of renewable and low-carbon energy. An example is a web application hosted across multiple cloud regions, each with varying carbon intensity based on their local electricity mix. Distributed load-balancing enables the exploitation of low-carbon energy through load migration across regions, reducing web applications carbon footprint. In this paper, we present CASPER, a carbon-aware scheduling and provisioning system that primarily minimizes the carbon footprint of distributed web services while also respecting their Service Level Objectives (SLO). We formulate CASPER as an multi-objective optimization problem that considers both the variable carbon intensity and latency constraints of the network. Our evaluation reveals the significant potential of CASPER in achieving substantial reductions in carbon emissions. Compared to baseline methods, CASPER demonstrates improvements of up to 70% with no latency performance degradation.

Computer systems organization

Cloud computing

Distributed architectures

Special purpose systems



Abel Souza

University of Massachusetts

Shruti Jasoria

University of Massachusetts

Basundhara Chakrabarty

University of Massachusetts

David Irwin

University of Massachusetts

Prashant Shenoy

University of Massachusetts

Alexander Bridgwater

Nätverk och System

Axel Lundberg

Student vid Chalmers

Filip Skogh

Nätverk och System

Ahmed Ali-Eldin Hassan

Nätverk och System

ACM International Conference Proceeding Series

Vol. 28 October 2023 67-73
979-840071669-0 (ISBN)

14th International Green and Sustainable Computing Conference, IGSC 2023
Toronto, Canada,


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