Optimising Resource Consumption and Reducing Power Usage in datacentres: A Mathematical VM Replacement Model and Efficient Algorithm

Abstract

This study addresses the issue of power consumption in virtualized cloud datacentres by proposing a VM replacement model and an efficient algorithm. The model incorporates multi-objective functions, aiming to optimise VM selection based on weight and minimise resource utilisation disparities across hosts. Constraints are included to maintain balanced CPU, memory, and network bandwidth usage. The proposed algorithm offers a fast solution with minimal VM replacements. Experimental results in a simulation environment demonstrate significant reductions in power consumption compared to alternative models. The proposed model and algorithm are successfully implemented and operated within a real-world cloud infrastructure, emphasising their practicality.