Int J Performability Eng ›› 2026, Vol. 22 ›› Issue (8): 473-484.doi: 10.23940/ijpe.26.08.p5.473484

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Energy-Efficient VM Placement and Replacement through a Hybrid MBFD Q-Learning Framework for Dynamic VM Consolidation

Rainu Nandala, Kiran Moara,*, Rashmi Sindhub, Vipin Kumara, and Kamaldeep Joshia   

  1. aUniversity Institute of Engineering & Technology (UIET MDU) M. D. University-Rohtak, Haryana, India;
    bPanipat Institute of Engineering & Technology, Haryana, India
  • Submitted on ; Revised on ; Accepted on
  • Contact: *E-mail address: kiran.rs@mdurohtak.ac.in

Abstract: Energy-efficient virtual machine (VM) consolidation is an important part of cloud data center operational overhead reduction. This paper investigates the use of a hybrid consolidation framework based on the Modified Best Fit Decreasing (MBFD) algorithm for initial VM placement and a Q-learning based decision model for dynamic VM reallocation. A combination of the Q-learning and the dual-threshold policy is used to select migration actions based on system states, which include CPU load, power characteristics, and parameters that are related to SLA. A thorough experimental analysis is performed in the MATLAB environment in various workload situations, where the proposed technique is compared to well-established algorithms such as E-ABC, OGrA+OFr and DA-MBFD. The performance trends are analyzed in terms of energy consumption, violations of SLA, number of migrations and utilization of hosts. The results offer a detailed comparison of the behavior of Q-learning-based consolidation as compared to heuristic and metaheuristic strategies, which provides insights into energy-aware resource management in the cloud environment.

Key words: virtual machine (VM), physical machine (PM), cloud computing (CC), modified best fit decreasing (MBFD), service level agreement (SLA), cloud computing data center (CCDC)