International Journal of Electrical and Computer Engineering (IJECE) Vol. 13, No. 5, October 2023, pp. 5588~5598 ISSN: 2088-8708, DOI: 10.11591/ijece.v13i5.pp5588-5598  5588 Journal homepage: http://ijece.iaescore.com A novel cost-based replica server placement for optimal service quality in cloud-based content delivery network Priyanka Dharmapal 1 , Channakrishnaraju 2 , Chethan Bommalingaiahanapalya Krishnamurthy 3 1 Department of Computer Science and Engineering, Sri Siddhartha Academy of Higher Education University, Karnataka, India 2 Department of Computer Science and Engineering, Sri Siddhartha Institute of Technology, Karnataka, India 3 Department of Artificial Intelligence and Machine Learning, Vidyavardhaka College of Engineering, Visveswaraiah Technological University, Karnataka, India Article Info ABSTRACT Article history: Received Dec 10, 2022 Revised Apr 4, 2023 Accepted Apr 7, 2023 Replica server placement is one of the crucial concerns for a given geographic diversity associated with placement problems in content delivery network (CDN). After reviewing the existing literatures, it is noted that studies are more for solving placement problem in conventional CDN and not much over cloud-based CDN architectures, which some few studies are reported towards replica selection are much in its nascent stages of development. Moreover, such models are not benchmarked or practically assessed to prove its effectiveness. Hence, the proposed study introduces a novel design of computational framework associated with cloud-based CDN which can facilitate cost-effective replica server management for enhanced service delivery. Implemented using analytical research methodology, the simulated study outcome shows that proposed scheme offers reduced cost, reduced resource dependencies, reduced latency, and faster processing time in contrast to existing models of replica server placement. Keywords: Cloud Content delivery network Cost Replica server Resource This is an open access article under the CC BY-SA license. Corresponding Author: Priyanka Dharmapal Research Scholar, Department of Computer Science and Engineering, Sri Siddhartha Academy of Higher Education University Tumkur, Karnataka-572017, India Email: prsh2019@gmail.com 1. INTRODUCTION With the rising demands of data and service availability, there is a need of an effective networking technology that assists in the offering the seamless services irrespective of traffic condition in dedicated manner. A content delivery network (CDN) is one such technology that assists in delivering the content efficiently and quickly using surrogate server and content placement [1]–[5]. Although, there are several reported advantage of adopting CDN system towards facilitating rate of data delivery, it is characterized by various challenging condition too [6]. The primary challenge in deployment of CDN is its inclusion of large sum of money with highly sophisticated process of deployment [7]. On the basis of multiple studies, it has been noted that enabling technologies of CDN in current times make use of cloud computing more [8]. This adoption offers beneficial characteristic of service provisioning, resource allocation, pay-as-per usage, and hosting service supportability [9]. It should be noted that in the complete operation of CDN, the role of replica server is highly important which is actually responsible for replicating the original content to content replica server. Irrespective of various approaches being carried out towards content placement algorithm, there are still a large trade-off between the demands of the user and the present state of operation of replica server. The primary issue associated with the placement of replica server is associated with the optimization problem,