DOI: 10.4018/IJCAC.2018070106 International Journal of Cloud Applications and Computing Volume 8 • Issue 3 • July-September 2018 Copyright © 2018, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. 78 Cost Efective Approaches for Content Placement in Cloud CDN Using Dynamic Content Delivery Model S. Sajitha Banu, National Institute of Technology, Tiruchirappalli, India S.R. Balasundaram, National Institute of Technology, Tiruchirappalli, India ABSTRACT Cloud providers give storage access and efficient content placement and delivery services to content providers by optimizing cloud-based content delivery. The cost-efficient model should not only consider the content delivery cost but also the storage cost associated with the cloud network. In this article, a novel cloud-based content delivery model is proposed that uses shared storage models for cost optimization in content delivery. Shared storages are placed in different areas of the content delivery network and an efficient replica placement strategy is employed using optimization techniques. Different content delivery schemes are used in proposed model for different situations and overall content delivery cost is optimized. Experimental results show better performance and lesser cost in terms of storage, traffic and latency and also satisfy Quality-of-Service (QoS) and Quality-of- Experience (QoE) in content delivery using PSO when compared to ACO and GA. KEywoRDS Ant Colony Optimization Algorithm, Cloud Computing, Content Delivery, Genetic Algorithm, Particle Swarm Optimization Algorithm, Shared Storage 1. INTRoDUCTIoN Content providers aim to seamlessly deliver their contents to their intended customers or end users and for this purpose, the Content Delivery Networks (CDN) have been (Wang et al., 2015). The traditional CDNs that are existing now can be too expensive for small to medium-sized content providers (Salahuddin et al., 2017). Also, creating a CDN for self and maintaining the storage and content delivery process by a content provider is an even more challenging and costly task that not many content providers can handle or afford. The maintenance of the servers and the storages within the CDN are cost expensive and suitable resources is required (Stocker et al., 2017). To make things easier for the content providers, cloud- based content placement storage and cloud-based content delivery mechanisms provide an alternate and much cheaper solution (Zhang et al., 2015). Cloud-based content delivery provides faster, cheaper and on-demand content delivery to the end users using the cloud computing concept (Ouf et al., 2015). For handling large amounts data such as a large number of web contents, cloud resources can be used that can handle big data easily (Bagui et al., 2015). Cloud based Content Delivery Network (CCDN) has been a major research focus on recent times (Gkatzikis et al., 2017) and the focus is more on optimization of content placement with lesser resource usage and optimization of content delivery for less delivery cost (Xu et al., 2017). The metric that defines the resource usage in CCDN is the amount of storage consumed within the cloud. In