Chapter 9CDN Modeling
Tolga Bekta
1 and Ozgur Ercetin1
1University of Southampton, Highfield, Southampton, UK
2Sabancı University, 
stanbul, Turkey
9.1 Introduction
Effective and efficient use of resources available to a content delivery network (CDN) has never been so relevant, particularly in the light of the ever-increasing amount of content that has to be distributed on a network with limited resources, including bandwidth and storage space. Indeed, Cisco systems predict that global Internet Protocol (IP) traffic will reach 1.3 zettabytes (
) annually, implying a fourfold growth from 2011 to 2016 [1]. Moreover, stringent requirements on quality-of-service (QoS) mechanisms and the necessities for CDN operators to compete in the market require optimal decisions to be made around guaranteed service levels and pricing.
The aim of this chapter is to describe and detail some of the fundamental problems arising in CDNs relevant to the optimization of resource management, allocation, and pricing. This chapter also includes related problems arising in video-on-demand (VoD) content delivery and looks at such problems from an optimization perspective. The chapter adopts a tutorial style, as ...
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