Energy Consumption in Peer-Assisted CDN

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Mohamad Dikshie Fauzie
Achmad Husni Thamrin, Jun Murai


Many CDN companies utilize peer-to-peer to scale content delivery services and save bandwidth, but the energy consumption in a peer-assisted CDN is not well understood.This paper presents an analysis of energy consumption in a peer-assisted CDN system, where an ISP manages its own CDN and its users participate in a P2P network to assist content delivery, by looking into two types of services: live streaming and online storage. We developed a simple energy consumption model for peer-assisted CDN based on the empirical energy required for devices and the fact that data centers require cooling overhead and peers do not. For the live streaming service, we found that delegating workloads to peers can save up to 11% of the energy in the data center compared to the pure CDN architecture, while the savings in the total energy consumption of the system is less than 1%. For the peer-assisted online storage, we looked into several server bandwidth allocation strategies for peers of a peer-assisted online storage service and in the best case found that the energy savings of the data center and of the system are 21% and less than 2%, respectively.


Keywords:P2P, CDN, Energy, Power


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