Design And Implementation Of A P2P-CDN Flow And Transmission Delay Simulator

Peer-to-Peer (P2P) systems are emerging as an important form of distributed computing with a strong emphasis on selforganization, decentralization and autonomy of the participating nodes. Peer-to-peer (P2P) computing or networking is a distributed application architecture that partitions tasks or work loads between peers. Peers are equally privileged, equipotent participants in the application. They are said to form a peer-to-peer network of nodes. Peers make a portion of their resources, such as processing power, disk storage or network bandwidth, directly available to other network participants, without the need for central coordination by servers or stable hosts.[1] Peers are both suppliers and consumers of resources, in contrast to the traditional client-server model where only servers supply, and clients consume.Self-organization, autonomy and decentralization allow for highly adaptive, robust and scalable networks making P2P simulator an increasingly interesting way to design distributed systems. Unfortunately it is still very difficult to develop P2P simulators due to the complex and ill understanding of interdependencies between the users, application, protocol and physical network. Furthermore, P2P and the content delivery network follow each other. This paper provides an overview of P2P protocols and a review of existing simulators. Based on the shortcomings of existing simulators a novel discrete event driven P2P simulator for P2P and content delivery networks is introduced and evaluated.