Improving Performance of P2P Systems Based on Topology Awareness

• Main Authors: Chen-chih Liao, 廖晨志
• Other Authors: Yen-Cheng Chen
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/28745191682707048575

碩士 === 國立暨南國際大學 === 資訊管理學系 === 95 === Peer-to-Peer systems have become popular over the past few years. These P2P systems form the overlay networks, which are logical and abstract networks built on top of the Internet. Essentially, peers randomly choose logical neighbors without any knowledge about underlying physical topology. This may cause a large amount of traffic in communication among peers, because of the mismatch of topology between the logical overlay network and the physical Internet. This topology mismatch problem may result in poor performance and scalability for Peer-to-Peer systems. A possible way to improve the performance of Peer-to-Peer systems is the construction of the overlay network based on the knowledge of the physical network topology. In this thesis, we will propose the use of the options “Record Route” and “Time Stamp” supported in IP to explore the physical path between peers. With the knowledge of physical topology, a peer could choose the nearest peer who has the files of interest. By the topology-aware peer selection, our approach outperforms traditional P2P systems by random peer selection. Our approach only incurs low overhead and can be deployed easily with any kind of P2P systems. Not only the achieved better performance, our approach also significantly reduces the overall traffic consumed by the P2P systems.