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Study On Key Technologies In P2P-based Wide-area Network Content Distribution System

Posted on:2004-04-05Degree:MasterType:Thesis
Country:ChinaCandidate:C F XuFull Text:PDF
GTID:2168360152457115Subject:Computer Science and Technology
Abstract/Summary:PDF Full Text Request
With the development of network technology, Internet has become the most important content distribution system in the information society, but the traditional server-centric content distribution mode is also confronted with performance bottleneck. At the same time, P2P computing as a new mode of utlizing distributed computing resources comes into being. It is different from Client/Server computing, commonly there is no special server in P2P network and nodes can communicate and collaborate directly with each other. P2P computing can utilize increasingly unused resources in the edge of the Internet. Content distribution and sharing is one of the main applications of P2P computing, P2P-based content distribution system can fully utilize resources of vast clients and lighten the load of application server. This thesis is in the context of the building of CCERT content distribution Website for CERNET, it aims at making four major contributions:Firstly, the thesis analyses the resource locating algorithm of structured P2P system, namely DHT algorithm. Resource locating algorithm is the core of P2P system, the thesis introduces four typical DHT algorithms: Chord, CAN, Pastry and Tapestry, and it also makes some comparisons and discussions about them.Secondly, the thesis presents a DHT-based hierarchical resource locating model (DHRLM). DHRLM introduces sub-net partition and hierarchy into structured P2P network, not only it inherits original strongpoints of DHT, but also it achieves better scalability, manageability and flexibility. The thesis theoretically analyses the main performance of DHRLM and implements its simulation based on Chord simulator.Thirdly, the thesis designs a P2P-based Wide Area Network content distribution system. The thesis gives a general design of the system and summarizes its key technologies.The final contribution of the thesis is the design and implementation of an archetypal system which is called FastNet for distribution of security-related content. FastNet takes DHRLM as routing model, it implements a diffluent multi-point distribution algorithm like Bittorrent, but FastNet is different from Bittorrent which is an unstructured P2P system, it implements the idea according to the characteristics of resource locating algorithm in structured P2P network. Moreover FastNet adopts periodic fault-tolerant algorithm to ensure active, quick and reliable distribution of security-related content.
Keywords/Search Tags:Peer-to-Peer computing, resource locating, distributed hash table, hierarchy, content distribution
PDF Full Text Request
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