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Exploring PSI Peer Search Infrastructure: Introduction to P2P Networks

Learn about peer-to-peer systems and applications, the PSI architecture, hybrid approaches, and future work in P2P network development. Discover the evolution of P2P models and the advantages of decentralized connectivity.

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Exploring PSI Peer Search Infrastructure: Introduction to P2P Networks

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Presentation Transcript

  1. PSIPeer Search Infrastructure

  2. Introduction • What are P2P Networks? The term "peer-to-peer" refers to a class of systems and applications that employ distributed resources to perform a critical function in a decentralized manner. “A network of SERVENTS (SERVers+cliENTS)”

  3. Existing P2P Models Existing P2P Models Document Routing Centralized Index Flooded Requests Napster Freenet Gnutella

  4. Objectives • Improving Peer Search • Enabling better connectivity

  5. Why a hybrid approach? Combine the advantages of centralized and distributed approaches: • Centralized systems better suited for security • Have better search capability • All peers are not equal • Scalability limitations of centralized systems • Single point of failure

  6. PSI Entities • Peers • Lookup Servers • Intelligent Peer Locators (IPLs)

  7. The PSI Architecture I Lookup Server IPL Peers Lookup Server Peers Lookup Server IPL

  8. The PSI Architecture II Lookup Server IPL Peers Lookup Server Peers Lookup Server IPL

  9. The PSI Model • Peer Search Algorithm • Preference Calculation functions • Load Balancing the lookup servers • Web services

  10. Implementation • Sample application ShareBaby (Napster) • VC# .NET • Enhance to make distributed • Change functionality of lookup servers • Add intelligence (IPLs)

  11. Future Work • Security! • Automating connectivity to other P2P networks.

  12. Questions / Comments?

  13. Thank you!

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