P2P tutorial (ESEC 2001) Peer-to-Peer vs.C/S and web-based Systems Client-Server Session- Peer-to-Peer Web-based based Coupling tight loose very loose Comm. Style asymmetric asymmetric symmetric Number of moderate high Clients (1000) (1,000,000) high(1,000,000) Number of Servers few (10) many (100,000) none(0) 2001 Karl Aberer,Manfred Hauswirth ESEC/PSE 2001 2 Coupling vs.Scalability session-based push-based event-based web-based peer-to-peer Scalability 2001 Karl Aberer,Manfred Hauswirth ESEC/FSE 2001 (c)2001 Karl Aberer,Manfred Hauswirth 12P2P tutorial (ESEC 2001) (c) 2001 Karl Aberer, Manfred Hauswirth 12 © 2001 Karl Aberer, Manfred Hauswirth ESEC/FSE 2001 23 Peer-to-Peer vs. C/S and web-based Systems Client-Server Session￾based Web-based Peer-to-Peer Coupling tight loose very loose Comm. Style asymmetric asymmetric symmetric Number of Clients moderate (1000) high (1,000,000) high (1,000,000) Number of Servers few (10) many (100,000) none (0) © 2001 Karl Aberer, Manfred Hauswirth ESEC/FSE 2001 24 Coupling vs. Scalability Scalability Coupling session-based web-based push-based event-based peer-to-peer