1. Matthias Bender1 Why P2P Sucks… Matthias Bender D5 – Databases and Information Systems Max-Planck-Institut für Informatik CIDR 2007 Asilomar, CA

2. Matthias Bender2 Why P2P Sucks… … at least a bit Matthias Bender D5 – Databases and Information Systems Max-Planck-Institut für Informatik CIDR 2007 Asilomar, CA

3. Matthias Bender Why P2P Sucks... at least a bit 3 Where is P2P? P2P has been around for years (Generations of) Researchers have worked on P2P… … and tackled some problems we wouldn‘t have had without them …  P2P matured and ready-to-use?!?.

4. Matthias Bender Why P2P Sucks... at least a bit 4 Where is P2P? P2P has been around for years (Generations of) Researchers have worked on P2P… … and tackled some problems we wouldn‘t have had without them …  P2P matured and ready-to-use?!? But: Somehow P2P not catching on in the „real“ world Perception still dominated by early file-sharing systems, e.g. Napster… … which isn‘t even a P2P system after all… … and has gained negative reputation … due to legal issues (P2P = Pirate-to-Pirate)

5. Matthias Bender Why P2P Sucks... at least a bit 5 The Quest for the „Killer Application“ P2P Sales Pitch – No central entity, privacy, anonymity, … Service Providers: not really intriguing as a business model  If nobody „offers“ it, people need to run it themselves… P2P Showcase: Web Search Users: Google is doing a pretty good job…

6. Matthias Bender Why P2P Sucks... at least a bit 6 The Quest for the „Killer Application“ P2P Sales Pitch – No central entity, privacy, anonymity, … Service Providers: not really intriguing as a business model  If nobody „offers“ it, people need to run it themselves… P2P Showcase: Web Search Users: Google is doing a pretty good job (not only because they are sponsoring this conference…)  Missing incentive to use P2P Web Search! Incentives and Business Model: Two sides of the same coin Business Model is Incentive for Service Providers

7. Matthias Bender Why P2P Sucks... at least a bit 7 So why did file-sharing catch on? Napster / Gnutella / Kazaa caught on because users couldn‘t access data otherwise (at least not for free)

8. Matthias Bender Why P2P Sucks... at least a bit 8 So why did file-sharing catch on? Napster / Gnutella / Kazaa caught on because users couldn‘t access data otherwise (at least not for free) Napster / Gnutella / Kazaa didn‘t last because users couldn‘t access data otherwise (at least not for free) Music Industry doesn‘t like it… Insight: Web Data is freely available – no user incentive?!?

9. Matthias Bender Why P2P Sucks... at least a bit 9 So what does it mean for P2P (Search)? P2P Killer Application requires incentives Possible User Incentive: Improved Web Search Experience „Social Search“ on Intellectual Input of User Community … that users wouldn‘t be willing to provide for commercial purposes  Wikipedia Possible Service Provider Incentive: non-free original data Business Peers run network in order to sell their data… … they would be willing to give out for indexing otherwise