25-P2P-online - The End of the Road P2P Comments Evaluation...

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1 The End of the Road: P2P, Comments, Evaluation EE122 Fall 2011 Scott Shenker http://inst.eecs.berkeley.edu/~ee122/ Materials with thanks to Jennifer Rexford, Ion Stoica, Vern Paxson and other colleagues at Princeton and UC Berkeley
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Announcements • HW3, WS3 keys coming tomorrow (after I land) • WS4 coming Monday • No office hours tomorrow (unless you are in EWR) • Crazy week next week: will post office hours – Probably 5:45 on Monday night and Tuesday night – Other hours available in return for chocolate • No review today, just use worksheets and OH – Summarizing 25 lectures in 1 lecture is insanity • Project, P2P, Comments, Evaluation…. 2
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Project 3 Town Hall • Announcements and questions! • Last chance to complain…. 3
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4 Peer-to-Peer
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Why should we care about P2P? • Largely about stolen content • Why is that something we should teach? 5
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Three Reasons • P2P represents new economic model for systems • P2P represents a new design model for systems • Bragging rights……you’ll see what I mean. 6
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Peer-to-Peer Design/Econ Paradigms Design paradigm : No central contol – Large number of identical nodes – Highly resilient and scalable Economic model : leverage user nodes – No need for huge investment – Broad geographic distribution – Self-scaling • Will discuss both, but start with economic model…. – A continuing struggle for control 7
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In the beginning…. . • 1 st realtime person-to-person communication system – Telegraph was station to station – Mail was asynchronous – … • Development of phone technology was complicated – Makes today’s patent fights seem like child’s play 8
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Early History of Telephone Technology • 1844 Innocenzo Manzetti: idea of a “speaking telegraph” (telephone). • 1854 Charles Bourseul: article on electric transmission of speech • 1861 Johann Philipp Reis: demonstrated the Reis telephone before the Physical Society of Frankfurt. • 1865 “It is rumored that English technicians to whom Mr. Manzetti illustrated his method for transmitting spoken words on the telegraph wire intend to apply said invention in England on several private telegraph lines” 9
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Continued History • 1871 Antonio Meucci files a patent describing communication of voice by wire. • 1874 Meucci, after having renewed the application for two years does not renew it again, and application lapses.
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25-P2P-online - The End of the Road P2P Comments Evaluation...

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