ANINTRODUCTIONABOUTP2PCOMPUTING

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,AN INTRODUCTION ABOUT P2P COMPUTING,Group co-workers: GONG Bin, GUO Dong, XIA Jinguang,Part-Time Postgraduate, PolyU, HK,1,BACKGROUND-An old “new”concept,Original form,Current attention on P2P: Internet Age Computing,Cable line,Share files,Networking restrictions prevented the approach from being applied to larger group.,Interneta vast global networkcomputer can be connected in a new way.,Napster drove the interest in P2P.,Nowadays, several major industry players announced P2P initiatives, such as,SUN, INTEL, Microsoft,and so on.,2,Napster,Napster,诉讼大事记1999年5月，由,Shawn Fanning,和,Sean Parker,共同创办的文件共享社区网站,Napster,正式成立。该公司最主要的服务是，为其用户提供一种便捷、易用的界面以实现媒体文件的搜寻及共享；同时还为音乐迷们提供相互交流的论坛，以及实时讯息、聊天室、用户书签等产品。,12月7日，美国唱片业协会(,RIAA),代表环宇音乐、索尼音乐、华纳音乐、百代唱片、,BMG,等七大唱片公司以违反版权保护法为由把,Napster,公司推向法庭。他们称,Napster,向网民提供,MP3,文件共享软件侵犯了音乐版权，要求法院关闭该公司并赔偿损失1亿美元。,2000年4月13日，重金属乐队,Metallica,起诉,Napster，,称其侵犯了自己的版权，并涉嫌诈骗。此后不久，歌星,Rapper Dr. Dre,起诉,Napster；Metallica,乐队的击鼓手,Lars Ulrich,和律师则对多达33.5万名的,Napster,用户提起诉讼，这些用户通过,Napster,提供的服务非法共享该乐队的音乐。,5月5日，美国地区法官,Marilyn Hall Patel,作出判决，依据美国2000年数字版权法，,Napster,的“安全港”资格被取消。,6月12日，美国唱片协会(,RIAA),和美国音乐出版协会(,NMPA),向加利福尼亚州北地区联邦地方法院起诉,Napster,公司，请求法院禁止在社会上流通,Napster,公司的,MP3,文件交换软件“,Napster”。,7月11日，参议院就围绕,Napster,展开的诉讼召开听证会，无果而终。一些议员敦促国会立法，以澄清,Napster,公司是否违反了知识产权法；而支持,Napster,一方的人却认为国会不应该现在介入双方的争端，以免影响新技术的发展。,7月26日，,Patel,同意美国,RIAA,的要求，作出初步判决，命令,Napster,立即停止服务。,7月28日，美国第九巡回上诉庭暂缓了较低一级法庭的禁令，认为,Patel,的判决会引发大量问题。,10月31日，,Napster,宣布同德国的媒体巨人贝特斯曼集团组成伙伴关系，共同开发基于会员制度的音乐发放系统。通过这种方式，可以保证对艺术家的付款。根据双方的协议，贝特斯曼同意撤消对,Napster,的起诉。,Napster,可使用贝特斯曼的音乐。,2001年2月12日，美国第九巡回上诉庭作出决定，,Napster,必须终止其免费互联网服务，并不再向音乐迷提供共享版权保护音乐的服务。,3月2日，,Napster,公司宣布，该公司将开始阻止用户们下载大约1百万首受版权保护的音乐曲目，以遵守,Patel,随时可能下达的一项新的法律禁令。,3月6日，美国地区法官,Marilyn Hall Patel,做出判决， 责令,Napster,在五个工作日内删除所有存在争议的歌曲。,3,WHAT IS P2P,Peer to Peer,Peer to Peer computing,Share information,Equal position,Decentralized control,server,client,client,x,C/S,Server,Server,Server,P2P,4,WHAT IS A PURE SENSE OF P2P,The application must be accommodate dynamic network connectivity patterns and temporary network address.,Peers must be able to operate with a significant level of autonomy ( that is, minimal involvement of centralized resources, such as a server).,5,WHAT IS TRULY MOTIVITY?,The personal computers power not only acted as the browser, but also connected in such a way that their resources amount can be entirely shared.,Conservative estimation:,100 million PC,X,Average processing speed 100MHz,Average storage volume 100MB,For example:,NETBATCH( P2P application) help INTEL saved 500 millions developing cost in the past ten years.,6,IS P2P A PERFECT ONE?,Scalability,Security,Management,Performance,Difficult to find the commercial future,P2P will need to evolve to survive.,Legality and ethics of the practice of copyright,7,POTENTIAL BUSINESS APPLICATIONS,Collaborative working,Auctions arena,In-depth search engineer,E-game,8,OUR OPINIONS,We havent realize the full potential of,a global network, that is to say there have,a gold mine,to be exploit.,There have lots problems to be solved about the P2P application, first, we must care about the,copyright, then, we must distinguish the,business mode,: who gets paid, and how.,9,IN ADDITIONAL,10,PROFITABLITY MODE,Napster,mode,Lightshare,mode,Popular Power mode,DataSynapse,mode,Synthesized mode,11,CONCLUSION,In conclusion, you couldnt pull all data in one server. Someone who moved the centralized server will cause a disaster. There only have people who lost their eyes and useless hardware remained.,12,