Wow, very interesting. I can see the value of downloading in parallel from multiple mirrors (though I'm surprised that enough content is "accidentally mirrored" on multiple webservers to make this feature valuable in the general case).
As for the Xunlei P2P technology, any idea how it works? -david > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:p2p-hackers- > [EMAIL PROTECTED] On Behalf Of Ranus > Sent: Friday, December 29, 2006 12:49 AM > To: [EMAIL PROTECTED]; 'theory and practice of decentralized computer > networks' > Subject: RE: [p2p-hackers] Xunlei > > Actually, what Xunlei uses is called P2SP. That means a user download from > other users and multiple servers simultaneously. However, due to bandwidth > restraints and online time, most downloads are provided by public file > servers (through either http or ftp). > > In this way, a user can occupy resources of many servers, while only > access > one webpage (the original download page it visits). Therefore, most > servers > providing downloads receive nothing for these resources, because users do > not click their links or view their ads. What's more, Xunlei has opened > its > own search engine and webpages so that it can provide downloads without > really hosting anything but metadata. > > Recently, downloading sites who actually host files are proposing > countermeasures against Xunlei. One particularly simple solution is to > repack a file which leads to change of file hash. > -- > Ranus Yue > Tsinghua University > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Lucas Gonze > > Sent: Friday, December 29, 2006 1:33 PM > > To: theory and practice of decentralized computer networks > > Subject: Re: [p2p-hackers] Xunlei > > > > So what it does is locate the same file on multiple stable > > public web servers? > > > > Donny T. Daniel wrote: > > > Hi Lemon, > > > > > > I don't think there is any download from a user at all .. > > > It is just the identification of multiple download servers > > from where > > > you can get the same file. > > > > > > Regards, > > > D > > > > > > On 12/29/06, *Lemon Obrien* <[EMAIL PROTECTED] > > > <mailto:[EMAIL PROTECTED]>> wrote: > > > > > > when your talking about URL's does that mean Xunlei > > only works with > > > TCP/IP and you can only download from those users who > > arn't behind a > > > firewall or have opened up their firewall on port 80? > > > > > > > > > */"Rick L.Y. Eagles" <[EMAIL PROTECTED] > > > <mailto:[EMAIL PROTECTED]>>/* wrote: > > > > > > Hi > > > > > > As far as I know, it uses file hash as index to > > locate download > > > URLs, when a client finishes downloading, it sends > > file hash and > > > URL to Xunlei's server, so the server may associate > > a file hash > > > to many URLs in different download servers, > > indecating that they > > > are the same file. When another client download a > > file from a > > > URL, it send the URL to Xunlei's server, and the server will > > > return to the cilent other URLs it can download in parallel. > > > Compare to downloading from a download server with > > multi-threads > > > in parallel, downloading from many different servers with > > > multi-threads at the same time will be much faster. > > > > > > And now, somebody told me it has supported BT > > protocol, but I > > > haven't used this function, and I don't know how it works. > > > > > > BTW: Newest version FlashGet is very similar to > > Xunlei, but the > > > latter works better, I think because it has more users, that > > > means it has more (file hash, URL) pairs, > > especially in China. > > > > > > > > > 2006/12/29, David Barrett <[EMAIL PROTECTED] > > > <mailto:[EMAIL PROTECTED]>>: > > > > > > Can anyone describe what Xunlei is all about? > > The rumormill > > > is suggesting Google is making a crazy huge > > investment into > > > this Chinese P2P company, but I don't know > > anything about > > > its technology. > > > > > > It sounds like it started out as a download accelerator > > > (like FlastGot) and then added in some P2P download > > > functionality, but I'm not sure what that technology is > > > like. Does it use central indexing servers? DHT? > > > Gnutella? Not sure. > > > > > > Has anyone used it and/or studied it, and can > > you give your > > > impressions? > > > > > > -david > > > > > > > > > _______________________________________________ > > > p2p-hackers mailing list > > > p2p-hackers@lists.zooko.com > > <mailto:p2p-hackers@lists.zooko.com> > > > http://lists.zooko.com/mailman/listinfo/p2p-hackers > > > <http://lists.zooko.com/mailman/listinfo/p2p-hackers> > > > > > > > > > > > > _______________________________________________ > > > p2p-hackers mailing list > > > p2p-hackers@lists.zooko.com > > <mailto:p2p-hackers@lists.zooko.com> > > > http://lists.zooko.com/mailman/listinfo/p2p-hackers > > > > > > > > > > > > > > > You don't get no juice unless you squeeze > > > Lemon Obrien, the Third. > > > > > > http://www.tamago.us > > > _______________________________________________ > > > p2p-hackers mailing list > > > p2p-hackers@lists.zooko.com <mailto:p2p-hackers@lists.zooko.com> > > > http://lists.zooko.com/mailman/listinfo/p2p-hackers > > > > > > > > > > > > > > > > > ---------------------------------------------------------------------- > > > -- > > > > > > _______________________________________________ > > > p2p-hackers mailing list > > > p2p-hackers@lists.zooko.com > > > http://lists.zooko.com/mailman/listinfo/p2p-hackers > > > > _______________________________________________ > > p2p-hackers mailing list > > p2p-hackers@lists.zooko.com > > http://lists.zooko.com/mailman/listinfo/p2p-hackers > > _______________________________________________ > p2p-hackers mailing list > p2p-hackers@lists.zooko.com > http://lists.zooko.com/mailman/listinfo/p2p-hackers _______________________________________________ p2p-hackers mailing list p2p-hackers@lists.zooko.com http://lists.zooko.com/mailman/listinfo/p2p-hackers
