On 19 aug 2010, at 15:21, Daniel Stenberg wrote: > On Thu, 19 Aug 2010, Joost Huizinga wrote: > >> One item we have been looking into lately is overcoming the inefficiencies >> of the TCP protocol when it comes to long distance connections. Do you think >> that a libcurl running atop UDT (http://udt.sourceforge.net) is something >> that feasible at all? > > Well, libcurl does application layer protocols and transports using them. I'm > not aware of any such protocol that uses "UDT" or similar UDP-based > transports to overcome some of TCP's problems. And I don't see any such > protocol getting any noticable popularity. So no, I don't see any such > attempt coming to libcurl in the short term. > > What particular use do you see for it and where/how would you use it?
Not sure what you mean by 'them' in your first sentence, nevertheless: UDT is being advertised as having an API very similar to sockets, which would make it fairly straightforward to move other applications / application layer protocols using sockets to UDT. A couple of applications exist that makes use of it. http://sourceforge.net/projects/hscp/ http://en.wikipedia.org/wiki/GridFTP The use would to transfer data to places in the world that haven't got high bandwidth and in particular a low latency. Those places now suffer from low download rates. UDT or in general UDP-based transports seem to overcome that issue. I do agree that the solutions do not seem very popular, so if you see alternatives... Thanks, - Joost ------------------------------------------------------------------- List admin: http://cool.haxx.se/list/listinfo/curl-library Etiquette: http://curl.haxx.se/mail/etiquette.html
