[bittorrent] UDP (was: New P2P protocols)

Kenneth Porter shiva at sewingwitch.com
Fri Mar 25 10:44:34 EST 2005


--On Friday, March 25, 2005 1:03 PM +0000 Jeff Burdges 
<weasel at havoc.gtf.org> wrote:

> what is the source of the interest in UDP?

As I see it, BT already has an ack mechanism that duplicates that of TCP, 
so the TCP confirmation isn't needed. If a client doesn't get the stuff it 
expects (either by timeout or checksum failure), it asks again, possibly to 
a different peer. Switching to UDP eliminates the duplication of effort, 
and in the process removes the additional cost of setting up and taking 
down a connection.



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