[Twisted-Python] UDP with multiple connections
sipickles at hotmail.com
Fri Oct 12 14:14:15 EDT 2007
I thiank you all for your tiem and patience. My understanding has
developed somewhat :)
Carl Zmola wrote:
> I would like to make a general comment about the use of UDP in
> applications. There are some people on this list who can do some
> tricky things with UDP, but as a general rule, what should be
> recommended is "use TCP". If you end up running into issues that TCP
> has problems with, there are other options, but you should have tried
> TCP first. If you are asking advise on this forum on using UDP, the
> first reply should always be: "Why arn't you using TCP?", and the
> second reply should be "Have you actually tried TCP and seen problems
> with it?"
> UDP is fun and if you know what you are doing, you can get some
> benefits out of it, but you have to put an awful lot of work into it
> and I have seen many cases where the promised benefits of using UDP
> are not seen.
> Areas where UDP can give some benefits are:
> Overcoming latency due to a 3way handshake,
> reducing cost if you are charged by the byte (but this can be eaten
> up by development cost and retransmission),
> multicast (but you then need to have control over your network).
> I have heard of at least one case where large UDP applications have
> been put in due to the perceived benefits, only to be replaced by a
> TCP application that actually works.
> zmola at acm.org
> Twisted-Python mailing list
> Twisted-Python at twistedmatrix.com
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