[bittorrent] UDP

Olaf van der Spek olafvdspek at gmail.com
Fri Apr 1 04:48:33 EST 2005

On Apr 1, 2005 1:22 AM, Joseph Ashwood <ashwood at msn.com> wrote:
> [written later: complete chaos on my internet connection with regards to
> sending email, sorry about the delay]
> Was this deliberately taken off-list? If not go ahead and bring it back
> on-list.

No, it wasn't, I clicked the wrong button too.
> ----- Original Message -----
> From: "Olaf van der Spek" <olafvdspek at gmail.com>
> To: "Joseph Ashwood" <ashwood at msn.com>
> Sent: Wednesday, March 30, 2005 12:49 AM
> Subject: Re: [bittorrent] UDP
> > The ACKs are also used for congestion/rate control. How would you do
> > that without ACKs?
> Two ways: First ignore the problem. Having to make a few extra requests for
> packets that have been dropped won't pose too much of a burden on the
> network. Second by requesting few enough packets that your connection won't
> be swamped. The overall connection rate can be estimated based on how high
> the incoming rate can be before it caps. Between these it should be possible

I don't think that's going to work. Congestion avoidance and rate
control are far too complex for such a simple solution.
What about the outgoing rate?

> to get most of the congestion and rate control that can be achieved through
> TCP, admittedly not quite as much but any choice will certainly be a
> trade-off.
>                Joe

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