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SubjectRe: problems achieving decent throughput with latency.
On Mon, Feb 03, 2003 at 04:11:46PM +0000, John Bradford wrote:
> > > TCP can only send into a pipe as fast as it can see the
> > > ACKs coming back. That is how TCP clocks its sending rate,
> > > and latency thus affects that.
> >
> > Wouldn't you just need larger windows? The problem is latency, not
> > bandwidth.
>
> Exactly - the original post says that no problems are experienced
> using UDP, which backs that up.

My TCP may be getting hazy but with latency, TCP may limit the amount of
packets 'in flight'. I think this is called the 'cwnd', congestion window. I
also seem to recall that this window is limited to the actually negotiated
TCP window size.

But here I leave this discussion as I've swapped out the finer details of
congestion windows to the Stevens books which other's have probably read
more recently than I did.

Regards,

bert

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