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Re: Question about propagation and queuing delays
- From: Patrick W. Gilmore
- Date: Mon Aug 22 11:47:29 2005
On Aug 22, 2005, at 11:32 AM, Eric A. Hall wrote:
I think the key here is "when you are suffering congestion".
On 8/22/2005 11:14 AM, David Hagel wrote:
This is interesting. This may sound like a naive question. But if
Latency is cumulative. Knocking a little time off Part A will still
queuing delays are so insignificant in comparison to other fixed
components then what does it say about the usefulness of all the
extensive techniques for queue management and congestion control
(including TCP congestion control, RED and so forth) in the
today's backbone networks?
shorten total time, regardless of the time occupied by Part B
Queuing behaviors are also significant when you are suffering
apart from the delay factors
RS said that queueing delay is irrelevant when the link was between
60% and > 97% full, depending on the speed of the link. If you have
a link which is more full than that, queueing techniques matter.
Put another way, queueing techniques are irrelevant when the queue
size is almost always <= 1.