[3624] in North American Network Operators' Group
Re: Why aren't people changing their subject lines when threads
daemon@ATHENA.MIT.EDU (Michael Shields)
Mon Jul 29 10:16:39 1996
In-Reply-To: <199607270154.UAA20524@westie.gi.net>
Date: Mon, 29 Jul 1996 13:51:55 +0000
To: Alan Hannan <alan@gi.net>
From: Michael Shields <shields@crosslink.net>
Cc: paul@vix.com (Paul A Vixie), nanog@merit.edu
At 1996-07-27 01:54 +0000, Alan Hannan wrote:
>] Ping times only correlate to available bandwidth when congestion is bad.
>] Otherwise these two factors are militantly unrelated to each other.
>
> Agreed very much. However, ping times can be used as latency
> determination metrics.
And latency is disproportionately important when you're concerned only with
HTTP performance.
However, pings *can* be used to measure bandwidth, by sending multiple
sizes of ping and measuring the difference in response times between small
and large pings. On a graph of ping size vs. response time, you'd see the
y-intercept representing base latency and the slope representing bandwidth.
This is how bing does its work.
--
Shields, CrossLink.
