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<DIV><FONT size=2 face=Arial>No.</FONT></DIV>
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style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=steve@connection-telecom.com
href="mailto:steve@connection-telecom.com">Steve Davies</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=bloat@lists.bufferbloat.net
href="mailto:bloat@lists.bufferbloat.net">bloat@lists.bufferbloat.net</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, February 04, 2011 8:08
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Bloat] Large buffers:
deliberate optimisation for HTTP?</DIV>
<DIV><BR></DIV>Hi,
<DIV><BR></DIV>
<DIV>I'm a new subscriber and hardly a hardcore network programmer. But
I have been working with IP for years and even have Douglas Comer's books...
</DIV>
<DIV><BR></DIV>
<DIV>I was thinking about this issue of excess buffers. It occurred to
me that the large buffers could be a deliberate strategy to optimise
HTTP-style traffic. Having 1/2 MB or so of buffering towards the edge
does mean that a typical web page and images etc can likely be "dumped" into
those buffers "en-bloc".</DIV>
<DIV><BR></DIV>
<DIV>Or maybe its not so deliberate but just that testing has become fixated
on "throughput" and impact latency and jitter has been ignored. If you
have a spanking new Gb NIC the first thing you do is try some scps and see how
close to line-speed you can get. And lots of buffering helps that test
in the absence of real packet loss in the actual link.</DIV>
<DIV><BR></DIV>
<DIV>Perhaps the reality is that our traffic patterns are not typical of
broadband link usage and that these large buffers that mess up our usage
patterns (interactive traffic mixed with bulk data), actually benefit the
majority usage pattern which is "chunky bursts".</DIV>
<DIV><BR></DIV>
<DIV>Would you agree with my logic?</DIV>
<DIV><BR></DIV>
<DIV>Steve</DIV>
<DIV><BR></DIV>
<P>
<HR>
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