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Date:      Thu, 29 Nov 2001 19:26:50 -0800
From:      Ted Faber <faber@ISI.EDU>
To:        Pierre Beyssac <pb@fasterix.freenix.org>
Cc:        Leo Bicknell <bicknell@ufp.org>, Josh Paetzel <friar_josh@webwarrior.net>, jc@irbs.com, freebsd-hackers@FreeBSD.ORG
Subject:   Re: FreeBSD performing worse than Linux?
Message-ID:  <20011129192650.D64050@pun.isi.edu>
In-Reply-To: <20011130032345.A23415@fasterix.frmug.org>; from pb@fasterix.freenix.org on Fri, Nov 30, 2001 at 03:23:45AM %2B0100
References:  <20011128153817.T61580@monorchid.lemis.com> <15364.38174.938500.946169@caddis.yogotech.com> <20011129004234.A16101@exuma.irbs.com> <20011130010354.A21307@fasterix.frmug.org> <20011129184414.F522@twincat.vladsempire.net> <20011130022547.A21889@fasterix.frmug.org> <20011129204225.A63957@ussenterprise.ufp.org> <20011130032345.A23415@fasterix.frmug.org>

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On Fri, Nov 30, 2001 at 03:23:45AM +0100, Pierre Beyssac wrote:
> On Thu, Nov 29, 2001 at 08:42:25PM -0500, Leo Bicknell wrote:
> > *grumble*  I'll try to avoid my tirade.  16K _will cause problems for
> > virtually all users_.  You can do the math and see it won't keep a T1
> > full across country.  
> 
> I can't reproduce this result, 16K fills a T1 for 11 ms, which is
> 22000 km (at 2/3 of light speed), enough to get halfway round the
> earth...

Not *this* Earth, what with real equipment and all.

I get 22ms to my home machine less than 6 miles from my work machine via
DSL.  Both machines have very good connectivity, but there are delay
artifacts in the world.  And pinging ctr.columbia.edu from my machine in
Southern California gets me 70 ms.  Neither of those should show the DSL
artifact.  Columbia's not 9065 miles away, even by wire length.

And, not to be too pedantic, you've calculated the 2/3c distance for
110ms, not 11 ms.  :-)


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