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Date:      Thu, 03 Jan 2002 20:42:24 -0500
From:      Sergey Babkin <babkin@bellatlantic.net>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        Josef Karthauser <joe@tao.org.uk>, Alexander Haderer <alexander.haderer@charite.de>, freebsd-hackers@FreeBSD.ORG
Subject:   Re: FreeBSD performing worse than Linux?
Message-ID:  <3C350880.ACC0E6D@bellatlantic.net>
References:  <20011128153817.T61580@monorchid.lemis.com> <15364.38174.938500.946169@caddis.yogotech.com> <20011128104629.A43642@walton.maths.tcd.ie> <5.1.0.14.1.20011130181236.00a80160@postamt1.charite.de> <200111302047.fAUKlT811090@apollo.backplane.com> <20011130231802.E99520@tao.org.uk> <200111302345.fAUNjLI27798@apollo.backplane.com> <20011228153330.A11251@tao.org.uk> <200112300644.fBU6iVG10959@apollo.backplane.com> <20011230182612.D5642@tao.org.uk> <200112301917.fBUJHdm13120@apollo.backplane.com>

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Matthew Dillon wrote:
> 
> :
> :No switching infrastructure.  It's a 10mb/s half duplex ethernet
> :network, with two hubs between the two machines.
> :
> :Joe
> 
>     I think there may be a problem with your hub setup (e.g. exceeding the
>     hub count or end-to-end length limitations) that is either resulting
>     in packet loss, or the packet burst is locking up the ethernet long
>     enough to cause a timeout.  The problem looks very much like an
>     unrecognized collision to me.
> 
>     I recommend replacing the hubs with switches.  The whole topology will
>     be happier.

Or maybe just with better hubs. I've seen cheap hubs that
started losing packets when the load went above ~5MB/s.

-SB

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