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Re: NFS slow/lockups



In article <[🔎] 20041013223347.GA2883@scatterbolt.r00tserverz.net>,
Tim Kelley  <tpk@r00tserverz.net> wrote:
>On Wed, Oct 13, 2004 at 09:05:21PM +0100, Alan Chandler wrote:
>> Just to show its not networking problems, I have resorted to copying
>the files 
>> via scp - even encrypted I am getting about 0.5Mb/sec
>
>That's horrible! Is this a 10Mb network or dialup or what? Surely you
>mean .5 MBytes/sec (which also isn't too hot for a 10Mbit ethernet).
> 
>> Any idea whats wrong and how to improve performance?
>
>Some basic things:
>
>1. If you have a switch, make sure it your interfaces are at full
>duplex

But do not force the switch interface to full duplex. At least on
Cisco's, if you configure the switch at full duplex (as opposed
to "auto"), then it will not negotiate full/half duplex anymore.
And since almost all Linux ethernet device drivers default to
half-duplex, you get a guaranteed duplex/half-duplex mismatch.

And .5 Mbytes/sec on a 100 mbit network is what you end up with.

Mike.
-- 
"In times of universal deceit, telling the truth becomes
 a revolutionary act." -- George Orwell.



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