maximum network performance? [was: Re: bad nfs performance [was: Re: Promise PDC20268]]

[Manuel Zamora <manuel_(_at_)_zamora_(_dot_)_de>]

I tracked down the problems, as there were two:

First I patched the linux kernel with some experimental nfs drivers... and 
wow, performance increased to the level ftp gave me - 3-4megs/second. Not 
THAT much, but much better...

Then, I exchanged the nic, threw out the allied telesyn card (chip afaik 
rtl8139) and put an 3com 905TX card in. performance increased to 
5-6megs/second :) (with ftp/nfs/smb/http)

With an old benchmark utility ttcp, i tested the network performance i could 
get between these two machines. With tcp i got ~5-6megs/second and with udp 
~9 megs/second. Why is tcp that slow? I am not a network expert, is that 
transfer rate normal? If not, how can I try to increase it? (system 
description in my first post, "Promise PDC20268"). 

Thanks,
Manuel

-- 
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Manuel Juan Zamora-Morschhäuser              http://www.zamora.de

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