🚀 go-pugleaf

Alan Palmer wrote:
> 
> I have a ISA-based 50 MHz i486 box connected to a 166 MHz UDB (Multia)
> via 2 metres of 10Base2 coax. Nothing else is connected to this network
> (apart from cable terminators).
> 
> The i486 box has an Allied Telesyn AT1500 ethernet card (ISA); the UDB
> has a 21040 PCI ethernet interface. The i486 box runs Debian 1.1;
> the Multia runs NT3.51 (I haven't put Linux on it yet).
> 
> If I transfer large files (> 300 Kbytes) using ftp from either box, I
> get a throughput of about 100 kbyte/s, plus or minus 20%.
> 
> This is less than 10% of the raw bit rate available (10Mbits/s)
> on the coax.
> 
> Considering that the AT1500 can send/receive packets back-to-back, and
> that there are only two hosts on the network, I would have expected a
> higher throughput.
> 
> Am I getting reasonable performance for the hardware I have? Are there
> no-cost ways of increasing this performance? (Apart from putting Linux
> on the UDB, of course.)
> 
> What kind of ftp throughput do other people get?
> 
> Thanks,
> 
> Alan

Alan,

I have two Linux hosts at home on a 10Base2 Lan.  They both have old
8 bit WD8003E cards in them.  One is a 6x86 P200, the other is a
Pentium 90.

I just upgraded one of the hosts a few weeks ago, and FTP was one
thing I looked at.  I now get _up_to_ 610KB/s with a FTP GET in
Binary to /dev/null.

Before; when the 6x84 was still a 486-100, I would get around
520KB/s with the same FTP test.

So your 100KB/s is a little on the low side.

From memory I was FTPing around a copy of a kernel; around the
300K mark in size.  Going to /dev/null helps, and the second
FTP of the file helps, as the first time the file is read
from disk; but the second time I think the file is cached
in memory.  As both PC's have IDE drives, eliminating them
can only help in the throughput.

It was no exhaustive test, just me playing around seeing
just how things went.

Brian
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Brian Miller                                 Telstra
CDN Product Group                            30/242 Exhibition Street
ITG Communication Network Platforms          Melbourne, VIC 3000
bmiller@telstra.com.au                       Australia
Tel: +61-3-9632-3883                         FAX: +61-3-9632-3884
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