Hi Thomas,

I tried it on my machines (AIX 4.3.3 H80)
this is what I got :
ftp> put "|dd if=/dev/zero bs=32k count=10000" /dev/null
200 PORT command successful.
150 Opening data connection for /dev/null.
10000+0 records in.
10000+0 records out.
226 Transfer complete.
327680000 bytes sent in 16,33 seconds (1,959e+04 Kbytes/s)
local: |dd if=/dev/zero bs=32k count=10000 remote: /dev/null

Best wishes 
Chris

> -----Ursprüngliche Nachricht-----
> Von:  Rupp Thomas (Illwerke) [SMTP:thomas.rupp AT ILLWERKE DOT AT]
> Gesendet am:  Dienstag, 23. Juli 2002 18:51
> An:   ADSM-L AT VM.MARIST DOT EDU
> Betreff:      Gigabit Ethernet Performance
> 
> Hi TSM-ers,
> 
> our newly installed Gigabit Ethernet seems to have some performance
> problems.
> When I do the following FTP command between two UNIX (AIX) machines I only
> get about 8Megabyte per second.
> 
> # ftp 10.135.11.55
> Name: adminrt
> Password:
> ftp> put "|dd if=/dev/zero bs=32k count=10000" /dev/null
> 200 PORT command successful.
> 150 Opening data connection for /dev/null.
> 10000+0 records in.
> 10000+0 records out.
> 226 Transfer complete.
> 327680000 bytes sent in 39.5 seconds (8102 Kbytes/s)
> local: |dd if=/dev/zero bs=32k count=10000 remote: /dev/null
> 
> This command transfers data from nowhere to nowhere so no disk
> is involved. The performance numbers only include network, network
> adapter,
> TCP/IP and a bit of UNIX.
> Do you think 8MB/s is OK for Gigabit Ethernet?
> Would anyone be so kind and test this command in their own UNIX
> environment
> and tell me the numbers?
> 
> Thanks in advance and greetings from Austria
> Thomas Rupp
> Vorarlberger Illwerke AG
> MAIL:   thomas.rupp AT illwerke DOT at
> TEL:    ++43/5574/4991-251
> FAX:    ++43/5574/4991-820-8251
> 
> 
> 
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