I have a machine in a customers datacenter.
My machine is a Dual 3.2Ghz Xeon running Suse 10.0. (More details below).

My problem is that network activity into the box (e.g. an ftp get) is very fast (ftp reports 192.80 MB/s).
However network activity out of the box (e.g. an ftp put) is slow (ftp reports between 5 and 15 KB/s).

Could it be the half duplex? Is this a problem on this machine or with what the device is connected to (Sorry - I haven't been to the datacenter myself - it's in a different country, so I don't know what it's connected to).

Following is some machine info....

# dmesg | grep eth0 gives,

342:eth0: Tigon3 [partno(N/A) rev 1100 PHY(5703)] (PCIX:100MHz:64-bit) 10/100/1000BaseT Ethernet 00:14:c2:60:27:21
343:eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] Split[0] WireSpeed[1] TSOcap[0]
344:eth0: dma_rwctrl[769f4000]
355:tg3: eth0: Link is up at 100 Mbps, half duplex.
356:tg3: eth0: Flow control is off for TX and off for RX.
367:eth0: no IPv6 routers present

# uname -a gives,
Linux au105 2.6.13-15-bigsmp #1 SMP Tue Sep 13 14:56:15 UTC 2005 i686 i686 i386 GNU/Linux

# ifconfig gives,
eth0 Link encap:Ethernet HWaddr 00:14:C2:60:27:21
inet addr:160.222.193.46 Bcast:160.222.193.255 Mask:255.255.255.0
inet6 addr: fe80::214:c2ff:fe60:2721/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:11201226 errors:0 dropped:0 overruns:0 frame:0
TX packets:5492896 errors:92 dropped:0 overruns:0 carrier:0
collisions:2859635 txqueuelen:1000
RX bytes:3482209282 (3320.8 Mb) TX bytes:2145988770 (2046.5 Mb)
Interrupt:90

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:11600718 errors:0 dropped:0 overruns:0 frame:0
TX packets:11600718 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:305399509 (291.2 Mb) TX bytes:305399509 (291.2 Mb)

I look forward to a response,
Regards,
Ian.

ok, silly question time.

are you ftp'ing from your home machine to the server? and if so, what is your home connection? are you using domestic cable/dsl, by any chance?

many domestic cable lines have a high downstream speed, and a comparatively small upstream speed. for example, my dsl achieves ~240K/s down, and only ~25K/s up. if you are connecting from your home machine to your remote server, it doesn't matter how fast the server can transport data, the bottleneck exists in your home connection.

Hi,
No, nothing to do with home at all. This machine is sitting in a corporate datacenter (not managed or physically accessible by myself as it's in a different country).
However, I have ssh access to the box. I am trying to ftp to another machine in the datacenter.
I don't know whether it's just ftp, but unfortunately I have limited access and ftp seems the only way to measure network performance.

On this box, I am running a sophisticated factory rollstock simulation application. This application is frequently copying files across the network.
We noticed the performance problem when this application started.

My concerns are,
Is it a driver issue?
Is it a half duplex issue - and if so, is it half duplex because it is connected to equipment that is forcing half duplex?

Regards,
Ian.