Slow FTP transfer times (Partially Fixed)

[igiveup]

Setup:
Server: SCO OpenServer 5.0.5 NIC=Intel Pro 100 S
Client: Windows XP Pro w/SP1 NIC=Intel Pro 100 VE
FTP Software is WS FTP Pro (still in evaluation)


I am transferring files off of an Old production server to be placed on a new backup server. When I connect through WS FTP Pro I don't have any issues until I try to transfer files off via FTP over a LAN connection. There aren't any other clients currently connecting to this server for ANYTHING. When I try and transfer anything off of the Server I get around 90KB/sec, sometimes slower. Honestly I don't use FTP that much (second time in a year) so I have no idea what is typical through FTP, but I was assuming the transfer rates would approach 100Mbit.

The network cards as well as the switch both show Link lights for 100Mbit. As well both OS' show 100Mbit full duplex. It took 4 hours to transfer 1.2 GB of data and it drove me nuts. I then used xcopy to transfer the data to a server and it completed in about 30 minutes. Obviously something is wrong here, but I don't know SCO well enough to know if there are any bandwidth throttling programs on there. I did check the internet server configurations through SCOAdmin but I couldn't find anything.

Any ideas???



EDIT:
Was able to push it up to 65Mbit/sec by increasing the default threads from 1 to 20 and taking the site off of Passive FTP mode.

 

[ahabeger]

at 65 Mbit/sec you might be hitting the limit of the NIC. A lot of 100 Mbit NICs run out of steam at that point, including my Netgear FA311s :|

You might want to back off on the 20 threads as that'll fragment the files that you are downloading horribly, like 2-3 should be good

 

[igiveup]

What I don't understand is why one thread could only pull 9Mbit, max.

 

[Bremen]

The one time I've run into this a cheap hub was the limiting quantity. Although if you've got a switch you should be ok, possibly the cabling isn't up to spec (cat 5e for 100Mb ethernet I believe). Otherwise the software/OS is probably throttling the connection.