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Old 09-25-2009, 11:36 AM   #1
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Registered: Sep 2009
Posts: 19

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Unhappy Very mysterious FTP server uploading very slow!

Hello good people,

I have a kimsufi L server from OVH. Running Debian 5.0 with rtorrent. Used VSFTPD as ftp server.

24 hours ago my ftp server started uploading at around 300KBs. Before that I could download at 1.5MBs (limited by my home connection).

I have done \ tested:

- Asked other people to download from the server. They also got the same speed.
- Removed VSFTPD and installed another server called PROFTP. The speed was still very slow.
- Tried SFTP. The speed didn't change!
- rtorrent can still upload at max speed, over 5MBs, means server isn't throttled.

I asked some of my friends who are into servers and stuff but none of them had any idea what it could be.

Any suggestions? Thanks!
Old 10-01-2009, 01:39 AM   #2
Registered: Jun 2009
Location: Houston, Texas
Distribution: Ubuntu
Posts: 62

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Are you sure it is not being limited by your ISP? I'm not sure where you are located, but usually your ISP will have your download speed anywhere from 3 - 8 MBs, depending on who you're with, etc., but you're upload speed is usually held down to maybe 384 Kbs, because obviously most people surfing are just uploading(sending) a page request and the real bandwidth is used when downloading the page. So, I guess my question is what kind of connection do you have and have done some speed tests on specific sites like or something similar, it should tell you what you're supposed to have. Just some suggestions to get us started in trying to figure out what's going on. Sorry if you have already tried this, but I am trying to get in here and see what I can do to help.
Old 10-02-2009, 08:32 AM   #3
Registered: Jul 2003
Posts: 244

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How about running netperf to test the link speed? You run the server on one machine and the client on another. When you start the client with a command like "netperf -H hostname" (be sure to start the server first) it sends as fast as it can to the server for 10 seconds (a bunch of settings can be changed via switches) and reports the average speed. If you're seeing low speeds, it ain't your server it's the network.

Of course while running netperf I'll usually run collectl as well to show me the second-by-second rates, but that's really only necessary if you think the network is delivering non-uniform rates which is something netperf won't report.



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