Slow Network Between Ubuntu and Win7

Dell / DIMENSION 2400
March 26, 2011 at 17:44:08
Specs: Windows 7 Professional, Ubuntu Server 10.10, 2.8 GHZ/1.5 GB, 1.4 GHZ, 768 MB
I have a server set up on my network that I would like to use as a media server to stream some of my movies to my Xbox. I have the movies on my computer and go to move them over to my server via SFTP, but I get very slow speeds and my computer seems to lag quite a bit. The speeds I'm talking about getting (moving a 700 MB video from my Win7 computer to my Ubuntu Server 10.10, about 10 feet of CAT5e between them) are between 200 KB/s and 230 KB/s. I used to get around 12 MB/s through my network, and in fact still do when moving files from one Win7 machine to another, so I think it's a problem on the Ubuntu machine. I get speeds of about 1.5 MB/s when I try to download a file via HTTP from the server. The lagging I'm mentioning is just a general lag of everything when transferring files via SFTP to my server. What might I be able to do to fix these two problems? I'm not much of a Linux person outside of some simple config and setting up packages, but not much else.

Thanks!

~William
My Site: http://willstech.org/
It's a work in progress! =P


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#1
March 26, 2011 at 19:01:49
Shoot, I just realized that this would probably best be under Networking. Would a mod please move it? Thanks!

~William
My Site: http://willstech.org/


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#2
March 27, 2011 at 14:48:48
It used to work before so what could have changed?

Take a new patch cable and run it between the systems maybe and see if speed improves.

"The era of big government is over," said Clinton 1996


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#3
March 27, 2011 at 14:52:48
It did change, it used to be a Windows XP server, but then I started getting into some Linux stuff, and now it's Ubuntu!

~William
My Site: http://willstech.org/


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Related Solutions

#4
March 28, 2011 at 13:34:41
See how to run and use ifconfig then see this page for how to Changing NIC Speed and Duplex

http://www.linuxhomenetworking.com/...

Without knowing more I'd also suspect other issues like load on cpu or checksum offloading or wrong nic driver being used or wrong nic on the same lan if you have more than one. Could be other system properties causing it too.

"The era of big government is over," said Clinton 1996


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#5
March 28, 2011 at 16:55:07
Okay, ran the mii-tool -v command and everything looks good (Full-Duplex at 100baseTx). I don't think CPU load is an issue because there's never anything on it that would cause it to have load (plus top shows like a maximum of 1.7% CPU used when idle.) How can I check the NIC driver? It's just the integrated NIC that came with the motherboard.

~William
My Site: http://willstech.org/


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#6
March 28, 2011 at 17:33:12
You need to run cpu load when trying to transfer a huge file.

See if you can use ethtools to set checksum offload.

"The era of big government is over," said Clinton 1996


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#7
March 28, 2011 at 19:44:22
Yeah, it's not CPU load because the server's was peaking at about 7% with 5 transfers (about 40 KB/s for each transfer, yeah, slow) but my computer's CPU load was maxxed out =S

~William
My Site: http://willstech.org/


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#8
March 29, 2011 at 12:57:32
Use ethtool to offload checksums.

Might retest this with new ethernet cable too. It may have been bumped in the switch or bad connection.

I'd boot to a live cd to see if it fails exactly the same. Then I'd try another live cd not in same branch. Like Fedora or OpenSuse or BSD's.

"The era of big government is over," said Clinton 1996


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