Slow file transfers

jisis · Posted: Mon Oct 20, 2008 11:10 pm Post subject: Slow file transfers

Howdy,

pc1:Blag, wi-fi(54Mb/s), 1gb,1.8Ghz core2duo
pc2: Blag, ethernet, 1gb, 2,4Ghz

Copying files from pc1 > pc2 on home network is slower than I hoped for. I would expect to get at least 20Mb/s with wi-fi involved . Current max. speeds for pc1 > pc2 copies as follows:

SCP: 400-500KB/s
samba:1MB/s
FTP:1MB/s

Downloading via internet on pc2 achieves 2MB/s, which is the limit of the internet connection, but neverthless double the best network speed.

Not done much testing, but I am able to FTP from pc1 > xbox(xbmc) at around 20MB/s, which initially makes pc2 look like the trouble maker..

gr00ve · Posted: Tue Oct 21, 2008 12:34 pm Post subject:

I get around 5 to 6 MB/s ftp transfers off a server running blag on a wired 100mbit connection.
I'm guessing that besides such obvious factors as local firewall and local dns server network card driver is the bottleneck, but I am perhaps wrong.

one other thing to watch out for is if in ifconfig's output you start seeing errors for the interfaces - my experience was that in such case the card or the cable between the two is a bust. not 100% sure if this applies to wireless, as you can get errors logged there for reasons other then a bad card.

Which cards & drivers do you use?

john maclean · Posted: Sat Oct 25, 2008 4:20 am Post subject:

jisis · Posted: Sat Oct 25, 2008 10:57 am Post subject:

it's Intel IWL3945.

This issue on hold as have wounded 2nd machine (see LVM thread).

ta

john maclean · Posted: Sun Oct 26, 2008 11:09 am Post subject:

I know that you are dealing with the lvm issue on the other thread but..

kazim · Posted: Sun Oct 26, 2008 11:36 am Post subject:

Heya. Networking may not be the issue if the interface used in the internet download test is the same one used for pc1>pc2 test, I would look at disk controller / driver or hardware.

FYI: mii-tool don't work on wireless , use the ethtool command instead.