On 5/1/07, Ioannis Vranos <ivranos@xxxxxxxxxxx> wrote:
Matt Martz wrote: > > I did some quick research on google a few min ago. Thinking back I have > never seen higher than 2MB/s transfer speed using sftp between a Windows > and Linux machine. I have however seen much higher transfer speeds using > sftp/scp between 2 linux machines. > > A few people mentioned they believe the slowness is with the > implementation of sftp/scp/ssh in the Windows app. > > Try doing an sftp or scp transfer between the 2 CentOS machines and look > at the transfer rate. You could also try doing a transfer using Cygwin or > maybe some other win32 ports. However it may just be somehting strange > with Windows. > > ...While typing this I figured I would do some additional testing. I > downloaded VanDyke SecureFX (VanDyke has some of the best SSH > implementations I have seen for windows). My transfer rate was approx > 10MB/s on a 100Mbit connection. Whereas with WinSCP and FileZilla it was > only approx 2MB/s This message reminded me that Winblowz's (at least up to XP) network stack is optimised for dial up speeds, and required tweaking for broadband. Things like "TCP Window", MTU, and other stuff I don't remember now anymore. I suppose you have to tweak it by yourself, there was an app I was using for it on the net. Don't remember it though, but I think a Google search will give you it. Ah, those glorious Winblowz days... _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos
Well here's where we're at today. FYI i'm useing a macintosh with the macintosh program transmit as the transfer program. The file i'm transfering back and forth is a 500 meg .iso So it's not a bunch of little files We worked with 2 more centos 4.4 boxes (sorry i said 4.6 in my origional post) and have the same problem. I turned off autoneg on the nic and got no change. I read somewhere that kudzu caused a problem so i turned that off & rebooted.. no change. I disabled the firewall.. no change Sftp upload is still stuck at 1900KB/s Download speed with sftp is even worse, stuck at about 300KB/s I did a scp between 2 centos boxes and the copy speed was 432KB/s I installed VSFTP to make sure the problem wasn't with the machines/network/configuration etc. I was able to upload using FTP at 10874KB a sec so we know the machine/network/disk/nic etc is up to the task. Jamie _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos
