On 5/1/07, Ioannis Vranos <ivranos at freemail.gr> 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 at centos.org > 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