-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Jamie Lists Sent: Tuesday, May 01, 2007 12:35 AM To: centos@centos.org Subject: [CentOS] Sftp slow on both our centos installs
The short version. Copying over SFTP to our centos boxes maxes out at 2MB a sec.
The Question: Is there some sort of speed limitation somewhere in the ssh/sftp daemon?
Does anyone have any idea why this could be happening?
The long version We have centos 4.6 installed on 2 different machines, different hardware, different nics. Even on 2 different subnets.
I've tried different switches, 1000 Full/Half 100 Full/Half and still get the same speed. It maxes out at 2MB a sec.
Same switch, network, client using sftp to our xserves gets 10MB a sec. Basically filling the pipe of the network.
The only thing that is the same on both the linux boxes is the distro. So i thought maybe someone may have come across this before.
I haven't tried other protocols yet (FTP and HTTP) I'll check that tomorrow.
Thanks, Jamie -----Reply Message-----
You mentioned you tried different switch speeds/duplexes. You didn't mention if you tried manually setting the speed/duplex on the NIC's rather than use auto-negotiate. If you have the ethtools package installed, and type "ethtool eth0" what is the speed/duplex set to? Does it match what you have set on the switch? If not, try forcing eth0 (or whatever your NIC is) to the speed/duplex you have on your switch and are cabled up for. (e.g. in /etc/sysconfig/network-scripts/ifcfg-eth0 we have: ETHTOOL_OPTS="speed 100 duplex full autoneg off" )
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