# Turn off SACK
net.ipv4.tcp_sack = 0
and execute sysctl -p to apply it. You can also use sysctl -w
net.ipv4.tcp_sack=0 to turn it off temporarily. Our file transfers worked
just fine after the change.
I realize there are differences our situation and yours and this might not
work in
I'm not sure what would cause that, but I'd use rsync over ssh instead of sftp
anyway - and use the -P option to permit restarting.
If it were up to me, we'd take that route. The software the client is
using is WinSCP which does have a restart feature, however it's not
working for us. I'm
Sean Carolan wrote on Tue, 22 Dec 2009 03:08:53 -0600:
The software the client is
using is WinSCP which does have a restart feature, however it's not
working for us.
Tell him to switch WinSCP to SCP mode.
Kai
--
Kai Schätzl, Berlin, Germany
Get your web at Conactive Internet Services:
Tell him to switch WinSCP to SCP mode.
Kai
Tried that, it still fails the same way. Here's the short list of
what I've tried to troubleshoot this:
Used SCP via the gui and command line
Used SFTP via the gui and command line
Ran yum update to bring all packages up to date
Tried stock CentOS
-Original Message-
From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On
Behalf Of Sean Carolan
Sent: Tuesday, December 22, 2009 6:13 AM
To: CentOS mailing list
Subject: Re: [CentOS] SFTP - stalled - on large files
Tell him to switch WinSCP to SCP mode.
Kai
Just an idea or thought on it. You never said what the file size was or did
you? My idea is that is, there not a file size limitation on transfer to
and from the server? I thought there was? Check you vsftpd.conf out or
what ever ftp server your running for the size limitation. Maybe some
Load balancer... is that set up to maintain connections, or will it, like
IBM's
WebSeal, go to whichever server is next/least used in the middle of a
connection?
It's set to use least connection but there is only one server behind
the virtual IP at the moment.
I'm reasonably sure at this
We had a similar problem copying files between servers on two of our
campuses via SCP. After a while the connection just stalled out and
hung. The problem turned out to be SCP and SFTP interacting a bug in
the SACK (Selective Acknowledgment) algorithm used in Linux. We turned
it off on the
I have an SSH server that was set up for a client, and every time we
try to upload large files via SFTP or scp, the transfers speed quickly
slows to zero and gives a - stalled - status message, then
disconnects. Here is an example:
ftp put iTunesSetup.exe iTunesSetup.exe
Uploading
On Mon, Dec 21, 2009 at 7:06 PM, 唐建伟 myh...@gmail.com wrote:
I met the same as you, but always due to the bad network connection.
I should probably provide some more information, the server is a VMware
guest running CentOS 5.3. It's using the vmxnet driver for the eth0
connection. IPv6 is
Sean Carolan wrote:
On Mon, Dec 21, 2009 at 7:06 PM, 唐建伟 myh...@gmail.com
mailto:myh...@gmail.com wrote:
I met the same as you, but always due to the bad network connection.
I should probably provide some more information, the server is a VMware
guest running CentOS 5.3. It's
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