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Re: scp/ssh between two cygwin installations very slow
- From: Bernhard Ege <bernhard at ege dot cc>
- To: cygwin at cygwin dot com
- Date: Mon, 25 Apr 2005 21:45:56 +0200
- Subject: Re: scp/ssh between two cygwin installations very slow
- References: <426D28E3.firstname.lastname@example.org>
Bernhard Ege wrote:
I am trying to copy an 800MB file from my pc to my laptop. The pc has
cygwin and cygwins sshd running and from the laptop I use the scp
command to copy the file.
Result: 190kB/s with low (1-5%) cpu usage on both machines.
Expected result: at least 2-3MBps with somewhat higher cpuusage on both
Doh. I completely forgot that in my .ssh/config I had ssh call a script
using the ProxyCommand. That command is a shell script that detects
which network I am connected to (company or my own) and uses a tunneling
ssh command to the destination if on the company network or a direct
connection using "connect" if on my own network.
The connect command is a fairly simple program that redirects
stdin/stdout to a host:port. This way, I can either use a ssh to
host:port if tunneling is required to connect to host:port if not.
The problem is that cygwin has a very low throughput using the script
with the connect command. I guess it could be related to the slow pipe
problem mentioned earlier (but was supposedly fixed).
I have tried without the ProxyCommand and the speed returned to an
I hope Cygwin can be fixed so the speed returns to normal :-)
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