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Re: scp/ssh between two cygwin installations very slow
- From: Christopher Faylor <cgf-no-personal-reply-please at cygwin dot com>
- To: cygwin at cygwin dot com
- Date: Mon, 25 Apr 2005 15:49:00 -0400
- Subject: Re: scp/ssh between two cygwin installations very slow
- References: <426D28E3.4080303@ege.cc> <426D48F4.5040908@ege.cc>
- Reply-to: cygwin at cygwin dot com
On Mon, Apr 25, 2005 at 09:45:56PM +0200, Bernhard Ege wrote:
>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
>>machines.
>
>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
>acceptable 1.5MBps.
>
>I hope Cygwin can be fixed so the speed returns to normal :-)
Yep. We'll get right on fixing that problem where fairly simple
programs which redirect stdin/stdout to a host:port cause reversions in
behavior of the "slow pipe" problem which was supposedly fixed.
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