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Re: scp slow against cygwin sshd
Igor Pechtchanski wrote:
> Does upgrading to the latest Cygwin (1.5.3-1) and openssh (3.6.1p2-2)
> solve this problem? It's usually a good idea to upgrade to the latest
> version before problem reports.
Well, yes. But Cygwin 1.3 just works. Anyway, I upgraded to the new 1.5 and
nothing changed.
> If the latest Cygwin and openssh don't solve this problem, try running
> "scp -vvv" and see if that provides any clues. There's also strace ("man
This shows TCP window size(?) related adjustments:
debug2: channel 0: window 49152 sent adjust 81920
20m 0% 144KB 144.1KB/s 02:14 ETA
debug2: channel 0: window 49152 sent adjust 81920
20m 0% 192KB 96.0KB/s 03:21 ETA
debug2: channel 0: window 49152 sent adjust 81920
But these adjustments can also be watched when scp'ing from a Solaris 8
(Server - openssh) to Cygwin (client - scp):
debug2: channel 0: window 57344 sent adjust 73728
debug2: channel 0: window 57344 sent adjust 73728
debug2: channel 0: window 57344 sent adjust 73728
> strace"), which can tell you where the time is going. Please make an
I had a first look at the strace output. Mmh. Just too much. I'll another
look later.
> effort to understand and analyze the strace output before dumping gobs of
> data to this list.
Sure, I won't :)
Cheers,
Mario
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