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Date: Thu, 05 Jan 2006 19:37:22 -0500
From: Ken Senior <seniork AT gmail DOT com>
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To: Brett Serkez <techie AT serkez DOT net>
CC: cygwin AT cygwin DOT com
Subject: Re: cygwin and rsync
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Thanks Brett for the quick reply.  The multiple -v is a handy thing to
remember. 

In fact this is not my problem though.  It looks like the listing of
files just hangs midstream.  Some local directories are created and
sometimes a few files make it too, but it just hangs.  For example:

  .
  .
  .
recv_generator(MATLAB/wavelab/Papers/SpinCycle/cspinfo03.m,8425)
recv_generator(MATLAB/wavelab/Papers/SpinCycle/cspinfo04.m,8425)
recv_generator(MATLAB/wavelab/Papers/SpinCycle/cspinfo05.m,8425)

None of these files were actually transferred and there are plenty more
of these similarly-named files well beyond cspinfo05.m, leaving me no
additional info.  Moreover, there are no special characters or spaces in
these files to suggest a problem in the file or directory name. Also,
each launch seems to stop at a different directory and file.  Bizarre. 
I don't know how to use strace or I'd try that.  -K


Brett Serkez wrote:

>Ken,
>
>I run rsync both Windows and Linux to Linux, Linux always being the
>'server'.  In my case I found the hang to be up front, before secure
>shell even attempted to access the network and also in my case changing
>from a local socket to a local pipe resolved the issue:
>
>http://cygwin.com/ml/cygwin/2005-12/msg01096.html
>
>Have you tried adding more v switches to your command line, like:
>
>rsync -avvz user@[REMOTE/Windows]:/path/to/stuff/ dest/on/local/
>rsync -avvvz user@[REMOTE/Windows]:/path/to/stuff/ dest/on/local/
>rsync -avvvvvz user@[REMOTE/Windows]:/path/to/stuff/ dest/on/local/
>
>Each time you a a v switch, it increases the debug output, I think up to
>4 or 5.  This would help to narrow the issue as you'll see how far your
>getting in the protocol which might help narrow the problem.
>
>Is it at all possible to go the other way?  I know if you are willing to
>build your own rsync with the socketpair() called disabled it will work.
>
>Brett
>
>
>
>On Thu, 05 Jan 2006 18:46:04 -0500, "Ken Senior" <seniork AT gmail DOT com>
>said:
>  
>
>>Hi.
>>
>>I posted the message listed below to the rsync list, but one of the
>>readers there suggested I post it here indicating that there's a
>>known/common problem in cygwin of data loss in local pipes (whatever that
>>means I am not sure).  I find my rsync command hanging, whether or not I
>>run it over SSH, that is with our without the --rsh='ssh -l username'.  I
>>searched and read the archived mail on the cygwin list archives and
>>though there are six pages of "rsync hanging" issues, I didn't find much
>>help.  Unfortunately, the logs are saying nothing and I couldn't get the
>>strace business to work---no doubt because I've never used it.  Can
>>anyone here suggest anything?  -Thanks
>>
>>
>>
>>----
>>
>>I just installed the latest version of cygwin (1.5.18-1) from
>>www.cygwin.com on my Windows XP machine.  I have had a lot of success
>>with rsync between Linux boxes but after many months of mixed results I
>>have had much less than perfect luck with rsync from a Linux box [LOCAL]
>>to a windows box [REMOTE]---that is, constant hanging.
>>
>>I have tried to follow the rsync FAQ on using strace to figure out why
>>things are hanging, but I'm not understanding what gets launched where
>>and in what order.  I created the rsync-debug script (below) as
>>suggested, but it's unclear how to use it.  Would you guys mind giving a
>>step-by-step on how to get this strace info?
>>
>>For example, let's say on [LOCAL/Linux] I want to issue the command:
>>
>>rsync -avz user@[REMOTE/Windows]:/path/to/stuff/ dest/on/local/
>>
>>Do I first launch the rsync-debug on [REMOTE/Windows]?  Do I modify the
>>above command in order to get things rolling?
>>
>>Cheers and thanks in advance.
>>
>>-Ken
>>
>>----
>>
>>rsync-debug script:
>>
>>ulimit -c unlimited
>>strace -f rsync --daemon --no-detach 2>/tmp/rsync-$$.out
>>
>>
>>
>>
>>
>>--
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>>
>>    
>>
>----------------------------------------------------------------
>Brett C. Serkez, Techie
>
>
>  
>



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