On Sep 27, 2011, at 9:20 , Jan 
 wrote:

> Hello,
> 
> I've got 2 batch processes, one compile CHUI files and another compiling 
> WIN32 files. They use the same working copy and update the working copy 
> before starting. 
> I wonder if this is safe: if the 2 update commands run at the same time, 
> will this cause issues? So far it appears to work just fine, but I'd 
> rather be sure than sorry. 
> 
> 
> ps.: Both compilers run on the same machine and just invoke svn.exe 
> --non-interactive --accept theirs-full --depth infinity update 
> c:\workingcopyname, so there won't be a problem with incompatible clients, 
> the client is the same. I just wonder if I could have problems with a 
> locked working copy or something like that. The working copy is only used 
> for compiling, there are never any changes in the working copy. SVN Server 
> & Client: 1.6.17, OS WIN32, server = Apache.


Subversion operations that modify the working copy, such as update, use
a Subversion-internal "administrative" locking to ensure that the operations
don't collide.

It's possible that build process B runs an update while build proces A is
already compiling.  Then the effective source code of build A might
include files from different revisions, which is difficult to reproduce.

Regards,
Steve

--
Stephen Butler | Senior Consultant
elego Software Solutions GmbH
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