Help with choice of suitable Architecture

[Kent Johnson]

Rob Cowie wrote:
> I agree with the sentiments that a single XML file is not the way to go
> for storing data that may be accessed concurrently. However, my hands
> are tied.

You might like to see the thread "write to the same file from multiple processes at the same time?" 
for a preview of the issues this raises.
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/475d065fa7871e63/c2fc42fefe114d38?hl=en#c2fc42fefe114d38

Kent