It would be useful for debugging to add the job id in the temporary directory prefix.

Maxime's suggestion:
http://lists.nongnu.org/archive/html/maposmatic-dev/2012-04/msg00418.html
"""
My suggestion is to have an optional jobid field in the
RenderingConfiguration (ocitysmap2/__init__.py), set my MapOSMatic in
scripts/render.py when creating the RenderingConfiguration, but not
necessarily by OCitySMap (like in ocitysmap2-render for example).

Then, you simply do:

 tmpdir = tempfile.mkdtemp(prefix='ocitysmap-%s' %
   (config.jobid and '%d-' % config.jobid or ''))
"""

I'm not sure to fully understand Maxime's proposal but I think the job id should always be included in temp prefix.