Parallel

Current time : 18 minutes for a -a run. Requires some additionnal testing that should be carried next week
the L in ELK stands for logstash, not logbook. 
If you can show me why Logbook is better than 
python's standard library (you know, the thing handled by te people who maintain python) https://hg.python.org/cpython/file/3.4/Lib/logging/handlers.py#l1275
then I might start to use it