[Halld-offline] ccdb_reduce.py

[David Lawrence]

Hi All,

  I’ve committed a new utility for reducing a CCDB sqlite file to a minimal size based
on a run range, variation, and date/time. The intent is to make a more compact 
version that can be included in a container without significantly increasing its
size. If used to produce a sqlite file for the default variation in the 30000-39999
run range, it results in an 18MB sqlite file (compared to a 373MB starting file).
Much of the reduction is in dropping old magnetic field and material maps that are
not used by modern sim-recon.

The tool was added to the hd_utils repository. You can see it directly here:

https://github.com/JeffersonLab/hd_utilities/blob/master/CCDButils/ccdb_reduce.py


There are some known limitations (see comments at top of script). 
Let me know if you have any issues.

Regards,
-David

-------------------------------------------------------------
David Lawrence Ph.D.
Staff Scientist, Thomas Jefferson National Accelerator Facility
Newport News, VA
davidl at jlab.org
(757) 269-5567 W
(757) 746-6697 C



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