[Halld-offline] ccdb_reduce.py

David Lawrence davidl at jlab.org
Tue Sep 5 10:13:28 EDT 2017

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:


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


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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