This is a simple comparison code to validate the reprocessing step on the Open Data VM by comparing the resulting file (newly rereconstructed from the RAW data sample available on the Open Data Portal) and the original AOD (also available on the Open Data portal). It loops over different physics objects (tracks, electrons, muons, photons, jets, taus and missing et) and fills histograms with P, pt, eta and phi of these objects.
The new AOD can be reprocessed from RAW with minor modifications (global tag, input file, commenting out unnecessary steps) to the configuration file which is recorded together with the original AOD file on the Open Data portal (http://opendata.cern.ch/record/24). See https://github.com/cms-opendata-validation/recotest for the updated configuration file and instructions.
By default, this code reads the original AOD (see demoanalyzer_cfg.py).
Run this code in CMS Open Data VM [http://opendata.cern.ch/VM/CMS/2011]
cmsrel CMSSW_5_3_32
cd CMSSW_5_3_32/src
cmsenv
mkdir WorkDir
cd WorkDir
git clone git://github.com/cms-opendata-validation/2011-minimumbias-compare-rereco.git
cd 2011-minimumbias-compare-rereco
scram b
ln -sf /cvmfs/cms-opendata-conddb.cern.ch/FT_53_LV5_AN1_RUNA FT_53_LV5_AN1
ln -sf /cvmfs/cms-opendata-conddb.cern.ch/FT_53_LV5_AN1_RUNA.db FT_53_LV5_AN1_RUNA.db
ls -l
ls -l /cvmfs/
cmsRun demoanalyzer_cfg.py