DQM tricks

From lxplus, do:
cmsrel CMSSW_9_4_0
cd CMSSW_9_4_0/src/
cmsenv
dqm-access -w -c -f '/PixelPhase1/Phase1_MechanicalView/PXBarrel/digi_occupancy_*_PXLayer_*' -e "match('/ZeroBias1/Run2017G-PromptReco-v.*/DQMIO',dataset)" -s https://cmsweb.cern.ch/dqm/offline/data/json

dqm-access --help | less

The last command can be generalized, e.g.:

• If you want to fetch histograms from all periods, use Run2017.* instead of Run2017G (this is a plain regular expression, you can assemble the one you like)
• If you are interested in the forward too, I'd suggest making a second query (if you repeat the same command with a different histogram target, the output file in your local directory will be overwritten...)
• if you are interested only in some specific run, you could use: -e "run == XYZ and match...."