Some Results

The major tests:
A basic 4 Leptons analysis (ex1 ex2) using different number of workers.
Comparison between runing COMPILED / INTERACTIVE modes.
Error report conclusions

• When a large number of workers (more than 100 - 120) are started the location of the files together with the setting up of the parallel session takes long time, and many times crash, skipping events, or simply removing some machines from the farm.

    Compile vs CINT(Interpreted mode)

    COMPILED                                                                    CINT

       16 workers
         Organized vs Random  Tree [Datasetiles]                                                                 

ORGANIZED                                                                  RANDOM

   

  80 workers

Datasets :

The test were done using the following datasets, with approximately  4.2~Million events, 845 Files of about 68GB. 

trig1_misal1_csc11.005300.PythiaH130zz4l.recon.NTUP.v1300300

trig1_misal1_csc11.005980.Pythiazz4l.recon.NTUP.v13003003

trig1_misal1_mc12.005177.AcerMC_Zbb_4l.recon.NTUP.v13003004

trig1_misal1_mc12.005211.ttbarMcAtNLO4Leptons.recon.NTUPM.v13003004

trig1_misal1_mc12_V1.005802.JF17_pythia_jet_filter.recon.NTUPM.v13003002
 

The hardware structure: 1 Master + 50 data servers.
80 workers per session