• setup on lxplus

  • your account should be able to run athena "hello world" as discribed in the workbook ["https://twiki.cern.ch/twiki/bin/view/Atlas/WorkBookRunAthenaHelloWorld"]

  • login to lxplus
  • start athena

  #!PARSERNAME > source ~/cmthome/setup.sh -tag=12.0.4

  • start the grid

Edit conflict - other version:

• > source /afs/cern.ch/project/gd/LCG-share/sl3/etc/profile.d/grid_env.sh

Edit conflict - your version:

• > source /afs/cern.ch/project/gd/LCG-share/sl3/etc/profile.d/grid_env.sh

End of edit conflict

• > export LFC_HOST=lfc-atlas.cern.ch

  > export LCG_CATALOG_TYPE=lfc

  > voms-proxy-init

  • create a long term proxy (recommended for mc production, default 1 week)

  > myproxy-init

  • check with

  > myproxy-info

  • the long term proxy lies on "myproxy.cern.ch" and is automatically used by ganga
  • start dq2 (dataset mangagement)

Edit conflict - other version:

• > source /afs/usatlas.bnl.gov/Grid/Don-Quijote/dq2_user_client/setup.sh.CERN

Edit conflict - your version:

• > source /afs/usatlas.bnl.gov/Grid/Don-Quijote/dq2_user_client/setup.sh.CERN

End of edit conflict

• start ganga (4.2.7) as atlas user in graphical user interface with

Edit conflict - other version:

• > /afs/cern.ch/sw/ganga/install/slc3_gcc323/4.2.7/bin/ganga --config-path=GangaAtlas/Atlas.ini --gui

Edit conflict - your version:

• > /afs/cern.ch/sw/ganga/install/slc3_gcc323/4.2.7/bin/ganga --config-path=GangaAtlas/Atlas.ini --gui

End of edit conflict

• type "y" to create a default ganga config file ".gangarc"
• ganga should start
• open a second shell, and type

• > source ~/cmthome/setup.sh -tag=12.0.4

Edit conflict - other version:

• > source /afs/cern.ch/project/gd/LCG-share/sl3/etc/profile.d/grid_env.sh

Edit conflict - your version:

• > source /afs/cern.ch/project/gd/LCG-share/sl3/etc/profile.d/grid_env.sh

End of edit conflict

• > export LFC_HOST=lfc-atlas.cern.ch

  > export LCG_CATALOG_TYPE=lfc

  > voms-proxy-init

Edit conflict - other version:

• > source /afs/usatlas.bnl.gov/Grid/Don-Quijote/dq2_user_client/setup.sh.CERN

Edit conflict - your version:

• > source /afs/usatlas.bnl.gov/Grid/Don-Quijote/dq2_user_client/setup.sh.CERN

End of edit conflict

• go into a run directotory

Edit conflict - other version:

• > cd testarea/12.0.4/PhysicsAnalysis/AnalysisCommon/UserAnalysis/run

Edit conflict - your version:

• > cd testarea/12.0.4/PhysicsAnalysis/AnalysisCommon/UserAnalysis/run

End of edit conflict

setup on atlhltX (X=2,3,4)

• first you have to install ganga
• login into atlhltX and change to /usr1/scratch/userscratch/USERNAME
• you can download the ganga install script here
• or copy into your disk with

• > cp /afs/cern.ch/user/v/volkmann/public/ganga-install .

  • install 4.2.7 with options

Edit conflict - other version:

• > python ganga-install --prefix=/usr1/scratch/userscratch/USERNAME/Ganga/ --extern=GangaAtlas,GangaGUI,GangaPlotter

Edit conflict - your version:

• > python ganga-install --prefix=/usr1/scratch/userscratch/USERNAME/Ganga/ --extern=GangaAtlas,GangaGUI,GangaPlotter

End of edit conflict

• the install script shows the file to start ganga
• your account should be able to run athena "hello world"
• start athena

Edit conflict - other version:

• > source /usr1/scratch/userscratch/USERNAME/cmthome/setup.sh -tag=12.0.3

Edit conflict - your version:

• > source /usr1/scratch/userscratch/USERNAME/cmthome/setup.sh -tag=12.0.3

End of edit conflict

• start the grid

Edit conflict - other version:

• > source /afs/desy.de/group/grid/UI/GLITE-3_0_4/etc/profile.d/grid_env.sh

Edit conflict - your version:

• > source /afs/desy.de/group/grid/UI/GLITE-3_0_4/etc/profile.d/grid_env.sh

End of edit conflict

• > export LFC_HOST=lfc-atlas.cern.ch

  > export LCG_CATALOG_TYPE=lfc

  > voms-proxy-init

  • log with another shell into lxplus and create a long term proxy with "myproxy-init" as described above (myproxy-init at atlhltX fails)
  • start dq2

  > source /afs/ifh.de/project/grid/dq2/setup.sh

  • uncomment the line "MyProxyServer = myproxy.cern.ch" in the ganga config file "~/.gangarc"

  • start ganga for atlas with graphical user interface

Edit conflict - other version:

• > /usr1/scratch/userscratch/USERNAME/Ganga/install/slc3_gcc323/4.2.7/bin/ganga --config-path=GangaAtlas/Atlas.ini --gui

Edit conflict - your version:

• > /usr1/scratch/userscratch/USERNAME/Ganga/install/slc3_gcc323/4.2.7/bin/ganga --config-path=GangaAtlas/Atlas.ini --gui

End of edit conflict

• open anther shell in atlhltX, start athena, grid, dq2, change into run directory (as discribed before)

hello world with Ganga in graphical user interface

• you should contain "HelloWorldOptions.py" in your run directory

• click on "new" in the ganga window to create a new job
• click on application and change from "Executable" to "Athena" in the drop down box on the right side
• expand the application menu

• click on "option file" and browse on your disk to "HelloWorldOptions.py" to load it into ganga

• click on "max events" and write "10"
• click on "backend" and change from "local" to "LCG"
• click on "submit" button
• inspect the status of the job from "submitted", "running" to "completed", hopefully not to "failed"
• retrieve the output by clicking on the job with the right button and choose "retrieve output", click on the file you want to read
• you can also inspect input/output directly in ~/gangadir/workspace/...

generating events (1. step in the chain)

• the normal way would be to download in the second shell the atlas production transform archive, actual releases can be found here

Edit conflict - other version:

• > wget http://cern.ch/atlas-computing/links/kitsDirectory/Production/kits/AtlasProduction_12_0_31_08_noarch.tar.gz

Edit conflict - your version:

• > wget http://cern.ch/atlas-computing/links/kitsDirectory/Production/kits/AtlasProduction_12_0_31_08_noarch.tar.gz

End of edit conflict

• by default you have to create minimum 5000 events, but for educational test and to save time, we create 3 events,
• creating more than 3 is simple and strait forward (but takes longer time)
• you can change the default of 5000 events as discribed here
• to save time download a file already changed down to 3 events (default is only changed for 1 example: "DC3.005711.PythiaB_bbmu6mu4X.py")

Edit conflict - other version:

• > cp "/afs/cern.ch/user/v/volkmann/public/AtlasProduction_12_0_31_8_noarch.tar.gz" .

Edit conflict - your version:

• > cp "/afs/cern.ch/user/v/volkmann/public/AtlasProduction_12_0_31_8_noarch.tar.gz" .

End of edit conflict

• click on new in the ganga window
• change "application" to "AthenaMC"
• type into atlas release "12.0.31"
• type into eventgen_job_option "DC3.005711.PythiaB_bbmu6mu4X.py"
• type into firstevent "1"
• make sure that mode is "evgen"
• type into number_events_job "3"
• type into process_name something meaningful like "bbmu6mu4X"
• type into production_name another meaningful thing like "bphys"
• change the random seed to a 9 digit number
• type in a 6-digit run number like "000001"

• browse the transform script "AtlasProduction_12_0_31_8_noarch.tar.gz" into ganga

• type into transform_script "csc_evgen_trf.py"
• click on backend and choose "LCG"
• expand LCG and choose one of the following computing elements

• tbn20.nikhef.nl:2119/jobmanager-pbs-qlong lcg-ce0.ifh.de:2119/jobmanager-lcgpbs-atlas grid-ce1.desy.de:2119/jobmanager-lcgpbs-atlas
  • (you find all by typing "lcg-infosites --vo atlas ce" into the shell)
  • click on outputdata and select "DQOutputDataset"
  • click on splitter and choose "AthenaMCSplitterJob"
  • click on numsubjobs and type "3"
  • click on nsubjobs_inputfile and type also "3"
  • submit the job
  • inspect the output in the other open shell with dq2 if the 3 jobs reach "completed" (sometimes dq2 doesn't work at atlhltX)
  • you find the output datasetname in gange
  dq2_ls -g datasetname
  • you should see the three root files (each has 1 event in this example)

simulating and digitizing events (2. and 3. step in the chain)

• create a new job, and choose again "AthenaMC" in the application form
• type into the form the atlas_release, prozess_name, production_name and run_number of the previous generation job
• type into first_event "1"
• type into number_events_job "1"
• choose a 9-digit random seed

• browse the job transform archieve again into the job "AtlasProduction_12_0_31_8_noarch.tar.gz"

• type into transform_skript "csc_simul_trf.py"
• choose in backend "LCG" and type a ce into it (as previously mentioned)
• click on inputdata and choose "DQ2OutputDataset" and expand the menu
• type into datasetname the name of the dataset from the previous job
• click on outputdata and choose "DQ2OutputDataset"
• choose in Splitter "AthenaMCSplitterJob" and expand
• type into n_subjobs_inputfile "1"
• type into number_input_jobs "3"
• type into numsubjobs "3"
• submit the job and inspect the result with dq2_ls -g datasetname

reconstructing events (4. step in the chain)

• everything remais the same to simulation exept:
• change mode to "recon"
• type into transform_skript "csc_reco_trf.py"
• type into the inputdata the corresponding name of your simulation dataset
• check the output dataset with "dq2_ls -g datasetname"
• download the dataset with "dq2_get datasetname" and inspect with root

links

• http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/BPHYSICS/underlying/grid/gangainstructions.htm

• http://gridui02.usatlas.bnl.gov:25880/server/pandamon/query?overview=dslist

• https://twiki.cern.ch/twiki/bin/view/Atlas/AtlasEvgenTrf

• www.cern.ch/ganga