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1 How to use Tier2 at KNU

2 Getting Account

3 DOE Certificate

4 CMS User Registration

5 SiteDB registration

6 KNU Tier 2 Login

7 CMS Installation

bash
  export VO_CMS_SW_DIR=<installation-directory>
tcsh
  setenv VO_CMS_SW_DIR <installation-directory>
  source $VO_CMS_SW_DIR/cmsset_default.sh
  cd <working-directory>
  scramv1 project CMSSW CMSSW_x_y_z

8 CRAB Installation

https://twiki.cern.ch/twiki/bin/view/CMS/SWGuideCrab#CRAB_on_line_manual_and_tutorial
'how to get crab' - get latest CRAB tar ball file to <working-directory>
cd <working-directory>
tar vfx CRAB_x_y_z.tgz
cd <working-directory>/CRAB_x_y_z
./configure

9 Setting Environment

setenv VO_CMS_SW_DIR <installation-directory(=/opt/exp_soft/cms)>
source $VO_CMS_SW_DIR/cmsset_default.sh
 
CMSSW env
  must set under the CMSSW_x_y_z directory
  cd CMSSW_x_y_z
  cmsenv (= eval `scramv1 runtime -csh`)
CRAB env
  source <working-directory>/CRAB_x_y_z/crab.csh

10 Starting GRID Job Submission

Copy CRAB_x_y_z/python/crab.cfg and <analysis file(***.py)> 
into <working-directory>/CMSSW_x_y_z/src/
File edidting
  Check that an input file name (***.py) must be same as a file name in crab.cfg.
  'Names' of input file and output file in crab.cfg and ***.py must be same.
  '# of events' must be same.

  Grid initialization
    grid-proxy-init
 
  Crab  commands 
    ex) Crab -create -submit
        Crab -status  
        Crab -getoutput 

11 Wiki Getting started