Site Support Team - Documentation
Xrootd Useful Information

Here you will find a list of twikis and commands to help you understand and troubleshoot Xrootd issues.

  1. General Info and Guides
  2. Instructions for Admins (Setup):
  3. List of Redirectors (hierarchical order):
    1. Global:
      • CERN
    2. Regional:
      • Nebraska/FNAL (US)
      • Paris/Bari/Pisa (Europe)
      • Beijing (Asia)
    3. Local
    4. Servers
  4. Monitoring Tests for Xrootd Infrastructure
  5. TFC Changes necessary for Xrootd
  6. Configuring Fallback Access
  7. xrootd-access and xrootd-fallback status of all Sites
  8. Link to test the mapping of a test file:
  9. Contact the redirector and verify if the cmsd is integrated properly with the rest of the federation.
    • The best way to check, if you know their xrootd endpoint:
      xrdcp -d 1 -f root://$HOSTNAME//store/mc/SAM/GenericTTbar/GEN-SIM-RECO/CMSSW_5_3_1_START53_V5-v1/0013/CE4D66EB-5AAE-E111-96D6-003048D37524.root - > /dev/null
      
      The following should also work:
      xrdcp -d 1 -f r root://cms-xrd-global.cern.ch//store/test/xrootd/$SITENAME//store/mc/SAM/GenericTTbar/GEN-SIM-RECO/CMSSW_5_3_1_START53_V5-v1/0013/CE4D66EB-5AAE-E111-96D6-003048D37524.root - > /dev/null
      
  10. Verify that the xrootd configuration of a site is working by accessing directly from the global redirector
    • access lxplus
      source /afs/cern.ch/cms/LCG/LCG-2/UI/cms_ui_env.sh
      voms-proxy-init -voms cms
      
      xrd cms-xrd-global.cern.ch
      help [to list available commands]
      
      existdir /store/test/xrootd/ [to check if directory exists]
      dirlist /store/test/xrootd/ [to list all directories with that path]
      
      [to check if a specific file exists]
      existfile /store/test/xrootd/T2_US_Florida/store/mc/SAM/GenericTTbar/GEN-SIM-RECO/CMSSW_5_3_1_START53_V5-v1/0013/CE4D66EB-5AAE-E111-96D6-003048D37524.root
      
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Topic revision: r6 - 2015-03-27 - JohnArtieda
 
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