CTA deployment meeting

600/R-001 (CERN)



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Michael Davis (CERN)
    • 2:00 PM 2:10 PM
      Migration of CASTOR home directories 10m
      • OTG0064878 Closure of CASTOR home directories
      • #390 Migration of CASTOR user accounts to CTA
      • Experiment data has been separated from user data as far as possible. New fileclasses to distinguish between primary accounts, secondary accounts and service accounts. do_not_migrate fileclass for data which should probably be deleted.


      • 971 CASTOR users. Around 1/3 of them have <100 files.
      • total count of files: 61,765,238, total size: 4.9 PB
      • 7 users with >100 TB. 246 users with >1 TB.
      • Only around 20 users who wrote data to CASTOR in the last year. These seem to be mainly experiment analysis or MC use cases.


      1. Clean up/delete unneeded files where possible
      2. Migrate users with <1 TB to CERNBox. Currently if we total up files for all users with <1 TB it comes to 76 TB.
      3. Users with >1TB, 2 options:
      4. let them negotiate a higher limit
      5. leave their data on tape and migrate it to CTA (last resort)

      To Do

      • Need a policy for users who have left CERN and left files behind in CASTOR.
    • 2:10 PM 2:20 PM
      CASTOR Backup 10m
      • #307 Migrate CASTOR Backup use cases to CTA

      Use cases

      • EOS archive tool Migrated to CTA
      • Messaging
      • Oracle
      • EOS
      • Hadoop
      • AFS (#282)
      • Zvault (Microelectronics and NFS Filer)
    • 2:20 PM 2:30 PM
      Cold Data 10m
      • NA48 - #341 - repack underway
      • r_public_misc: covers most of the rest of the small experiment use cases (single copy). Repacking will separate from r_public_user.
      • r_public_user_[1,2] is other small experiment data (not user data despite the name of the tapepool), dual copy. Merged with r_lep_data_[1,2].
    • 2:30 PM 2:35 PM
      AOB 5m
      • IT-ST-TAB round table