DRAFT!!! CASTOR Tape Subsystem Twiki


The Tape Subsystem comprises all functionality directly dealing with storage on, and management of magnetic tapes (volumes), tape servers and drives and tape solos (libraries). This ranges from low-level tape positioning and access over disk-to-tape copying up to the management of tape drives and queues and the volume database.

Team and Contributors

The members of the development team (hosted in IT/DM/SGT) work in close collaboration with the tape operations team (IT/FIO/TSI) who are the main source for operational requirements.

  • Team members:
    • Steve Murray IT/DM/SGT (investigations; overall architecture coordination; rtcpd and taped; VDQM2;
    • Giulia Taurelli IT/DM/SGT (Repack2; rtcpclientd; Recall/Migration policy framework)
    • German Cancio IT/DM/SGT (investigations; planning)
  • Contributors:
    • Vlado Bahyl IT/FIO/TSI
    • Tim Bell IT/FIO/TSI
    • Charles Curran IT/FIO/TSI
    • Arne Wiebalk IT/FIO/TSI

Work Areas

Tape and remote copy daemons (taped, rtcpclientd/rtcpd)

  • Goals:
    • Acquire knowledge on tape technology: Software, Hardware, Media
    • Understand current performance limitations in both tape write and read operations
    • Address operational recoverability and reliability requirements and their impact on the tape data structure and format
    • Re-engineer existing old/legacy code base using standard CASTOR development principles and foundation libraries, taking into account the above, following a low-risk migration path


  • Goals:


Recall/migration/stream policy framework

(link to) requirements




Work Breakdown Structure (WBS)


  • (with FIO/TSI) (agenda / notes)


-- GermanCancio - 12 Aug 2008

This topic: DataManagement > CastorTapeSubsystem
Topic revision: r1 - 2008-08-12 - GermanCancio
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