Storage management - choice of HPSS
Need to “backend” the ODBMS
- Using a large scale media management system
- Because:
- “Tapes” are still foreseen to be most cost effective
- (May be DVDs in practice)
- System reliability not enough to avoid “backup copies”
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Unfortunately, large scale data archives are a niche market
HPSS is currently the best choice:
- Appears scale into the PetaByte storage range
- Heavy investment of CERN/Caltech/SLAC… effort to make HPSS evolve in directions suited for HEP
- Unfortunately, only supported on a couple of platforms
- A layer between the ODBMS and an HPSS filesystem has been developed: it is interfaced to Objectivity’s Advanced Multithreaded Server. This is one key to development of the system middleware.
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