Storage management
Large scale data archives are a niche market
We need to interface our ODBMS with a large scale media management system
HPSS is currently the best choice
Notes:
Large scale data archives are a niche market
Continued reliance on Tapes is foreseen
Slow evolution of costs and technology over time.
Reliability not enough to avoid “backup copies”
Need to interface the ODBMS with a large scale media management system
Have chosen HPSS - appears to have scalability into the Petabyte range
HPSS far from being multi-platform, and not yet robust enough for production use
Heavy investment of CERN/Caltech/SLAC… effort to make HPSS evolve in directions suited for HEP
Have developed a layer between the ODBMS and the filesystem that restores newly requested databases from tertiary HPSS storage when required