Slide 9 of 24
Notes:
Commercial ODBMS
embody hundreds of person-years of effort to develop
tend to conform to standards
offer rich set of management tools & language bindings
At least one commercially available ODBMS - Objectivity - appears capable of handling LHC data volumes.
Very large Objectivity databases can be created as “Federations” of very many smaller databases, which themselves are distributed and/or replicated amongst servers on the network
I/O performance, overhead and efficiency are very similar to traditional HEP systems (“Zebra”, “BOS” with Fortran-77)
The best choice right now in terms of
Architecture (federations, data replication, fault tolerance)
OS support (NT, Solaris, Linux (imminent), Irix, AIX, HP-UX, etc..)
Language bindings (C++, Java, [C, SmallTalk, SQL++ etc.])
Commitment to HEP as target business sector
Close relationships built up with the company, at all levels from the CEO “down” to the engineers
Attractive licensing schemes for HEP (e.g. CERN and SLAC, BaBar)
