ODBMS for LHC detector simulation Original Research Article

One of the new and powerful features of the GEANT4 detector simulation toolkit is the newly designed “Hits + Digitization” category. Using this, the user can easily simulate responses of his/her own detector setup. On the other hand, it is well known that a huge number of simulated events are essential to large scale high energy experiments. Simulated detector responses are one candidate for the heavy use of an ODBMS. Following the first attempt to merge the efforts of CERN RD44 and CERN RD45, we report on the use and performance of ODBMS persistency for LHC detector simulation. The main topics are (1) design of persistent “hit” and “trajectory” classes, (2) use of the ODBMS for “hits” simulated data, and (3) the benchmark performance.