Randoms Discussion Outcome
Karl, Toby, Richard

Decided: 

• use the CLHEP HepRandom static engine and reseed all the package seeds each event from one service.
• use Gaudi Tools to access the engine copies by DLL
  • each DLL using randoms (eg CalDigi, TkrDigi, etc) gets its own copy
  • use Gaudi tool per package to access the engine and make a pointer to it available
  • define base tool to accessing engine; extend the interface to create a uniquely named Tool per DLL
• create a service (or algorithm) to seed the engines
  • use incident service to trigger call before algorithms' execute()
  • at service init time, search for all randoms Tools and create a list of them
  • set the engines
  • seed the engines per event
• modify McHeader to have two keys to identify an MC event uniquely. Run number and a sequence (much like event number). This keeps it separate from the Event run/event numbers which are maintained by Trigger.

Last Modified: 2002-09-11 19:41:58 -0700