Conditions Data Base

Naples group has the responsibility to coordinate the software developments for the conditions database of the CMS experiment, i.e. the database who holds all the calibrations of the various subsystem and the working condition of them and needed offline for the reconstruction. We are also involved in the development of central tools to populate the condition database. A sketch of the CMS condition database architecture is pictured above.

The CMS condition databases are based on the ORACLE technology. The offline database are populated using a framework, called PopCon, written in C++. Naples group played a major role in the development of PopCon and the PopCon monitor, a web tool to check the correctness of all the transactions, to trace the errors, and guide the users to take the correct action in case of problems.

References

• PopCon monitoring: web application for detailed real-time database transaction monitoring, proceesings of DMS 2009, San Francisco, USA, 10-12 Sep 2009
• First experience in operating the population of the condition database of the CMS experiment, proceedings of CHEP '09, Prague, Czech Republic, 21-27 Mar 2009
• CMS Database project twiki page.
• PopCon twiki page.