Abstract
The LHCb readout system is composed of hundreds of electronics boards, an event-building network based on Gigabit Ethernet switches and an online processing farm. The Experiment Control System (ECS) configures the system from the Online Configuration database. This database contains device parameters, the hierarchical structure and the connectivity information of the system. In addition the switches in the event-building network require routing tables that have to be generated according to the connectivity. We apply the Entity Relationship model to represent the connectivity of the system. SQL code builds the routing tables using the information contained in the Configuration database.
Highlights
THE LHCb experiment [1], [2] is one of the four experiments at the CERN Large Hadron Collider (LHC)
We focus on an effective way to configure the LHCb Online Data Acquisition (DAQ) network using this database
The Configuration database is a central database based on Oracle technology (Oracle 9i) [16] because it is well supported at CERN
Summary
THE LHCb experiment [1], [2] is one of the four experiments at the CERN Large Hadron Collider (LHC). The LHCb experiment is situated at one of the places around the LHC ring where the beams collide. The LHCb detector is designed to exploit the large number of b-hadrons produced at the LHC in order to make precision studies of CP asymmetries and of rare decays in the B-meson systems. The Online Data Acquisition (DAQ) system collects data from the front-end electronics and transfers them to a CPU farm for the execution of the software trigger algorithms. Details about the DAQ system can be found in [4]. We focus on an effective way to configure the LHCb Online Data Acquisition (DAQ) network using this database
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