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LHCb Online Configuration Database

LHCb Online Configuration Database. Lana Abadie, CERN PhD student from University Pierre & Marie Curie (Paris VI) , Laboratoire SAMOVAR CHEP04, Interlaken. System overview. Operator. Experiment Control System (ECS). LHCb configuration database. PVSS (SCADA). Experimental

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LHCb Online Configuration Database

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  1. LHCb Online Configuration Database Lana Abadie, CERN PhD student from University Pierre & Marie Curie (Paris VI) , Laboratoire SAMOVAR CHEP04, Interlaken

  2. System overview Operator Experiment Control System (ECS) LHCb configuration database PVSS (SCADA) Experimental Equipment

  3. Objectives & requirements • Store information about all controllable devices • their properties • the links between them • their hierarchy • Keep necessary information for the ECS • to configure equipment • to operate the experiment • to monitor the system • Database design key issues • schema • completeness • performance • maintenance

  4. DATABASE SCHEMA

  5. Timing & Fast Control (TFC) dataflow Information from the schema List of devices Connectivities between devices

  6. Use cases • Collect use cases : Given a VELO card, find a free readout supervisor and determine the routing table of the TFC switch • List the keywords : device type, device, link, path... • Define them: a link is a cable between a device output number and a device input number • Find connections between keywords: a path is a sequence of links

  7. Entity relationship model • Find the type of relation between tables Link +LinkID +Switch Name From +Port Number From +Switch Name To +Port Number To +Type of link Device Type +device type name +nbr of input port +nbr of output port +device description Path +PathID +Link Device +Device Name +Device type +Status 2 1 • Convert them into constraints Link +Switch_LinkID (pk) +Switch_From +Port_nbr_from +Switch_to +Port_nbr_to +link_type (fk) ref Link Type(link nbr) + bidirectional_used + Unique(Switch_From, port_nbr_from) + Unique(Switch_to, port_nbr_to) + Switch_From, Port_nbr_from (fk) ref Port(switch name,nbr,in_or_out=‘out’) + Switch_to, Port_nbr_to (fk) ref Port(switch name,nbr,in_or_out=‘in’) Device +Device Name (pk) +Device type (fk) ref. Device type(devtype) +Status Device Type +devtype name (pk) +nbr of input ports +nbr of output ports +device description Path + PathID (pk) +link1 +link2… only fixed paths

  8. DATABASE IMPLEMENTATION

  9. Implementation features • Use of Oracle technology • Use of ProC/C++ to access the database and C/C++ to encapsulate the SQL and PL/SQL statements to communicate with PVSS • Use of JCOP configuration database tool • Implementation of a tool (cdbVis) to edit and navigate through the database in Python • Use of CVS to keep versions of projects and softwares

  10. Integration of theJCOP configuration database tool • Joint Control Project: offers common tools and framework for PVSS • Ensure compatibility between JCOP tables and LHCb tables • Avoiding redundancy in the tables: • JCOP tables contain device properties • LHCb tables store connectivity and hierarchy information • Adaptation of JCOP configuration database panels

  11. Communication : PVSSSystem PVSS Libraires & Tools provided by JCOP Configuration DB fw_recipes fw_device fw_com ponents fw_device_ properties fw_recipes _properties PL/SQL scripts device LHCb tables tfc_path

  12. Navigator editor tool : cdbVis Display the connectivities of a selected device on its inputs and outputs View of a path from the readout supervisor to the Throttle

  13. Ex. of concrete implementation : TFC system

  14. Physics trigger Local trigger (Optional) L0 / L1 L0 / L1 L0 / L1 Clock Clock Clock Clock Readout Supervisor 0 Throttle Switch TFC Switch Readout Supervisor 1 Readout Supervisor 3 Readout Supervisor 2 VELO FE ST FE OT FE RICH FE ECAL FE . . . TFC requirements • select subdetectors and • an activity • get the connectivities • between subdetectors and • TFC switch Readout Supervisor 1 List of activities Physics • List of free readout supervisors • and allocate one TFC Switch • save/load activities into/from • the conf. DB VELO FE ST FE OT FE

  15. Conclusion • Design schema for TFC and DAQ tables completed • Production TFC control system (PVSS) now uses the configuration database Future work • Table Design for LHCb other subdetectors • Extension of the cdbVis functionalities • Design an API to enable clients to interact with the database

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