1. Handling online information in the LHCb experiment
Carmen Barandela (CERN)
On behalf of the LHCb Online Group

2. LHCb Experimental Equipment
LHCb ONLINE DB
Conf.
LHCb Experimental Equipment DB
...
...
PVSS
PVSS
PVSS
PVSS
PVSS
Arch.
PVSS
PVSS
PVSS
PVSS
...
...
Cond. .
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Maria del Carmen Barandela Pazos

3. CONTENT Configuration DB:
All data needed to configure the HW or SW for the various running modes
Ex.: HV V0 Settings, Pedestal settings, trigger settings, etc.
PVSS Archive:
All monitoring data read from HW for monitoring and debugging of the Online System
Ex.: HV Vmon Readings, temperatures, pedestal readings, etc.
Conditions DB:
A subset of the monitoring data read from HW if it is needed for Event processing (prob. packaged differently)
Ex.: HV Vmon Readings if changed by more than n Volts
Some configuration data once it has been used
Ex.: Trigger settings used by a particular run
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Maria del Carmen Barandela Pazos

4. Information Flow
Conf. DB
If needed for next run settings
Configuration settings for a running mode
Experimental Equipment
PVSS
Monitoring data
PVSS Arch.
If Archive On
If Passes Conditions filter
Cond. DB
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Maria del Carmen Barandela Pazos
Information needed by the online hw & sw components, like electronics boards, high voltage and low voltage power supplies and trigger algorithms, to be configured.
Information needed by the online hw & sw components, like electronics boards, high voltage and low voltage power supplies and trigger algorithms, to be configured.
Information needed by the online hw & sw components, like electronics boards, high voltage and low voltage power supplies and trigger algorithms, to be configured.
Information needed by the online hw & sw components, like electronics boards, high voltage and low voltage power supplies and trigger algorithms, to be configured.

5. Conclusions
Data distributed to the system through different interfaces.
All interfaces integrated in the LHCb framework.
Relational backend completely transparent.
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Maria del Carmen Barandela Pazos
Information needed by the online hw & sw components, like electronics boards, high voltage and low voltage power supplies and trigger algorithms, to be configured.
Information needed by the online hw & sw components, like electronics boards, high voltage and low voltage power supplies and trigger algorithms, to be configured.
Information needed by the online hw & sw components, like electronics boards, high voltage and low voltage power supplies and trigger algorithms, to be configured.
Information needed by the online hw & sw components, like electronics boards, high voltage and low voltage power supplies and trigger algorithms, to be configured.