The BaBar data reconstruction control system

The BaBar data reconstruction control system

The BaBar experiment is characterized by extremely high luminosity and very large volume of data produced and stored, with increasing computing requirements each year. To fulfill these requirements a control system has been designed and developed for the offline distributed data reconstruction syste...

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Bibliographic Details
Published in:IEEE transactions on nuclear science Vol. 52; no. 4; pp. 919 - 926
Main Authors: Ceseracciu, A., Piemontese, M., Tehrani, F.S., Pulliam, T.M., Galeazzi, F.
Format: Journal Article
Language:English
Published: New York IEEE 01-08-2005
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Automatic control
Calibration
Computation
Control system
Control systems
Data acquisition
Design engineering
Detectors
distributed systems
Farms
Flexibility
high energy physics software
Linear accelerators
Mathematical models
Message passing
Multitasking
Physics
Production
Reconstruction
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Summary:The BaBar experiment is characterized by extremely high luminosity and very large volume of data produced and stored, with increasing computing requirements each year. To fulfill these requirements a control system has been designed and developed for the offline distributed data reconstruction system. The control system described in this paper provides the performance and flexibility needed to manage a large number of small computing farms, and takes full benefit of object oriented (OO) design. The infrastructure is well isolated from the processing layer, it is generic and flexible, based on a light framework providing message passing and cooperative multitasking. The system is distributed in a hierarchical way: the top-level system is organized in farms, farms in services, and services in subservices or code modules. It provides a powerful finite state machine framework to describe custom processing models in a simple regular language. This paper describes the design and evolution of this control system, currently in use at SLAC and Padova on /spl sim/450 CPUs organized in nine farms.
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ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2005.852701