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Last update: Apr 1, 2000

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Towards an Open Source Project for Online Software

Robert Jones

Speaker: Robert Jones

  The goal of the ATLAS data acquisition (DAQ) and Event Filter (EF) prototype "-1" project is to produce a prototype system representing a "full slice" of a DAQ suitable for evaluating candidate technologies and architectures for the final ATLAS DAQ system on the LHC accelerator at CERN. Within the prototype project, the Back-end sub-system encompasses the software for configuring, controlling and monitoring the DAQ but specifically excludes the processing or transportation of physics data. The Back-end software is essentially the "glue" that holds the online systems together. It does not contain any elements that are detector specific as it will be used by many configurations of the DAQ and detector instrumentation. Interfaces are required to the triggers, processor farm, accelerator, event builder, detector read-out create controllers and Detector Control System (DCS). This presentation describes how the Back-end software has been developed by a collaboration of 9 institutes in a distributed manner using software engineering principles, OO techniques and following a well defined software process. The lessons learnt from this experience are shown. This presentation then goes on to propose converting the existing Back-end software into an open source project. It gives the motivation and justification for moving to an open source project then identifies some issues involved and suggests a structure for the organization of the project and a plan for how to proceed. For more information see http://atddoc.cern.ch/Atlas/DaqSoft/Welcome.html

Presentation:  PowerPoint Long Paper:  Adobe Acrobat pdf 

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