CERN Accelerating science

ATLAS Note
Report number	ATL-DAQ-CONF-2007-029 ; ATL-COM-DAQ-2007-031
Title	The Message Reporting System of the ATLAS DAQ System
Author(s)	Caprini, M (Bucharest, IFIN-HH) ; Fedorko, I (CERN) ; Kolos, S (UC, Irvine (main))
Publication	2008
Imprint	09 Oct 2007
Number of pages	5
In:	10th ICATPP Conference on Astroparticle, Particle, Space Physics, Detectors and Medical Physics Applications, Villa Olmo, Como, Italy, 8 - 12 Oct 2007, pp.776-780
DOI	10.1142/9789812819093_0128
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	ATLAS ; DAQ ; online software ; MRS ; message reporting system
Abstract	The Message Reporting System (MRS) in the ATLAS data acquisition system (DAQ) is one package of the Online Software which acts as a glue of various elements of DAQ, High Level Trigger (HLT) and Detector Control System (DCS). The aim of the MRS is to provide a facility which allows all software components in ATLAS to report messages to other components of the distributed DAQ system. The processes requiring a MRS are on one hand applications that report error conditions or information and on the other hand message processors that receive reported messages. A message reporting application can inject one or more messages into the MRS at any time. An application wishing to receive messages can subscribe to a message group according to defined criteria. The application receives messages that fulfill the subscription criteria when they are reported to MRS. The receiver message processing can consist of anything from simply logging the messages in a file/terminal to performing message analysis. The inter-process communication is achieved using the CORBA technology. The design, architecture and the used technology of MRS are reviewed in this paper.
Copyright/License	Preprint: (License: CC-BY-4.0)

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