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21-25 May 2012
New York City, NY, USA
US/Eastern timezone

Online Metadata Collection and Monitoring Framework for the STAR Experiment at RHIC

24 May 2012, 13:30
4h 45m
Rosenthal Pavilion (10th floor) (Kimmel Center)

Rosenthal Pavilion (10th floor)

Kimmel Center

Poster Online Computing (track 1) Poster Session


Dmitry Arkhipkin (Brookhaven National Laboratory)


The STAR Experiment further exploits scalable message-oriented model principles to achieve a high level of control over online data streams. In this report we present an AMQP-powered Message Interface and Reliable Architecture framework (MIRA), which allows STAR to orchestrate the activities of Metadata Collection, Monitoring, Online QA and several Run-Time / Data Acquisition system components in a very efficient manner. The very nature of the reliable message bus suggests parallel usage of multiple independent storage mechanisms for our metadata. We describe our experience of a robust data-taking setup employing MySQL and HyperTable based archivers for metadata processing. In addition, MIRA has an AJAX-enabled web GUI, which allows real-time visualisation of online process flow and detector subsystem states, and doubles as a sophisticated alarm system when combined with complex event processing engines like Esper, Borealis or Cayuga. Reported data and suggested path forward are based on our experience during the 2011-2012 running of STAR.

Primary authors

Dmitry Arkhipkin (Brookhaven National Laboratory) Gene Van Buren (Brookhaven National Laboratory) Dr Jerome LAURET (BROOKHAVEN NATIONAL LABORATORY) Wayne Betts (Brookhaven National Laboratory)

Presentation Materials