Supervision of the ATLAS High Level Trigger System

Details Supervision of the ATLAS High Level Trigger System Supervision of the ATLAS High Level Trigger System

2003-05-28

arxiv.org/abs/hep-ex/0305093v1

Physics

High Energy Physics

High Energy Physics - Experiment

Talk from the 2003 Computing in High Energy and Nuclear Physics (CHEP03), La Jolla, Ca, USA, March 2003, 6 pages, PDF (from MS

Scientific paper

The ATLAS High Level Trigger (HLT) system provides software-based event selection after the initial LVL1 hardware trigger. It is composed of two stages, the LVL2 trigger and the Event Filter. The HLT is implemented as software tasks running on large processor farms. An essential part of the HLT is the supervision system, which is responsible for configuring, coordinating, controlling and monitoring the many hundreds of processes running in the HLT. A prototype implementation of the supervision system, using tools from the ATLAS Online Software system is presented. Results from scalability tests are also presented where the supervision system was shown to be capable of controlling over 1000 HLT processes running on 230 nodes.

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