The DZERO DAQ/Online Monitoring System and Applications, Including an Active Auto-recovery Tool

Details The DZERO DAQ/Online Monitoring System and Applications, Including an Active Auto-recovery Tool The DZERO DAQ/Online Monitoring System and Applications, Including an Active Auto-recovery Tool

2003-06-29

arxiv.org/abs/physics/0306195v1

ECONF C0303241:TUGP011,2003; ECONF C0303241:THGT004,2003

Physics

Instrumentation and Detectors

Talk from the 2003 Computing in High Energy and Nuclear Physics (CHEP03), La Jolla, Ca, USA, March 2003, 8 pages, PDF. PSN THG

Scientific paper

The DZERO experiment, located at the Fermi National Accelerator Laboratory, has recently started the Run 2 physics program. The detector upgrade included a new Data Acquisition/Level 3 Trigger system. Part of the design for the DAQ/Trigger system was a new monitoring infrastructure. The monitoring was designed to satisfy real-time requirements with 1-second resolution as well as non-real-time data. It was also designed to handle a large number of displays without putting undue load on the sources of monitoring information. The resulting protocol is based on XML, is easily extensible, and has spawned a large number of displays, clients, and other applications. It is also one of the few sources of detector performance available outside the Online System's security wall. A tool, based on this system, which provides for auto-recovery of DAQ errors, has been designed. This talk will include a description of the DZERO DAQ/Online monitor server, based on the ACE framework, the protocol, the auto-recovery tool, and several of the unique displays which include an ORACLE-based archiver and numerous GUIs.

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