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

B. Angstadt·G. Brooijmans·D. Chapin·D. Charak·M. Clements·S. Fuess·A. Haas·R. Hauser·D. Leichtman·S. Mattingly·A. Kulyavtsev·M. Mulders·P. Padley·D. Petravick·R. Rechenmacher·G. Watts·D. Zhang
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Abstract

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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B. Angstadt, G. Brooijmans, D. Chapin, D. Charak, M. Clements, S. Fuess, A. Haas, R. Hauser, D. Leichtman, S. Mattingly, A. Kulyavtsev, M. Mulders, P. Padley, D. Petravick, R. Rechenmacher, G. Watts, D. Zhang. 2003-06-29. The DZERO DAQ/Online Monitoring System and Applications, Including an Active Auto-recovery Tool. https://arxiv.org/abs/physics/0306195

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