The DZERO DAQ/Online Monitoring System and Applications, Including an Active Auto-recovery Tool
msra(2003)
摘要
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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关键词
satisfiability,real time,data acquisition
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