Data Acquisition Shift
Contents
The Data Acquisition System (DAQ)
GlueX DAQ system is based on CODA software toolkit.
DAQ consists of ~50 embedded hardware readout controllers known as ROCs running LINIX OS, communicating with many other (data transfer, control and monitoring) processes. Data is transported between processors using standard network protocols (TCP/IP).
Routine Operation
Starting and stopping the DAQ System
Steps to start DAQ processes in case of all HW is powered up:
1. Login as hdops user on any gluonXX computer and execute:
HDOPS gluon47:~> cd CDAQ/ HDOPS gluon47:~/CDAQ> source online_setup.cshrc HDOPS gluon47:~/CDAQ> rcm.sh
This will bring up the screen for DAQ configuration:
Run Control operation
DAQ for standalone run of subdetector can be started in interactive mode, when all processes open x-terminal window. Running whole system in this mode is impractical, due to a large number of windows (50+), and in this case most of processes should be strted in backgroung, keeping only run control window.
