Contents

• Contents
• Introduction
  • High Performance Distributed Systems
  • Data Acquisition Systems
  • Object Oriented Software in Distributed DAQ Systems
  • Problem Statement
  • Achievement of the Presented Work
  • Thesis Organisation
• High Energy Physics
  • Creation of Matter - a Matter of Energy
    • The LHC collider
    • The CMS detector
  • Raw Data - Brute Force
  • Event Filtering - The Good, the Bad and the Ugly
    • Event Processing
    • Multilevel Event Building
    • Distributed Event Building
• DAQ Requirements and State of the Art Systems
  • Requirements
    • Speed
    • Scale
    • Dependability
    • System Management
  • State of the Art Systems
    • DAQ Systems
    • Computing Clusters
• Using Off-The-Shelf Components - An Assessment of CORBA
  • The Model
  • High Performance CORBA
  • CORBA in DAQ Systems
    • Real-Time versus Highly Efficient Systems
    • Application Areas
    • Speed Measurements
    • Tests with the TCP Transport Layer
    • CORBA with Pipes
    • CORBA with Shared Memory
    • Server Scaling Behaviour
  • Assessment
• A Custom Implementation of Remote Object Invocation
  • The Receiver Architecture
  • Client Architecture
  • An IPC Channel Interface
  • Performance Evaluation
    • FIFOs
    • Sockets
  • A Component Performance Model
  • Concurrent Server Architectures
  • Optimised Interprocess Communication
    • Zero Copy Components
    • User Level IPC
  • Conclusions
• Conducting Clusters of Workstations
  • Use Cases for DAQ Control Systems
    • Actors
    • Use Case Descriptions
  • Traditional Approaches
    • Batch Processing Systems
    • Program Steering Systems
    • Agent Facilities
    • Assessment
  • A Prototype Task Control System
    • Overall Architecture
    • The Framework Functionality
    • The Programmer Interface
  • System Management Policy Implementation
    • Centralised versus Distributed
    • Distributed Management
    • Task Synchronisation
  • An Example User Interface
  • Conclusion
• Conclusions and Outlook
  • Summary
  • Off-The-Shelf Distributed Component Middleware
  • System Management Tools
  • Future Research
• Additional References
  • IIOP Lite
  • The XMI Package
  • Option Red Upgrade
  • MAF.idl
• Bibliography

TableList of Tables FigureList of Figures