DISCS - Distributed Information Services for Control Systems

Eric Berryman

FRIB-NSCL,East Lansing, Michigan, USA.

Overview

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Problem Vision Collaborators Architecture Development Methodology

Domains & Modules Current Status Conclusion

The Problem

Problem Statement

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Disparate and Heterogeneous Systems Used During The Design, Construction, Commissioning, Operation, and Maintenance of an Experimental Physics Facility (EPF)

No Way to Share Data

Problem Illustration

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DISCS

DISCS Vision

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To Develop Collaborating Services That Any Experimental Physics Facility Can Easily Configure, Use, And Extend For Its Design, Commissioning, Operation, And Maintenance

DISCS – Scope I

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DISCS – Scope II

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DISCS Collaborators

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Brookhaven National Lab, USA Cosylab, Slovenia European Spallation Source, Sweden Facility for Rare Isotope Beam, USA Institute for High Energy Physics,

China

DISCS Challenges

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Integration Of Myriad Databases Multiple Teams From Different Labs Geographically Dispersed Collaboration Labs Have Different Priorities Labs Have Different Schedules Labs Have Different Technology Platforms Differing Software-engineering Processes

DISCS – Architecture

DISCS Architecture

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Application layer• Operator interfaces• High-level applications• Libraries

Service layer• Access to data• Programming Interface

Data layer• Managed data• Instrument data• No direct access

EPICS V4 - DISCS

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Development Methodology

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I – Divide Entire System Is Broken Down Into Smaller Loosely-

coupled Parts Or Domains II – Develop

Each Domain Is Implemented Independently III – Frame

Application Programming Interfaces Are Developed IV – Integrate

Domains Are Integrated

Check Paper For Details

DISCS Modules

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Module: An Implementation Of A Domain

DISCS - Status

DISCS Status

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Domain Team StatusConfiguration FRIB,ESS,Cosy

lab In Production At FRIB

Cables FRIB Under DevelopmenteTraveler FRIB In Production At FRIB Lattice-Model BNL, FRIB, ESS Prototypes At FRIB and BNLLogbook BNL, FRIB In Production At FRIB & BNL.Inventory FRIB Under DevelopmentNaming System

FRIB In Production at FRIB

Operations FRIB Under DevelopmentSave/Restore BNL In Production at BNLSecurity ESS, Cosylab,

FRIBUnder Development

Signals (PV) BNL In Production at BNL, FRIB (ChannelFinder)

Unit Conversion

BNL Under Development

DISCS - Screenshots

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Logbook: Web Client

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Logbook: CSS Client

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Logbook: pyOlog

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eTraveler – List of Travelers

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eTraveler – DevicesIntegration with Configuration Module

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Configuration: Component Tree

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Configuration: Magnet Measurement

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Configuration: Live Signals (PV)

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Screenshots – Configuration Module

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Configuration: Component Relationships

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Configuration: Component Relationships

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Configuration: Lattice

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Lattice-Model: Beamlines

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Naming Convention – Name Elements

Name Elements Are Parts of A Name: System, Subsystem, Device Type etc

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Naming Convention – Submit Requests

Submit Requests to Add, Modify, or Delete Name Elements

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Naming Convention – Process Requests

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Naming Convention - Reports

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Screenshots – Unit Conversion

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Screenshots – Save/Restore

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Cables – Normal View

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Cables – Manager View

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Cables - Types

Conclusion

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Described An Information Services Framework For Accelerator Design, Commissioning, Operation, And Maintenance

Discussed Challenges To Collaborative Development

Acknowledgements: IRMIS, Control System Studio, EPICS V4, ChannelFinder,

and PVManager Teams

DISCS Website: http://discs.openepics.org

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“Nine people can’t make a baby in a month.” – Fred Brooks, The Mythical Man-Month

“Computer science is no more about computers than astronomy is about telescopes” – Edsger W Dijkstra

Thank you!