DISCS - Distributed Information Services for Control Systems

Eric Berryman

FRIB-NSCL,East Lansing, Michigan, USA.

Overview

2

Problem Vision Collaborators Architecture Development Methodology

Domains & Modules Current Status Conclusion

The Problem

Problem Statement

4

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

5

DISCS

DISCS Vision

7

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

8

DISCS – Scope II

9

DISCS Collaborators

10

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

China

DISCS Challenges

11

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

13

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

14

Development Methodology

15

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

16

Module: An Implementation Of A Domain

DISCS - Status

DISCS Status

18

Domain Team Status

Configuration FRIB,ESS,Cosylab

In Production At FRIB

Cables FRIB Under Development

eTraveler FRIB In Production At FRIB

Lattice-Model BNL, FRIB, ESS Prototypes At FRIB and BNL

Logbook BNL, FRIB In Production At FRIB & BNL.

Inventory FRIB Under Development

Naming System

FRIB In Production at FRIB

Operations FRIB Under Development

Save/Restore BNL In Production at BNL

Security ESS, Cosylab, FRIB

Under Development

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

Unit Conversion

BNL Under Development

DISCS - Screenshots

20

Logbook: Web Client

21

Logbook: CSS Client

22

Logbook: pyOlog

23

eTraveler – List of Travelers

24

eTraveler – DevicesIntegration with Configuration Module

25

Configuration: Component Tree

26

Configuration: Magnet Measurement

27

Configuration: Live Signals (PV)

28

Screenshots – Configuration Module

29

Configuration: Component Relationships

30

Configuration: Component Relationships

31

Configuration: Lattice

32

Lattice-Model: Beamlines

33

Naming Convention – Name Elements

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

34

Naming Convention – Submit Requests

Submit Requests to Add, Modify, or Delete Name Elements

35

Naming Convention – Process Requests

36

Naming Convention - Reports

37

Screenshots – Unit Conversion

38

Screenshots – Save/Restore

39

Cables – Normal View

40

Cables – Manager View

41

Cables - Types

Conclusion

42

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

43

“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!