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Jefferson Lab Report

Jefferson Lab Report. Karen S. White 11/14/00. Overview. Status of Jefferson Lab Control System Work In Progress Transitioning to Operations. Our EPICS System. Over 70 HP-UX Workstations Over 150 IOCs – Motorola 167/177, PowerPC 2700 ~226 Device Control Applications

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Jefferson Lab Report

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  1. Jefferson Lab Report Karen S. White 11/14/00

  2. Overview • Status of Jefferson Lab Control System • Work In Progress • Transitioning to Operations

  3. Our EPICS System • Over 70 HP-UX Workstations • Over 150 IOCs – Motorola 167/177, PowerPC 2700 • ~226 Device Control Applications • ~1200 Instantiations Across IOCs • ~300 User Interface, System and High Level Applications • Very Reliable, Working Well

  4. Outstanding Problems • CPU load too high on many IOCs • Replace 15-30 167/177s with PowerPCs over the next year • Reduce load from UDP broadcast traffic • Channel Access Security Semaphore Bug • When switching between security modes, occasionally, a semaphore is not released causing varying numbers of IOCs to appear “down” to the operators

  5. Working On • New Archive Engine with LANL – Matt Bickley Talk for Chris Larrieu • Striptool – Matt Bickley Talk for Chris Larrieu

  6. Working On • Central Database • For Operational Data • For Development Data Like Configuration Info • Evaluating Requirements • Learning from Other Labs First • Held a Workshop with other EPICS sites 9/00 (Bickley Talk)

  7. Working On • Managing Network and IOC Load • Use Channel Access Gateway for all clients outside of Control Room • Channel Access Nameserver • Improvement – Joan Sage Talk • Use with more clients; currently only medm and burt • Upgrading CPU starved IOCs to Power PC -Richard Dickson Talk

  8. HELIOS • New project at JLab • Compact Synchrotron Light Source being moved from New York • Current control system runs on VAX/VMS • Plan to convert to EPICS

  9. Operational Considerations • Development and Maintenance Resources • People, Hardware, Software • Maintenance Schedule – How Often, When? • Can you load new software • Can you reboot IOCs/Workstations/Network • Procedures for insuring smooth return to Ops • Capacity Planning • Replace a fraction of selected hardware annually • Add additional capacity for data storage, network bandwidth, CPUs annually

  10. Standards • Ability to maintain the Control System depends on Standards • Documentation • Code Development • Code Structure • Code Control • Installation • Testing • Naming Conventions

  11. Upgrades • Upgrading Software • OS Version – IOC & Workstation • Patches • EPICS Version • Adding New Features • Adding New Systems • Upgrading Hardware • Additional Capacity • Maintainability • Must be able to upgrade machines independently

  12. Control System Segmentation • JLab Control System Segmented Into Fiefdoms • Segmentation Transparent To User • Fiefdoms Can Function Independently • Prevents machine downtime for failure in a non-critical area • Minimizes machine downtime for failure in a critical area • Network Control • Traffic Isolation • Redundant Routing • Dedication of Resources • Allows machines to be upgraded independently

  13. Fiefdoms Structure • Server with • Executable Code • IOC Load Files • Data Files • User Accounts • Network Segment with Controlled Access • Workstations • Operator Consoles • Code Execution Engines • IOCs

  14. Inside A Fiefdom WKST WKST WKST WKST To External Network Internal Network Server IOC IOC IOC IOC IOC

  15. Control System Segmentation FEL DEV AES OPS GTST ACC EXT SVC HALL CRYO HABC TLAB CHL Router Fiefdom

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