System Changes History

Contents:

• ARC System Changes: 2025-05
  • Partition Changes
    • Consolidation
    • User-selectable features for heterogeneous partitions
    • Decoupling CPU and Memory Requests to enable “right-sizing” of jobs
  • Job Billing
    • Free Tier Increases to 1M units per PI monthly
    • Billing Begins for Owl and Falcon clusters
    • Billing Reflects All Resources Allocated
  • Adding QOS Options for Scheduling Flexibility
  • Cluster organization
    • Infer cluster being retired
    • Operating System Upgrade on All Clusters
    • Cluster data to be made “private”
  • ARC Provided Software and Modules Unification and Overhaul
    • Mount point updates for software stacks
  • Answers for some frequently asked questions (FAQ)
    • Job Script Syntax and Parameters
    • Software
    • Billing
• ARC System Changes: 2023-05
  • New SCRATCH filesystem
    • 90-day age limit enforced
    • No quota enforcement
  • /fastscratch is deprecated
  • Open On Demand
  • Singularity modules updated to recent Apptainer release
  • Nvidia drivers and CUDA upgrades
  • EasyBuild upgraded
  • Storage expansion for /projects
  • Slurm upgraded on Tinkercliffs
  • OS and Other updates
  • Get Help
• ARC System Changes: 2025-01
  • Outline of Changes
    • Tinkercliffs Operating System Upgrade from CentOS 7 to Rocky 9
    • New Open OnDemand
    • /scratch and /common replacing /globalscratch and /global
    • /fastscratch and /vtarchive removed from clusters
  • Answers for some frequently asked questions (FAQ)
    • “The software module I used before maintenance isn’t there now. Can you reinstall it for me?”
    • “What does ‘Legacy Apps’ on Open OnDemand mean?”
    • “How can I recover data from /fastscratch?”
• ARC System Changes: 2023-01
  • Notes and Guidance for January 2023 cluster changes
    • Changes to /home on Cascades and Dragonstooth
    • New policies for /fastscratch
  • All ARC systems down for maintenance
    • Rationale
    • A new CPU system in the works
  • What is NOT directly affected?
  • Actions you may need to take
    • Cleanup data in /groups and /work
  • Get Help
• ARC Storage Changes: 2022-03
  • Outline of Impacts
    • Impact on /projects on Tinkercliffs and Infer
    • Impact on /work on Tinkercliffs and Infer
    • ARC Begins a “Use Scratch for Jobs” campaign
    • Cascades, Dragonstooth, Huckleberry unaffected at this time
  • Actions you may need to take
    • Get within quota on /projects
    • Retrieve data that was previously in /work
    • Change jobscripts so that /work path and $WORK environment variable are not used
  • Get Help