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Yeti Operations

Yeti Operations. Introduction and Day 1 Settings. Rob Lane HPC Support Research Computing Services CUIT hpc-support@columbia.edu. Topics Yeti Operations Committee Introduction to Yeti Rules of Operation. Yeti Operations Committee Determines cluster policy

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Yeti Operations

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  1. Yeti Operations Introduction and Day 1 Settings

  2. Rob Lane HPC Support Research Computing Services CUIT hpc-support@columbia.edu

  3. Topics Yeti Operations Committee Introduction to Yeti Rules of Operation

  4. Yeti Operations Committee • Determines cluster policy • In the process of being set up • In the meantime we need a policy for day 1 of operations

  5. 2. Introduction to Yeti

  6. Final Node Count

  7. Meet Your New Neighbors

  8. Group Shares

  9. Other Groups • Renters • Free Tier • CUIT

  10. Rules of Operation Job Priority Job Characteristics Queues Guaranteed Access

  11. Job Priority • Every job waiting to run is assigned a priority by the scheduling software • The priority determines the order of jobs waiting in the queue

  12. Job Priority Components • Group’s share vs. recent usage • User’s recent usage • Other factors

  13. Recent Usage • What does “recent” mean? • It’s configurable • Yeti’s setting: 7 Days

  14. Job Characteristics • Nodes and cores • Time • Memory

  15. Job Queues (subject to change)

  16. Guaranteed Access • New mechanism • Subject to review by Yeti Operations Committee • We’re going to try it out in the meantime

  17. Guaranteed Access • Groups have each been assigned systems • Group jobs get priority access to their own systems • “Guaranteed Access” means there will be a known maximum wait time before your job starts running

  18. Guaranteed Access Example • The group astro owns the node Brussels • Only two types of jobs will be allowed on Brussels • Astro jobs • Short jobs

  19. Job Queues (subject to change)

  20. Guaranteed Access Debate • Good because researchers have guaranteed access rights to nodes • Bad because long jobs lose access to many nodes

  21. Thanks! Comments and Questions? hpc-support@columbia.edu

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