~/talk

PIMS: Fleet-Wide Datacenter Maintenance with Minimal Capacity Buffer and Predictable Lat…

on YouTube 17m
Talkat 20th USENIX Symposium on Operating Systems Design and Implementation (OSDI '26) · 2026-07-13..07-15· [infrastructure-as-code, devops-and-delivery]

speakers

name:Benjamin Leonhardi
linkedin:benjamin-leonhardi-83b6348
name:Evangelia Kalyvianaki
links:none on file
name:Yang Wang
links:none on file
name:Abdelrahman Adam
links:none on file
name:Agshin Nabiyev
links:none on file
name:Aleks Shirokov
links:none on file
name:Amitav Mohanty
links:none on file
name:Daniil Balenko
links:none on file
name:Elaine Zhao
links:none on file
name:Essam Ewaisha
links:none on file
name:Hongbo Dong
links:none on file
name:Igor Marnat
links:none on file
name:Lev Novikov
links:none on file
name:Min Zeng
links:none on file
name:Steven Shingler
links:none on file
name:Timofey Durakov
links:none on file
name:Wiliam de Abreu Pinho
links:none on file
name:Ben Christensen
x:benjchristensen
name:Mayank Pundir
links:none on file
name:Kaushik Veeraraghavan
links:none on file

resources

video:https://youtu.be/r34_SoPHdfg
slides:none on file

summary

PIMS is a production system running five years across millions of servers and tens of thousands of services that enforces a one-domain regional contract (at most one maintenance domain down at once), aligns service and maintenance domains, and sequences domains in a maintenance train that visits every domain at least once in 45 days. It uses hardware rebalancing and a dual-buffer design, achieves a drain SLA for buffer handoff (30 minutes target; four such fleet events in 2025 resolved <20 minutes), reports a breach rate ~1 per million, and shrinks capacity buffer ~15% in Q1 2025 while meeting rollout SLOs (45 days OS, 90 days firmware).

AI-written summary · about

chapters (11)

  1. 0:00PIMS and fleet maintenance
  2. 1:45Seamless predictable maintenance
  3. 2:51Aligned domains in IAS contract
  4. 4:17Single-domain-down contract necessity
  5. 6:51Extending contract to service domains
  6. 8:59Hardware spread and rebalancing
  7. 9:20Buffer strategies for maintenance
  8. 12:09Consistent service expectations
  9. 13:56Maintenance sequencing guarantees
  10. 15:43Disaster recovery expectations
  11. 16:23Conclusion and benefits

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