~/talk

Learnings from Deploying Network QoS Alignment to Application Priorities for Storage...

on YouTube 16m
Talkat NSDI '25 · 2025-04-28..04-30· [networking]

speakers

name:Matthew Buckley
links:none on file
name:Parsa Pazhooheshy
links:none on file
name:Z. Morley Mao
links:none on file
name:Nandita Dukkipati
links:none on file
name:Hamid Hajabdolali Bazzaz
links:none on file
name:Priyaranjan Jha
links:none on file
name:Yingjie Bi
links:none on file
name:Steve Middlekauff
links:none on file
name:Yashar Ganjali
links:none on file

resources

video:https://youtu.be/vt8ZOe51nec
slides:none on file

summary

Deploys an RPC-level mapping from application priorities to DSCP/WFQ classes (Aquidus) across storage traffic, performed via per-customer, per-region canaries sampling a fraction of traffic. Builds control vs. treated comparisons and telemetry for RPC latency, retries, timeouts and queue load. Finds per-RPC DSCP alignment fixes priority inversion, achieves 80% of request/response bytes aligned for four large Spanner clients, and shows downgrades can improve latency under overloaded queues.

AI-written summary · about

chapters (8)

  1. 0:00Network QoS for storage
  2. 1:42Network congestion effects
  3. 3:49RPC priorities and QoS costs
  4. 7:01QoS deployment challenges
  5. 10:12Spanner priority misalignment
  6. 11:59Production results after QoS
  7. 13:02Key learnings
  8. 15:09Conclusion and future

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