| Priority | Example | Acknowledge | Fix by |
|---|---|---|---|
| P1 — Critical | Whole cluster down | 15 min | 4 hr |
| P2 — High | Multiple nodes down, scheduler impacted | 30 min | 8 hr |
| P3 — Medium | Single node down | 2 hr | 24 hr |
| P4 — Low | Cosmetic/no active impact | Next business day | 5 business days |
Any P1/P2 incident gets a written post-incident review within 5 business days — what happened, why, and what we're changing to prevent a repeat.
The level of process scales with the risk:
Every change follows the same rollout pattern: test in a lab → soak in staging for 48 hours → get the change approved → roll out gradually (one node, then one rack, then the rest) → abort immediately if error rates rise or validation fails at any step.