Tag
rollouts
- Jul 17, 2026 How Many Requests a Canary Gate Needs Before Its Verdict Means Anything The sample-size arithmetic behind canary health checks, why rare failures and tail latencies need orders of magnitude more traffic, and how sequential testing changes the threshold. distributed systems
- Jun 24, 2026 Mixed-Version Operation: What Two Versions Must Agree On Why every rolling upgrade temporarily runs two builds at once, which interfaces must be bidirectional across that window, and how expand-migrate-contract keeps them so. distributed systems
- Jun 19, 2025 Rolling Back a Change That Already Mutated State Why reverting a binary does not revert its writes, which mutations admit a compensating action, and how to decide before deployment whether a rollback path exists at all. distributed systems
- Jul 21, 2024 Rollout Waves and the Arithmetic of Blast Radius How staged deployment divides one risky decision into a sequence of gated ones, why wave size sets the smallest detectable failure rate, and where correlated faults break the model. distributed systems