Blog / reliability

Posts tagged reliability

2 posts filed under this topic.

• HTTP Caching Is a Correctness Problem — Cache keys, freshness, validation, and invalidation are not performance trivia. A deep guide to Cache-Control, ETags, Vary, CDN behavior, stampedes, and the bugs that only appear when a cache is warm. 2026-11-04 · 17 min read
• Rate Limiting Is a Distributed Systems Problem — Token buckets, sliding windows, and GCRA are easy to implement on one machine and hard to make correct across many. A deep guide to algorithms, Redis races, key design, 429 semantics, and failing gracefully under load. 2026-11-01 · 21 min read