Glossary term
What is Lua (Lua script (Redis))?
Lua stands for Lua script (Redis).
A small script that Redis runs in one step, so nothing can interrupt it. A read-then-write like a token bucket update cannot race.
Learn it properly · Practical Design ProblemsLesson 2: Design a Rate LimiterToken bucket, leaky bucket, fixed and sliding windows, where to apply limits, 429 with Retry-After, and the new RateLimit headers.