Hard Design: Rate Limiter
Why must the sliding window check-and-increment be done atomically in Redis?
— Tests your understanding of this concept.
Answer Options
A Redis requires atomic operations
B ZCARD then ZADD is a race condition — two concurrent requests can both see count < limit and both get allowed
C Atomicity improves performance
D Redis Sorted Sets require atomic access
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See the Answer on Guru Sishya →This question is from the Design: Rate Limiter topic (System Design Cases).
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