Lobster Programming
Nov 9, 2024 · Databases
How to Split Hot Keys in Redis Cluster to Avoid Single-Shard Bottlenecks
Redis can become a bottleneck when a hot key concentrates traffic on a single shard; this article explains how to split such hot keys into multiple sub‑keys, distribute them across cluster nodes using CRC16 slot mapping, and implement the approach in high‑concurrency scenarios like coupon grabs or real‑time leaderboards.
ClusterDatabase ScalingKey Sharding
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