Alibaba Cloud Developer

Mar 13, 2020 · Databases

How HotRing Boosts In-Memory KV Store Performance by 2.58×

The article introduces HotRing, a hotspot‑aware in‑memory key‑value store from Alibaba's Tair team, explains the extreme traffic challenges of Alibaba's Double‑11 peak, details the design of ordered‑ring hashing, dynamic hotspot detection, lock‑free concurrency and rehashing, and shows how these innovations achieve up to 2.58× higher throughput than existing KV systems.