The article dissects a proven trillion‑level counter architecture, tracing its evolution from a simple MySQL table through hash sharding, a full Redis migration, deep Redis memory optimizations, and hot‑cold separation, while detailing the trade‑offs and performance gains at each step.
This article explains the design and implementation of ROR (Redis‑On‑Rocks), a Redis extension that adds hot‑cold data swapping using RocksDB to dramatically reduce memory costs, improve performance, and remain compatible with Redis commands, while detailing benchmarks, concurrency control, and future roadmap.
In 2022 Tencent's A/B Test team created the overseas SaaS product ABetterChoice, abstracting internal experiment capabilities, adapting to multi‑cloud compliance, and unifying computation with StarRocks, enabling game titles like Honor of Kings, PUBG Mobile, and Ubisoft to run scalable, compliant A/B experiments worldwide.
This article describes how a ClickHouse cluster was re‑architected to use SSD for hot data and SATA HDD for cold data, details the configuration of custom storage policies, explains a restart‑time path‑collision error, and provides the fix to restore normal operation.
