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Oct 7, 2026 · Backend Development

Cache Rebuild Evolution at 10M QPS: From Cold Start to Hot Standby

This article details the evolution of cache reconstruction strategies for ten-million-QPS systems, covering cold-start dangers, persistence recovery limits, tiered hot-data backfill, dual-cluster hot standby for second-level failover, shard-level background rebuild with singleflight, and multi-layer database protection during rebuilds, advocating making pre-warming a routine capability.