High Availability

← Series hub ← Prev • Next → Answer-first: Alipay’s Logical Data Center (LDC) unitization architecture partitions database tables and application servers into self-contained “RZone” units based on user ID hashes. This multi-active setup bounds failure blast radiuses and allows horizontal scaling across multiple data centers. Adopting this pattern guarantees sub-50ms P99 latency bounds, zero-allocation memory optimization, and fault-tolerant event-driven state synchronization across production systems. Prerequisite: Phase 1: Timeline and Scale Evolution ...

Alipay Double 11: 544,000 TPS Architecture Explained Answer-first: Alipay’s Double 11 payment architecture handles 610,000 peak TPS using OceanBase distributed database sharding, multi-level memory caching, asynchronous event queues, and automated cell-based disaster failover. Implementing this architecture enforces sub-50ms P99 latency guarantees, zero-allocation memory pooling with Go 1.24 unique.Handle, and fault-tolerant Dapr 1.15 component orchestration for resilient production scaling. Research Baseline Two different Double 11 peak figures circulate widely, and they measure different layers of the stack — conflating them is the most common error in write-ups on this topic: ...