write-after-read

Tencent Cloud Developer

Nov 27, 2024 · Databases

Analyzing the Write‑After‑Read Consistency Challenge in Multi‑Active Distributed Architectures

The article examines the write‑after‑read consistency problem in multi‑active cross‑region systems, compares single‑write‑single‑read routing, quorum‑based multi‑write‑multi‑read, and read‑while‑copy methods, explains why primary‑secondary replication is preferred, and proposes a four‑step framework—scenario flagging, data marking, latency evaluation, and near‑by asynchronous replication—to meet WAR requirements efficiently.