This article explains how to design and implement a WeChat group red packet feature, covering database schema, non‑cached and cached workflows, concurrency control with Redis locks, and two allocation algorithms—random distribution and double‑average method.
This article explains the ABA concurrency issue in distributed systems and presents three practical solutions—using Redis locks, implementing optimistic locking with version fields, and leveraging ordered message queues—to ensure data consistency under concurrent updates.
This article examines four architectural approaches for importing Excel data—synchronous, thread‑pooled with MQ, fully asynchronous with Redis locks, and an ideal high‑throughput variant—detailing their trade‑offs, performance impacts, and suitable business scenarios in modern backend systems.
This article explains the concepts, designs, and practical implementations of distributed locks using databases, Redis, and Zookeeper, compares their advantages and drawbacks, and provides code examples and best‑practice recommendations for reliable concurrency control in distributed systems.
This article explains the necessity of distributed locks in multi‑node applications, outlines the essential properties a distributed lock must satisfy, and compares three common implementation methods—database‑based exclusive locks, Redis‑based locks, and Zookeeper‑based locks—highlighting their advantages, drawbacks, and usage patterns.
Alibaba migrated Xianyu Coin’s points from the legacy KingTower platform to the new Banliang service using a four‑phase, service‑based approach—preparation, active/passive data migration with distributed locks, dual‑write for consistency, reconciliation, and a gradual service switch—completing the transition in a month without user impact.
This article examines the design and implementation of distributed locks using databases, Redis, and Zookeeper, outlining their core characteristics, practical code patterns, performance trade‑offs, fault‑tolerance mechanisms, and guidance on selecting the right solution for specific workloads.
