Sharing insights on technical analysis and exchange, making life better through technology.
This article explains why a single Redis shard cannot handle extreme traffic, introduces multi‑level caching, and compares four practical methods—MQ synchronization, Redis Pub/Sub, version‑check, and automatic refresh—to keep local caches consistent under heavy load.
This article compares @Resource and @Autowired in the Spring framework, covering their origins, injection order, supported injection styles, and ideal usage scenarios to help developers choose the right annotation for loosely coupled, maintainable applications.
Mid‑platform (中台) architecture, inspired by Supercell’s rapid‑development model and popularized by Alibaba in 2015, evolved from a flexible business‑centric approach to a complex, sometimes cumbersome structure, offering reusable services but also introducing blurred responsibilities and scalability challenges for fast‑changing enterprises.
Serial execution runs tasks one after another, concurrency interleaves multiple tasks to appear simultaneous, and parallelism truly runs tasks at the same time on multiple cores, each offering distinct advantages and trade‑offs that affect efficiency, responsiveness, and programming complexity.
The article explains common scenarios that trigger frequent Full GC in Java, such as large object allocation, service timeouts, memory leaks, and old‑generation fragmentation, and offers insights on diagnosing and mitigating these issues to maintain application performance.
During peak travel periods, 12306 often displays available seats that cannot be booked, a problem caused by intricate inventory deduction across multiple travel segments, heavy caching strategies, and real‑time load pressures that lead to stale data and purchase failures.
With massive data growth, sharding databases introduces pagination challenges; this article explains the root cause of pagination issues in sharded environments, presents the global query method, its pros and cons, and introduces the no‑skip optimization to improve performance while maintaining data accuracy.
This article explains how to use Spring State Machine to model and control order lifecycle transitions in an e‑commerce system, covering core concepts, configuration, listeners, service integration, controller endpoints, and visual results for robust backend state management.
Learn how MySQL window functions—row_number, rank, and dense_rank—can efficiently rank and rank‑tie data such as class scores or sales amounts, with clear syntax examples, differences in handling duplicate values, and practical SQL queries illustrated with real‑world scenarios.
This article explains the workflow of mobile SMS verification login, outlines its main security risks such as code leakage, SMS bombing, and replay attacks, and provides practical mitigation strategies for developers and platform operators to protect user accounts.
