🍭 Frontline tech director and chief architect at top-tier companies 🥝 Years of deep experience in internet, e‑commerce, social, and finance sectors 🌾 Committed to publishing high‑quality articles covering core technologies of leading internet firms, application architecture, and AI breakthroughs.
This article explains MySQL transaction fundamentals, illustrates a banking transfer scenario, details the ACID properties, explores dirty reads, non‑repeatable reads and phantom reads, and compares the four SQL‑92 isolation levels with practical code examples and InnoDB behavior.
An in‑depth comparison of B+Tree and B‑Tree reveals how their differing node designs affect storage capacity, tree height, disk I/O, range queries, caching, and insert/delete costs, with concrete MySQL InnoDB examples illustrating why B+Tree is the preferred index structure.
This article explains how to build a high‑throughput like and read counter that can handle 100,000 requests per second by layering Redis caching, optional AOF or MySQL persistence, cleaning invalid client requests, and separating business, statistics, and reporting logic.
This article explains the unique challenges of flash‑sale systems—massive, short‑lived traffic spikes—and presents practical backend optimizations such as front‑end request filtering, Redis‑based atomic counters, streaming queues, safe database updates, and unit‑level isolation for global deployments.
This article explains the five essential software architecture principles—Single Responsibility, Open‑Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion—detailing their definitions, real‑world e‑commerce examples, and why they are crucial for building maintainable, scalable systems.
The Zhiyu model, a 32‑billion‑parameter SRE‑focused LLM, combines extensive domain knowledge, enhanced professional skills, and deterministic RAG to deliver precise, actionable insights for intelligent operations, backed by a robust multi‑source training pipeline, staged training, and flexible deployment options.
This article explains how Redis handles key expiration, the TTL and TTI concepts, periodic and lazy deletion strategies, their impact on persistence and replication, and the various memory eviction policies—including LRU and LFU—so developers can efficiently manage data and improve system performance.
Integrating structured knowledge graphs with generative AI provides traceable, explainable, and high‑precision reasoning across domains such as medicine, finance, and law, through techniques like Retrieval‑Augmented Generation, graph neural networks, and adaptive planning, dramatically reducing hallucinations and boosting expert‑level performance.
Redis 8.0, released on May 1, 2025, introduces a major license shift to AGPLv3, eight new native data structures—including vector sets, JSON, and time‑series—alongside a rebuilt query engine that delivers up to 16‑fold performance gains, enhanced security, and cloud‑native capabilities.
This article walks through seven essential RocketMQ concepts—including message ordering, delayed delivery, accumulation handling, transactional guarantees, retry mechanisms, storage strategies, and filtering—providing code examples, configuration tips, and visual diagrams to help developers build robust distributed messaging systems.
