10 years of front‑line experience at leading firms (Xiaomi, Baidu, Meituan) in development, architecture, and management; discusses technology and life.
The article dissects why many avoid proactive upward reporting, outlines three core reasons—fear of unequal evaluation, formalism, and lack of confidence—then offers concrete reporting types, step‑by‑step structures, sincerity and differentiation tactics, and warns of misuse and cross‑level pitfalls.
This article walks through Xxl-Job’s core concepts, demo setup, executor initialization, job‑handler registration, scheduling thread logic, fast/slow thread‑pool optimization, routing strategies, blocking policies, and result callbacks, revealing how the lightweight distributed scheduler operates end‑to‑end.
This article walks through the full design of a billion‑user group chat system, covering functional and non‑functional requirements, core components such as WebSocket and Redis, face‑to‑face group creation, message flow, database schema, and performance‑oriented scaling techniques.
The article explains how Redis Cluster distributes keys using CRC16‑based hash slots instead of traditional consistent hashing, detailing the slot calculation, node addition and removal processes, client redirection, smart client optimizations, and the design reasons behind the fixed 16,384 slot count.
This article compares five popular service registries—Zookeeper, Eureka, Nacos, Consul, and Etcd—by explaining their core concepts, CAP trade‑offs, consensus algorithms, feature sets, and practical deployment considerations to help engineers select the most suitable solution for their microservice architecture.
This article explains the principles and benefits of distributed tracing, introduces the OpenTracing standard, details SkyWalking's architecture and solutions for automatic span collection, context propagation, unique trace IDs, sampling strategies, performance impact, and shares practical customizations and plugin development experiences.
This article analyzes the theoretical and practical limits of a single MySQL InnoDB table by examining B+‑tree depth, page layout, row format, and index pointer size, then calculates minimum and maximum record counts for int and bigint primary keys and validates the results with real‑world table schemas.
Facing 20 billion daily requests, Ctrip’s API gateway evolved from a Zuul‑based prototype to a fully asynchronous, single‑threaded Netty design, employing RxJava, custom flow control, multi‑protocol support, and modular governance to achieve high throughput, low latency, and scalable operations.
This article explains CDN fundamentals, its DNS‑based routing and caching mechanisms, how back‑origin works, when CDN accelerates content delivery, the costs involved, and scenarios where using a CDN may not bring performance benefits.
This article walks through the full design of a large‑scale comment system, covering functional requirements, database schema, distributed architecture, high‑concurrency handling, caching, security measures like Bloom filters, and optional NLP‑based sentiment analysis to moderate live‑stream comments.
