Joined Tencent (nicknamed "Goose Factory") through campus recruitment at a second‑tier university. Career path: Tencent → foreign firm → ByteDance → Tencent. Started as an interviewer at the foreign firm and hopes to help others.
This article explains why HTTPS is essential for secure web communication, detailing how it upgrades plain HTTP by adding certificate‑based identity verification, TLS handshake negotiation, and AES‑GCM encryption with MAC verification to protect against eavesdropping, tampering, and phishing attacks.
This guide explains how CPU scheduling works, why 100% CPU usage occurs, and provides a step‑by‑step troubleshooting workflow—including monitoring with top/vmstat, identifying offending threads, analyzing stack traces, and applying both quick‑fix and long‑term remediation techniques—to keep systems stable.
This article explains the role of DNS as the hidden navigator that maps human‑readable domain names to IP addresses, details the four‑layer caching hierarchy, walks through recursive and iterative query flows, outlines common DNS failures, and offers practical troubleshooting and performance‑boosting tips.
This article walks through how a device obtains an IP address via DHCP, covering the broadcast discovery, server offer, client request, and acknowledgment phases, the differences between static and dynamic addressing, lease management, common conflicts, and practical troubleshooting steps.
This article dissects the core processes, functional challenges, and architectural design of a high‑throughput, strongly consistent e‑commerce order system, covering forward and reverse flows, order creation, payment, fulfillment, cancellation, after‑sale handling, and the layered backend architecture that powers it.
This article walks through the end‑to‑end design of a leaderboard that must serve over 100 million users with 100 k queries per second, covering requirement clarification, real‑time and accuracy challenges, technology selection such as Redis ZSet, multi‑layer architecture, sharding, caching, monitoring, and practical implementation tips to achieve low latency, high consistency, and cost‑effective scalability.
Learn how to design a robust, high‑performance seckill architecture that can endure millions of concurrent requests by breaking down business flow, defining precise technical metrics, and implementing a four‑layer system—access, traffic‑shaping, business logic, and data—using CDN, APISIX, Redis, RocketMQ, and MySQL with detailed code examples.
This article explains service avalanche in micro‑service chains, outlines its three failure stages, compares circuit‑breaker and degradation techniques, shows when to apply each, and provides practical guidance on tools like Sentinel and Resilience4j, testing, monitoring, and best‑practice configurations.
This article explains how to design a highly available comment system that can handle millions of concurrent users by analyzing comment fundamentals, traffic patterns, storage choices, caching layers, sharding strategies, architectural evolution from monolith to distributed micro‑services, and fault‑tolerance mechanisms.
This article breaks down the design of a high‑traffic like service, detailing four core requirements—speed, accuracy, stability, and cost control—while recommending Redis, a message queue, and MySQL, and illustrating the full architecture from frontend to persistence with practical code examples and optimization tips.
