This article explains why caching is essential for high‑performance data retrieval, compares LRU and LFU eviction policies, presents three Redis‑based cache implementations, and discusses consistency challenges and solutions such as eviction ordering, consistent hashing, and delayed eviction in distributed systems.
This guide explains why MySQL replication can fail with errors 1452, 1032, and 1062, analyzes each root cause, and provides both quick‑fix procedures and a permanent solution using pt‑table‑checksum and pt‑table‑sync to keep master‑slave data consistent.
LinkedIn’s engineering team details how they scaled Kafka from a few billion to over a trillion daily messages, covering quotas, a new ZooKeeper‑free consumer, reliability upgrades, security roadmaps, monitoring frameworks, failure testing, cluster balancing, and ecosystem integrations.
This article analyzes flash‑sale (抢购) business scenarios, outlines a layered architecture separating business and data layers, explains decoupling front‑end pressure, uses Redis‑based queues and caching to manage high‑frequency inventory checks, and describes multi‑party reconciliation mechanisms to ensure reliable stock consistency under extreme load.
The May 7 Tencent SNG & msup Technology Open Day featured a front-end session where Mo Zhuoying shared practical methods for building a high-quality, high-efficiency front-end engineering system, covering development, pipeline, testing, release, monitoring, and the automation that drives productivity across billions of users.
The article details how to set up isomorphic ReactJS server‑side rendering using ReactDOMServer, Redux for shared state, and React Router for universal routing, covering data fetching, Webpack builds for client and Node, code‑splitting, and performance trade‑offs such as CPU overhead and caching strategies.
The article uses the Starbucks coffee‑making workflow as an analogy to explain how clustering, stateless task handling, service‑oriented design, asynchronous interfaces, and fault‑tolerant mechanisms together enable traditional systems to become highly scalable microservices on the cloud.
The article narrates the story of a fresh graduate named Xiao Wang who, through curiosity, proactive learning, helping others, and continuous technical improvement, rises from filling simple framework templates to leading a team and being appointed as a product architect, illustrating the path to senior technical roles.
This article outlines ten practical guidelines for operations engineers—ranging from mandatory rollback testing and cautious handling of destructive commands to robust backup verification, vigilant monitoring, and disciplined handover procedures—to dramatically reduce system outages and improve overall reliability.
This article introduces six fundamental design patterns—Singleton, Adapter, Observer, Simple Factory, Factory Method, and Abstract Factory—explaining their concepts, class diagrams, and providing complete Java code examples to illustrate each pattern's practical implementation.
This article shares eBay’s seven core scalability best practices—including functional partitioning, horizontal sharding, avoiding distributed transactions, asynchronous decoupling, stream processing, virtualization, and smart caching—to help architects design highly available, cost‑effective systems that can handle billions of daily requests.
This article explains the three common cache problems—penetration, concurrency, and expiration—illustrates why they occur in high‑traffic systems, and provides practical techniques such as pre‑setting placeholder values, locking, and randomizing TTLs to keep databases healthy.
The article presents a low‑cost, high‑precision approach for measuring mobile web first‑screen load time by streaming the device screen to a computer via STF and applying Sikuli image‑recognition scripts to automatically detect when the first screen is fully rendered.
The article explains why and how to properly delete or disable unused code, emphasizing the use of source‑control systems, clear commenting, conditional compilation, and disciplined cleanup to reduce noise, uncertainty, and maintenance overhead in software projects.
A performance test using sysbench on a dual‑node DL380 G7 MySQL 5.6 cluster shows that semi‑synchronous replication delivers roughly one‑third the TPS of asynchronous replication and highlights recovery and replication‑lag limitations that can be mitigated with sharding and parallel workers.
This article presents a collection of fifteen C programming quiz questions, each accompanied by the original code, multiple‑choice options, the correct answer, and in‑depth explanations covering topics such as setjmp/longjmp, pointer casting, recursion, sizeof, function pointers, variadic functions, and static variables.
This guide explains three practical methods—using df, mount -l, and reading /etc/mtab—to list Linux mount points together with their associated disks or logical volumes, highlighting each command's output format and limitations.
Discover 26 practical agile development principles—from building test cases before code to avoiding premature optimization—that guide teams to deliver high-quality software efficiently, emphasizing incremental work, continuous testing, thoughtful design, and disciplined code management.
This article details the design, performance challenges, and optimization techniques of a high‑throughput push notification platform that serves 25 million concurrent users, processes 5 billion daily page views, and delivers up to 6 million messages per minute.
mmtls is a custom, lightweight secure communication protocol designed for WeChat that encrypts all client‑to‑server traffic, offering confidentiality, integrity, low latency, scalability, and forward secrecy by adapting TLS 1.3 concepts with optimized handshake, key‑exchange, record, and replay‑protection mechanisms.
