LinkedIn grew from a single monolithic Leo server handling all web requests to a complex ecosystem of over 750 independent services, employing graph databases, read replicas, caching layers, Kafka pipelines, Rest.li APIs, and multi‑data‑center deployments to support billions of daily queries.
The article shares practical lessons from a year of backend R&D experiments at Weibo, describing how a bottom‑up hybrid‑cloud solution, cross‑team collaboration, and systematic team‑building transformed the Feed service’s scalability, cost efficiency, and alignment with business goals.
This article introduces fifteen powerful PHP libraries—from testing tools like Mink to HTTP clients such as Requests and caching solutions like Stash—highlighting their key features and how they can accelerate backend development and improve web application performance.
This article introduces the Spring Framework, explains its layered architecture and core modules, and details fundamental concepts such as Dependency Inversion Principle, Dependency Injection, BeanFactory, BeanDefinition, and ApplicationContext, along with practical Java‑based configuration and annotation‑driven wiring examples.
This article examines the kernel‑mode iSCSI Enterprise Target (IET), detailing its component modules (ietadm, ietd, iscsi_trgt), the interaction flow between initiators and the target, and the internal I/O processing pipeline, including thread allocation, work queues, and backend storage handling.
This article explains the layered architecture of Alibaba's open‑source Dubbo framework, detailing its service, config, proxy, registry, cluster, monitor, protocol, exchange, transport, and serialization layers, as well as service definition, registration, monitoring, communication protocols, and package organization for building distributed backend services.
This article explains why consistent PHP coding standards—covering line breaks, spacing, naming, and habits like method chaining and array formatting—are essential for readable, maintainable code, and offers practical examples and tools to enforce them across a development team.
Drawing on fourteen years of hands‑on experience, the article chronicles how a website’s architecture matures from a simple personal homepage to a billion‑page‑view enterprise system, highlighting the essential principles, design patterns, operational practices, and scalability strategies that underpin successful large‑scale web platforms.
This article shares a 14‑year journey of building and evolving website architectures, from a simple personal homepage to billion‑page platforms, highlighting essential accumulation, knowledge structuring, design principles, infrastructure, software engineering practices, and the nuanced differences across business systems.
The article outlines VIP's transition from a simple outlet‑style e‑commerce platform to a multi‑brand flash‑sale service, detailing each architectural phase—from a monolithic LAMP stack through vertical silo and distributed service‑oriented designs—to a cloud‑native, platform‑plus‑application model that supports scalable, high‑availability operations.
This article details Tuniu’s transformation from a single‑machine system to a large‑scale distributed architecture, covering the step‑by‑step serviceization process, the evolution of its price‑calculation service, the implementation of a service‑governance platform, data‑center migration challenges, performance‑optimization tools, and the technical evolution of its mobile app client.
This article introduces Sina Weibo's Motan RPC framework, compares RPC with other remote‑call technologies, explains Motan's modular architecture and high‑availability features, and details recent hybrid‑cloud adaptations such as traffic compression, dynamic group‑based routing, and extensible command‑driven traffic control.
The article examines how early‑stage startups can evaluate less‑common programming languages—Python, Ruby, Node.js, and Go—by weighing their disadvantages such as dynamic typing challenges, limited community support, hiring difficulties, and performance constraints, and explains why a mixed Python‑Go stack may balance rapid development with long‑term stability.
This article explores Python's role in Industrial Light & Magic's visual effects for Star Wars, introduces the Star Wars API, and demonstrates Python scripts that query film data and build a simple Star Wars-themed game.
The article shares a veteran engineer’s fourteen‑year journey from a simple personal homepage to a billion‑page‑view e‑commerce platform, outlining essential principles, knowledge structures, design philosophies, infrastructure choices, and operational practices needed to build and maintain large‑scale web systems.
This article explains how to install PHP 7, configure key performance features such as Opcache, HugePages and PGO, compares its speed with PHP 5.6 and HHVM using real‑world benchmarks, and discusses compatibility considerations for popular platforms like WordPress and Magento.
The article presents nine speculative trends for the next five years in programming—covering REST‑based IoT, a resurgence of binary protocols, video overtaking HTML, ever‑more capable smartphones, massive databases, JavaScript dominance via code‑generation bots, PHP’s comeback, widespread coding education, and managerial overreach—while stressing the inherent uncertainty of tech forecasts.
Learn how to quickly set up a Python 3.4.3 development environment using pythonbrew, create a virtual environment, and install essential packages like Django 1.7 and Selenium, with step‑by‑step commands and tips for efficient workflow.
This article explains how microservices emerged to address low development efficiency, technology incompatibility, and resource waste, and describes their benefits such as faster deployment, technology flexibility, optimal resource use, and improved stability, while also noting performance challenges.
This article explains the challenges of ensuring data consistency across multiple databases during operations like Alipay transfers, introduces local and distributed transactions, details the two‑phase commit protocol, and shows how reliable messaging can replace heavyweight distributed transactions for high‑concurrency systems.
This article investigates the conditions under which Node.js’s drain event is emitted, explores its relationship with socket.write’s return value and highWaterMark, demonstrates experiments with TCP and HTTP streams, and shows how to implement proper back‑pressure handling using pause/resume or pipe.
This guide shows how to create a minimal Python WSGI server that can run Django, Flask, and Pyramid applications without modifying server or framework code, explains WSGI fundamentals, provides step‑by‑step setup, code snippets, testing commands, and demonstrates the server‑framework interaction.
The article explains the internal and external drivers behind website architecture evolution, outlines the U‑N‑S‑C model, describes scaling steps such as service separation, caching, clustering, load balancing, database read/write splitting, CDN, and highlights the operational and organizational challenges of each phase.
The article examines the fundamentals of message‑based distributed architecture, explains core messaging patterns such as Message Channel, Publisher‑Subscriber and Message Router, and provides practical application scenarios, technology‑selection criteria, and challenges for building robust enterprise integration solutions.
Facing massive traffic spikes during events like Double‑11, Haier’s e‑commerce platform adopted a SOA architecture built on Dubbo, designed a flexible product service with a DSL‑driven query engine, and achieved high performance, linear scalability, and extensibility across diverse product categories.
The article chronicles a developer’s journey from a simple personal homepage to managing billion‑visit web platforms, sharing practical insights on architecture evolution, knowledge structures, design principles, infrastructure, and software engineering practices essential for building and operating large‑scale websites.
This article explains how a unified LAMP-based solution enables fast development, automated testing, and streamlined operations for large‑scale online services, detailing the architecture’s layers, tooling, and future directions for standardization and platformization.
This article presents a step‑by‑step case study of locating and fixing a memory‑leak problem in Baidu's Bigpipe Broker backend by analyzing a running leaking process with GDB, pmap, and custom scripts, highlighting the pitfalls of Valgrind and the importance of clear function naming.
This article describes how to create a “fastest‑first” load‑balancing algorithm for NGINX using OpenResty and Lua, including the design principles, modifications to lua‑upstream‑nginx‑module, weight‑adjustment logic, Docker build steps, and practical considerations for handling latency‑based server weighting.
In this interview, Xiaomi R&D architect Ouyang Chen shares the design philosophy, evolution stages, core modules, pitfalls, and future challenges of the Xiaomi advertising platform, offering practical insights for building scalable backend systems.
Learn a comprehensive set of 30 practical PHP best‑practice tips covering file inclusion, path handling, debugging, output buffering, security, performance, database interactions, session management, and code organization to improve maintainability, efficiency, and reliability of your backend applications.
This article outlines the common pitfalls programmers face on the path to web architecture, emphasizes mastering object‑oriented fundamentals, design patterns, and refactoring, and provides a detailed roadmap of the technical, operational, and managerial knowledge required to become a competent web architect.
This article compares the two popular Node.js version managers, nvm and n, examining their installation methods, system support, handling of global modules, and path configuration to help developers decide which tool best fits their workflow.
The article details the author's multi‑month effort to replace SQL Server persistence in the open‑source EQueue message queue with a high‑performance local file storage solution, covering the motivations, design considerations, chunked binary file format, write‑and‑read mechanisms, and flushing strategies.
The article details how Weibo evolved from a LAMP‑based first generation to a third‑generation, orthogonal three‑layer (interface, service, resource) and four‑vertical (business, technology, monitoring, governance) architecture that supports massive high‑availability, high‑concurrency workloads with middleware such as Web V4, MCQ, Motan, object store, SSDCache, and the WatchMan distributed tracing system.
An in‑depth comparison of PHP 7 and Facebook’s HHVM examines their origins, compilation approaches, real‑world benchmark results on platforms like WordPress and Drupal, and adoption by companies such as Wikimedia and Etsy, helping developers decide which backend runtime best suits their web projects.
This article outlines the four‑layer architecture of Weibo’s recommendation system—front‑end (RFront), application (RApp), compute (RCompute), and data (RStore)—detailing each layer’s purpose, technologies such as CRF, nginx+Lua, C++ frameworks, and supporting tools for logging, monitoring, and evaluation.
This article explains how to measure a system's load capacity, identifies key factors such as bandwidth, hardware, and OS settings, and provides practical optimization techniques for Linux, Nginx, Tomcat, and databases to achieve higher concurrency and better performance.
The fourth ESCC domestic developer conference held at Ctrip's headquarters in Shanghai gathered around 100 engineers to share ElasticSearch product roadmaps, core search system experiences, Kibana 4 features, and best practices for building high‑throughput ELK clusters.
This article traces Node.js’s evolution from a modest 2009 V8‑based runtime to a dominant backend platform, highlighting npm’s impact, its event‑driven, non‑blocking architecture, real‑world strengths and limitations, and why careful evaluation is essential before adopting it.
This article details how 58.com’s Bangbang system evolved from a traditional IM platform to a massive, multi‑layered architecture handling over 40 billion daily requests, covering its four‑layer design, third‑party integration challenges, client lightweighting, and the push technologies that power its mobile O2O services.
This article explains the fundamentals of REST APIs, outlines HTTP methods, recommends JSON payloads, and details authentication, authorization, URL filtering, encryption, rate limiting, error handling, and other security measures for building robust backend services.
This article traces the evolution of Weibo’s recommendation architecture across three major phases—independent 1.0, layered 2.0, and platform‑centric 3.0—detailing the environmental drivers, technical components, advantages, shortcomings, and key outcomes of each stage.
This article introduces Celery, a Python‑based distributed task queue, explains its three‑part architecture, shows how to install RabbitMQ and Celery on an AWS EC2 Linux instance, and provides step‑by‑step code examples for defining tasks, running workers, and retrieving asynchronous results.
This article introduces essential PHP development tools and standards—including PSR specifications, Composer dependency management, php‑cs‑fixer formatting, PsySH REPL, and popular frameworks like Laravel, Symfony, and Yii—explaining their purposes, core features, and how they improve modern backend workflows.
This article introduces fifteen powerful PHP libraries—from testing tools like Mink and Parody to networking utilities such as Requests and Unirest—detailing each library’s purpose, key features, and usage, helping backend developers accelerate web development and enhance application capabilities.
Apache offers three core Multi-Processing Modules—prefork, worker, and event—each with distinct process/thread models, memory usage, and suitability for high-concurrency scenarios, and this article explains how they work, their trade-offs, and why event MPM is the most memory-efficient choice.
This article explains the PHP RFC that introduces four new scalar type declarations (int, float, string, bool) and the declare(strict_types=1) directive, comparing strict and weak type checking, showing code examples, and discussing the rationale and impact on existing codebases.
This article explains how to create an asynchronous MySQL proxy server using the Swoole extension, detailing connection pooling, idle/busy management, request queuing, and providing a complete PHP implementation that reduces MySQL load and network overhead for PHP applications.
This article explains the three core components of SOAP web services—SOAP, WSDL, and UDDI—detailing their XML structures, message envelopes, headers, faults, and providing concrete request and response examples while also comparing development approaches and the role of UDDI.
The article examines why PHP’s lack of native multithreading isn’t a fatal flaw for high‑concurrency servers when paired with Swoole, compares process‑based and thread‑based models, debunks performance myths, and highlights the productivity benefits of using PHP over C++.
A series of internal technical talks covers engineering Node.js development and operations, fast SEO and watcher solutions, native module creation, code elegance principles, rapid Chrome plugin development, and the future of web componentization, inviting staff to attend on September 19.
This article explores why Laravel has become the most successful PHP framework, highlighting its modular architecture, extensive package ecosystem, micro‑service support through Lumen, elegant routing, middleware security, caching, authentication, task automation, encryption, ORM, testing, and queue handling.
Although many claim PHP with Swoole is unsuitable for high‑concurrency servers compared to C++, this article explains how PHP’s process model, Swoole’s Table and Atomic features, and careful design can achieve comparable performance while offering faster development, and discusses the trade‑offs of multithreading versus multiprocessing.
PHP 7.0 RC2, released Friday, delivers up to 2‑2.5× speed improvements over PHP 5.3‑5.6 while using less memory, introduces a new Zend Engine with 64‑bit support, exception‑based fatal errors, null coalescing, combined comparison, return and scalar type declarations, anonymous classes, and more.
The article describes Meituan's supply chain platform evolution from a manual, low‑volume system to a highly automated, multi‑business supporting architecture, detailing its stages, modular product center design, and the platform‑plus‑differentiation approach that enables rapid scaling across various services.
The article shares Meiya's journey from a small startup to a full‑featured beauty video platform, detailing common early‑stage challenges, communication and protocol strategies, RESTful API design, development workflow, toolchain choices like Laravel, DB migrations, iOS libraries, ELK logging, and DevOps automation with SaltStack.
This guide explains how to achieve high‑availability Tomcat session sharing in a clustered environment by installing and configuring MSM (Memcached Session Manager) with Memcached, setting up Nginx as a load balancer, and demonstrating failover handling for both Tomcat and Memcached nodes.
The article explains the origin of RESTful architecture, defines its key concepts of resources, representations, and state transfer, outlines how HTTP verbs map to operations, and highlights typical design mistakes such as verb‑laden URIs and versioning in the URI path.
NGINX achieves high performance and scalability by using a multi‑process architecture with a single master process, multiple single‑threaded non‑blocking worker processes, and dedicated cache loader/manager processes, limiting worker count per CPU core and handling many connections via an event‑driven state machine.
This article chronicles Java's origin in the mid‑1990s, its rapid growth, challenges, open‑source transformation, and enduring impact on backend development, cloud, big data, and mobile platforms, while projecting its continued relevance for the next two decades.
This article introduces the latest PHP language features—including namespaces, traits, closures, generators, and a range of new syntax enhancements—explaining their purpose, usage, and code examples to help developers build modern, maintainable web applications.
This article reviews common Redis clustering methods, compares Twemproxy and Codis, presents Codis’s architecture and performance test results, and offers migration, HA, pipeline, and operational guidance for using Codis as a Redis distributed middleware solution.
This article analyzes common push‑service questions, presents a real‑world IoT case of memory leakage, and outlines key design points—including kernel limits, CLOSE_WAIT handling, heartbeat configuration, buffer management, memory pooling, logging pitfalls, TCP tuning, and JVM settings—to build a scalable, stable Netty‑based push server for millions of concurrent connections.
gRPC, an open‑source RPC framework built by Google on HTTP/2 and Protocol Buffers, offers strong IDL capabilities, multi‑language support, and efficient streaming that reduce bandwidth, CPU usage, and battery drain, making it ideal for low‑latency, scalable backend and mobile client architectures.
This article explains the fundamentals of web servers, application servers, and web containers, describes the Java Servlet API—including Servlet, ServletContext, ServletRequest, ServletResponse, and session handling—and provides guidance on thread safety with illustrative code examples.
Throughout 2014 Java cemented its status as a versatile, widely adopted language, highlighted by RedMonk’s popularity ranking, the Java 8 release with lambdas, Nashorn, and new Date/Time API, ARM64 support, a revitalized JCP, expanding OpenJDK membership, and growing community initiatives.
Discontent with Joyent’s corporate stewardship prompted several core Node.js developers to fork the runtime into Io.js, releasing a V8‑upgraded alpha in January 2015, a move that highlights open‑source governance tensions and could reshape backend adoption by offering a more autonomous, community‑driven platform.
These practical PHP snippets demonstrate how to implement a blacklist filter, generate random colors, download files, retrieve Alexa/Google page rank, force file downloads, display Gravatars, fetch RSS subscriber counts, calculate time‑ago strings, crop images, and check website availability, streamlining everyday development tasks.
This article shares personal experiences and actionable advice on navigating Django's extensive official documentation, emphasizing selective reading, using the docs as a problem‑solving tool, and combining practice with teaching to deepen understanding for backend developers.
This article explains how to use Guava’s functional programming features in Java, covering Functions and Predicates, providing code examples, discussing potential pitfalls such as overly verbose anonymous classes, and offering guidance on when to prefer functional versus imperative approaches.
This article summarizes Arun Manivannan's six‑post series that uses clear analogies and simple Akka examples to explain the Actor model, its message‑passing semantics, lifecycle, hierarchical structure, fault‑tolerance mechanisms, and cross‑platform implementations for building concurrent backend systems.
Software maintenance and debugging sharpen analytical and coding skills, expose developers to diverse tools and legacy systems, improve performance optimization and database knowledge, foster client relationships and referrals, provide steady income, and allow quick, focused work that deepens business understanding while avoiding large‑scale outsourcing.
After a rushed fix for a division‑by‑zero bug caused incorrect results, the team learns to validate data at its source, adopt proper validation frameworks, and step back to understand underlying requirements, emphasizing that thoughtful design outweighs quick code patches.
This guide reviews fifteen top modern PHP frameworks—including Yaf, Nette, Guzzle, Phalcon, and others—highlighting their performance, security, ease of use, and specialized features such as C‑based extensions, lightweight databases, and behavior‑driven development to help developers quickly build efficient, dynamic web applications.
The article details Douban’s platform architecture, covering online services, the BeansDB key‑value store, the DAE PaaS layer, offline big‑data processing with MooseFS and DPark, and the team’s engineering practices that keep the system reliable and extensible.
Y Combinator’s study of 90 startups shows Ruby on Rails edging out Python for the top web‑development platform, while Python/Django dominates backend work, and languages such as C++, Scala, Go, Haskell, Clojure and Node.js are chosen for performance‑critical storage, data analysis, AI, finance and API services.
After weeks of puzzling over intermittent socket disconnections in a persistent‑connection server, the author finally traced the fault to a missing timeout/notification when the remote service drops while awaiting an authentication code—a revelation sparked by a noisy office party, a spilled cola, and a missed elevator.
In this interview a veteran full‑stack engineer shares his career path, explains Java 8’s key features such as lambda expressions and JavaFX enhancements, offers practical advice for programmers, and discusses the complementary roles of NoSQL and relational databases, highlighting MongoDB’s strengths.
HHVM, Facebook’s high‑performance PHP virtual machine, uses a type‑driven tracelet JIT and custom bytecode to achieve up to nine‑fold speed gains, making runtime optimization the only practical solution for Facebook’s massive codebase while requiring careful compatibility testing, memory management, and Hack language support.
