This article explores server clustering and load‑balancing fundamentals, detailing how LVS, Nginx, and HAProxy operate at different OSI layers, their deployment scenarios, architectures, modes, strengths, and weaknesses, and offers practical guidance for choosing the right solution in modern backend systems.
Load balancing distributes traffic across multiple servers to improve performance, ensure high availability, and enable scalability, covering concepts such as vertical and horizontal scaling, business partitioning, various load‑balancing methods (DNS, HTTP, IP, layer‑2, hybrid), and common algorithms like round‑robin, random, least connections, hash, and weighted distribution.
Load balancing distributes incoming traffic across multiple servers to improve performance, ensure high availability, and enable scalability, and this article explains its core principles, various classifications such as DNS, IP, layer‑2 and hybrid methods, and common algorithms like round‑robin, least connections, hash and weighted distribution.
This article examines the challenges of handling millions of concurrent QQGame players, explains why client‑side room‑count replication is essential, and proposes a divide‑and‑conquer, scale‑out server cluster with autonomous room and region managers to achieve high availability and data consistency.
The article analyzes QQGame’s room‑entry failures caused by massive concurrent users, explores the limits of client‑side data synchronization, and proposes a scalable backend architecture using region‑based partitioning, autonomous server processing, and distributed database sharding to achieve high availability and data consistency.
This article explains the concept of load balancing, compares DNS, hardware, and software based solutions, and details common balancing algorithms such as round‑robin, load‑aware, response‑time, and hash strategies for building high‑performance server clusters.
This comprehensive guide explains why load balancing is essential for high‑traffic websites, details vertical and horizontal scaling, compares DNS, IP, link‑layer, and hybrid approaches, outlines common algorithms such as round‑robin and weighted, and reviews hardware versus software solutions.
This article explains the definitions, real‑world analogies, practical applications, and fundamental differences between forward (client‑side) and reverse (server‑side) proxy servers, helping developers and operators grasp why these concepts matter for access control, performance, and security.
This article explains the architecture and mechanisms of Alibaba Cloud's Table Store load‑balancing system, detailing how it collects metrics, detects user‑access and machine hotspots, and automatically applies actions such as partition moves, splits, merges, and isolation to maintain high availability and performance.
DPVS is an open‑source, DPDK‑based user‑space load balancer that achieves line‑rate throughput by assigning each worker to a dedicated CPU core and NIC queue, provides lock‑free per‑CPU data structures and multiple forwarding modes including NAT64, and simplifies maintenance while supporting IPv4/IPv6 in large‑scale production deployments.
Using a vivid Journey to the West allegory, this article walks through cloud networking fundamentals—from regions, availability zones, and VPCs to BGP routing, DNS resolution, TCP handshakes, TLS encryption, load balancing, and micro‑service communication—illustrating each concept with clear diagrams and analogies.
This article explains what API gateways are, why they are essential in micro‑service architectures, outlines the cross‑cutting concerns they address such as authentication, transport security, load balancing, request routing, dependency resolution and data transformation, and provides a practical Node.js implementation with code samples.
This article examines the technical challenges of handling massive concurrent traffic during flash‑sale events, explains why backend APIs become bottlenecks, and presents practical strategies—including request design, overload protection, anti‑abuse measures, and data‑safety techniques such as pessimistic, FIFO, and optimistic locking—to keep web systems stable and performant.
This guide walks through planning server IPs, installing and configuring keepalived for high availability, crafting master and backup keepalived.conf files, creating a Tomcat health‑check script, monitoring logs, handling failover, and resolving common errors on Linux systems.
Meitu’s container platform, built on Kubernetes with Calico networking, a custom Nginx load‑balancer, unified logging, refined scheduling, autoscaling, and comprehensive monitoring, enables seamless multi‑cluster hybrid‑cloud operations for its hundreds‑of‑millions‑user services while providing CI/CD tooling and future‑ready extensions such as service mesh and edge computing.
This comprehensive guide explains the concepts, architecture, and operation principles of Linux Virtual Server (LVS) load‑balancing clusters, details the NAT, DR, and Tun modes, compares scheduling algorithms, and provides step‑by‑step scripts and commands for setting up high‑availability LVS environments with keepalived.
This article details SuNing Financial’s red‑envelope platform architecture and evolution, covering high‑concurrency challenges, traffic shaping, asynchronous processing, multi‑level caching, Redis‑based distributed locks, task scheduling, payment‑chain isolation, high‑availability deployment, multi‑layer flow control, monitoring, and future scalability directions.
This article traces the historical shift from program‑centric sockets to service‑oriented architectures, explaining how performance, stability, and access control drove the rise of load balancing, DNS, service governance, micro‑services, and ultimately cloud‑native service‑mesh solutions like Istio.
This article explains a practical, simplified microservices architecture that focuses on essential components such as service registry, discovery, load balancing, and API gateways, and provides step‑by‑step guidance on implementation, deployment, and operations to improve development speed, maintainability, and scalability for typical enterprise projects.
This article explains how UCloud addresses IPv4 limitations by deploying a free IPv6 conversion service built on stateful NAT64 and programmable P4 switches, detailing the strategic rollout, system architecture, high‑availability and security mechanisms, load‑balancing algorithms, P4 table optimizations, and performance test results.
This article provides a comprehensive guide to Nginx, covering its purpose as a lightweight web and reverse‑proxy server, step‑by‑step installation on Linux and Windows, essential command‑line controls, and detailed configuration examples for HTTP reverse proxy, load balancing, multiple webapps, HTTPS, static sites, and CORS handling.
This article explains the concept of load balancing, compares HTTP redirection, DNS‑based balancing, reverse‑proxy solutions, and Linux Virtual Server techniques (LVS‑NAT, LVS‑DR, LVS‑TUN), detailing their mechanisms, advantages, limitations, and practical configuration commands for building scalable, high‑performance server farms.
This article details the core capabilities of Nginx without third‑party modules, including reverse proxy, various load‑balancing strategies, static and dynamic HTTP serving, forward proxy setup, and hot‑reload commands, providing clear configuration examples for each feature.
This article examines how Uber built and scaled its real-time ride-sharing platform, detailing the original simple PHP-MySQL architecture, subsequent extensions with message queues, MongoDB, Ringpop storage, TChannel communication, fault-tolerance strategies, latency challenges, and practical tools for distributed system design.
This article introduces the concept of load balancing as a key high‑availability technique, explains five common strategies—round robin, weighted round robin, least connections, fastest response, and hash—provides code examples, compares their pros and cons, and outlines health‑check methods to ensure reliable service.
This article describes the architecture, components, and deployment strategies of the 58 deep learning online prediction service, covering TensorFlow‑Serving, custom model serving, traffic forwarding, load balancing, GPU configuration, resource monitoring, and the supporting web management platform.
This article walks through a typical e‑commerce order‑payment scenario to illustrate how Spring Cloud’s core components—Eureka for service discovery, Feign for declarative HTTP clients, Ribbon for client‑side load balancing, Hystrix for fault isolation and circuit breaking, and Zuul as an API gateway—collaborate to build resilient microservices.
This article provides a comprehensive analysis of Pigeon, a point-based open-source RPC framework used by the company, covering its client-side invoker, server-side provider, call flows, Zookeeper integration, service isolation, and operational features.
This article explains load balancing as a clustering technology that distributes network services across multiple devices or links to improve performance, scalability, reliability, and manageability, and it details various types, strategies, and algorithms used in modern networks.
This article explains why session loss occurs when using hash‑based load balancing, illustrates the problem with Nginx ip_hash, and compares three mitigation strategies—sticky sessions via nginx‑sticky‑module, session replication, and session sharing—highlighting their advantages, drawbacks, and suitable scenarios.
This article presents Lest, a persistent KV‑store cache designed to overcome the limitations of traditional in‑memory caches by combining disk‑based persistence, lock‑free multithreading, custom protocols, and advanced load‑balancing, and it evaluates its performance on petabyte‑scale workloads.
This article explains the core capabilities of Nginx without third‑party modules, covering reverse proxy, load balancing (including round‑robin, weight, ip_hash, fair, and url_hash), static HTTP serving with dynamic/static separation, forward proxy configuration, and hot‑reload commands.
This article outlines a comprehensive, multi‑layer web architecture covering front‑end optimization, application‑level frameworks, service‑oriented components, storage solutions, backend analytics, monitoring, security measures, and data‑center design for building highly scalable and reliable websites.
This article explains what load balancing is, compares it to navigation routing, and details five common strategies—round‑robin, weighted round‑robin, least connections, fastest response, and hash‑based—along with their pros, use‑cases, and health‑check mechanisms for achieving high availability.
This article explains the concept of a simple microservices architecture, outlines essential components such as service registry, discovery, load balancing and API gateway, compares three load‑balancing approaches, and provides concrete implementation guidance using Eureka, Ribbon, Zuul and related DevOps practices.
This guide explains how to set up HAProxy, covering core concepts such as ACLs, backends, frontends, optional statistics, a complete configuration example, and step‑by‑step deployment on Linux, enabling you to quickly build a reliable load‑balancing proxy.
This article explains the fundamentals of load balancing, compares DNS‑based, hardware, and software solutions, and details common balancing algorithms such as round‑robin, load‑aware, response‑time, and hash strategies, helping architects choose the right approach for high‑performance systems.
This article explains the concept of load balancing, compares DNS‑based, hardware‑based, and software‑based solutions, and details common balancing algorithms such as round‑robin, load‑aware, response‑time, and hash strategies, highlighting their advantages, limitations, and typical use cases in high‑traffic systems.
This guide walks through planning server and software environments, installing and configuring keepalived on Red Hat Enterprise Linux 5, creating master‑backup VRRP instances, integrating a Tomcat health‑check script, monitoring logs, testing failover, and troubleshooting common errors.
The article shares three detailed production incidents—an Oracle overload, a blockchain media service overload, and a 502 failure in an Nginx‑Tomcat rental app—explaining how the author diagnosed, mitigated, and permanently resolved each problem, and distilling key operational lessons.
The article outlines the architecture of large‑scale internet application platforms, detailing essential subsystems such as web front‑ends, load balancing, database clusters, caching, distributed storage, server management, and code deployment, and explains how they work together to achieve high availability, performance, and scalability.
This guide walks through installing Nginx on Linux and Windows, explains core commands, demonstrates HTTP reverse‑proxy setups, load‑balancing across multiple servers, HTTPS with SSL certificates, static‑site serving, and a practical CORS solution for cross‑origin requests.
This article outlines a layered architecture—including load balancing, CDN, caching, micro‑services, read/write separation and database clustering—to handle the massive data volume and high concurrency of modern e‑commerce platforms during peak events like Double‑11 and 618.
The article outlines the defining traits of large‑scale websites—high concurrency, massive traffic, high availability, and huge data volumes—and explains how their architecture evolves from a single‑server setup to layered, distributed systems using caching, load balancing, database read/write splitting, CDN, NoSQL, and service isolation.
GitHub’s GLB Director is an open‑source, layer‑4 load balancer designed for data‑center environments that scales a single IP across thousands of servers, uses ECMP, a stateless director layer, DPDK‑accelerated packet processing, and health‑check mechanisms to provide high‑availability without disrupting existing connections.
This article reviews mature service governance solutions such as Dubbo, HSF, Tars, Linkerd, and Istio, extracts common design principles, and provides practical guidance on implementing core functions like registration, discovery, and change propagation in distributed systems.
This article details a competition‑level solution that implements a high‑throughput HTTP server using a custom multi‑threaded epoll model, UDP‑based protocol conversion, sparse indexing, and optimized write‑read schemes to achieve top performance on limited‑resource hardware.
This guide walks through planning the server and software environment, installing and configuring keepalived, setting up master‑backup VRRP instances, monitoring logs, handling failover, checking virtual IPs, troubleshooting common errors, and adding a Tomcat service script for high‑availability Linux deployments.
This article explains how the open‑source Cetus middleware addresses MySQL read/write pressure by implementing master‑slave and inter‑replica load‑balancing strategies, configurable routing parameters, and performance optimizations that improve throughput, especially in long‑connection scenarios.
This article explains the concept of distributed architecture, its key properties such as cohesion and transparency, various applications like distributed file systems, caches, databases, and services, and outlines the evolutionary stages from single‑server setups to modern micro‑service and cloud‑native designs.
This article explains how to employ the open‑source ApacheBench (ab) tool to conduct load‑testing and dynamic monitoring of a Linux‑based load‑balancing module, detailing environment setup, command parameters, and result analysis for effective performance evaluation.
This article explains the fundamentals of distributed systems, outlines common use cases such as distributed file systems, caches, databases, and web services, examines real‑world examples like MyCat, and traces the architectural evolution from single‑server setups to modern micro‑service clusters.
This tutorial walks through setting up Nginx on Debian, configuring worker processes, events, and HTTP settings, defining upstream groups for load balancing, separating static and dynamic content with reverse proxy, enabling gzip compression, implementing proxy caching with shared memory, and adding SSL support with self‑signed certificates.
The article explains how Nginx achieves high concurrency, performance, and efficiency through its master‑worker process model, modular design, event‑driven non‑blocking architecture, and built‑in proxy capabilities, making it a leading web server for reverse proxy and load balancing.
This article explains the distinction between distributed systems and clusters, outlines cluster’s key features such as scalability and high availability, describes essential capabilities like load balancing and error recovery, details core technologies, classifies common Linux cluster types, and provides examples to illustrate their operation.
The article explains how the slowdown of Moore's Law drives the shift from monolithic applications to distributed systems, covering load balancing, session handling strategies, read‑write separation, and database sharding to achieve scalable, high‑availability backend architectures.
The article outlines the key characteristics of large-scale websites and traces their architectural evolution from single‑server setups to multi‑tier, cache‑enhanced, clustered, and distributed systems, highlighting strategies such as load balancing, database read/write separation, CDN usage, NoSQL adoption, and service‑oriented decomposition.
This article provides a comprehensive technical overview of large distributed website architecture, covering performance, high availability, scalability, security, and agility, and illustrates the evolution, design patterns, and practical optimization techniques for modern e‑commerce platforms.
This article explains the principles, architectures, and trade‑offs of three popular software load balancers—LVS, Nginx, and HAProxy—guiding you to select the right solution based on traffic volume, protocol layer, and operational complexity.
The article describes how the Nitro team designed and implemented a Go‑based consistent‑hashing router that leverages Nginx, the Redis protocol, Envoy sidecars, and Mesos to provide low‑latency, high‑throughput request routing and caching for compute‑intensive services.
This article outlines how a .NET‑based system evolves from a single‑server deployment to a multi‑layered, load‑balanced, clustered architecture with database sharding, distributed file storage, caching, micro‑service communication, and cloud services to handle high traffic and massive data volumes.
This article summarizes the evolution stages, architectural patterns, and key concerns such as performance, scalability, extensibility, high availability, and distributed design that large‑scale websites must address, providing practical insights and visual diagrams for each concept.
This article outlines practical strategies for building high‑concurrency back‑end systems—including server architecture, load balancing, database clustering, caching, message queues, asynchronous processing, and service‑oriented design—to ensure smooth operation of traffic‑intensive e‑commerce services.
This article explains the consequences of high‑traffic spikes, presents practical database and code‑level strategies to keep data consistent, and outlines server‑side architectures—including load balancing, caching, and Redis queues—to sustain massive concurrent requests without crashing.
This article introduces the DPRD hierarchical data placement strategy, explains its roots in the CRUSH algorithm, highlights CRUSH's migration inefficiencies, and details how DPRD achieves near‑theoretical replica movement and balanced distribution during both expansion and shrinkage of a distributed storage system.
This guide explains the session‑sharing problem caused by load balancing, introduces Redis as a shared storage solution, and provides step‑by‑step instructions—including php.ini changes, runtime ini_set calls, and a custom session‑handler class—to configure PHP to store sessions in Redis, with code examples and verification commands.
This article explains practical techniques for designing high‑availability and scalable architectures across entry, business, cache, and database layers, helping developers handle rapid user growth without service interruptions.
This article explores the technical challenges of handling massive concurrent requests in e‑commerce flash‑sale and ticket‑booking systems, covering backend interface design, performance bottlenecks, overload protection, cheating mitigation, and data‑safety techniques such as optimistic locking and queueing.
This comprehensive tutorial walks Linux operators through the principles and practical setup of high‑concurrency load balancing using LVS, covering architecture, DR/NAT/TUN modes, kernel tuning, ipvsadm commands, Keepalived high‑availability, and detailed testing procedures to ensure robust, scalable services.
This article explains the concept of high concurrency, outlines a server architecture that supports it—including load balancing, distributed databases, NoSQL caches and CDN—and presents practical testing methods and implementation patterns such as caching strategies and message‑queue designs to handle massive simultaneous requests.
This article explains the fundamentals of load balancing, compares Layer 4 (IP + port) and Layer 7 (HTTP/URL) approaches, outlines common software and hardware solutions, discusses technical and security implications, and reviews strategies and implementation considerations for optimal network performance.
This article explains Nginx's role as a lightweight web and reverse‑proxy server, clarifies forward vs reverse proxy concepts, details the master‑worker architecture, hot deployment, high‑concurrency handling with epoll, and shows how to achieve high availability and load balancing using Keepalived, upstream blocks, and caching.
This article walks through the step‑by‑step evolution of a Java website—from a single‑machine setup to a multi‑tier, load‑balanced, sharded, cached, and service‑oriented architecture capable of handling billions of requests—detailing the challenges and solutions at each stage.
The article outlines a step‑by‑step evolution of a web application from a single‑machine deployment to a fully distributed architecture, covering server separation, clustering, load‑balancing algorithms, session handling, read‑write splitting, search engine integration, caching, database sharding, service‑oriented decomposition, and message‑queue middleware.
This article explains the fundamentals of distributed architecture, outlines its main applications such as distributed file systems, caches, databases and services, reviews its evolutionary stages from single‑server to clustered and cloud‑native designs, and discusses common operational challenges.
This guide walks through installing, compiling, and configuring Keepalived across multiple Linux nodes to create a VRRP‑based high‑availability web service cluster, covering prerequisites, virtual IP setup, load‑balancing rules, and monitoring tools.
This article reviews cloud gaming resource management, introduces search‑engine instance distribution techniques, explores AI‑based disk‑failure prediction and load forecasting, and presents replica and DDoS‑detection strategies to improve efficiency and reliability of large‑scale distributed systems.
This article explores the defining traits of large‑scale websites and walks through the step‑by‑step evolution of their architecture—from single‑server setups to distributed systems with caching, load balancing, database sharding, and micro‑services—while highlighting common design pitfalls and best‑practice recommendations.
This article explores the core components of a microservice foundation framework—including gateways, DevOps, Docker, security, load balancing, and service discovery—examines centralized vs. in‑process load‑balancing strategies, and reviews Netflix’s open‑source stack (Eureka, Zuul, Hystrix, etc.) as a reference implementation.
Xinhua integrates Huawei Cloud infrastructure with Esri's ArcGIS portal via the eSDK platform to enable flexible, load‑balanced GIS services, real‑time monitoring, and efficient remote collaboration, improving geographic data handling for news reporting and public opinion analysis.
This article explains how server‑side service discovery enables clients such as API gateways to locate dynamically changing microservice instances via a router or load balancer that queries a service registry, outlining requirements, solution architecture, examples like AWS ELB, benefits, drawbacks, and related patterns.
This guide explains how Nginx's rate‑limiting works, covering the leaky‑bucket algorithm, basic directives, burst and nodelay options, whitelist handling, logging, custom error codes, and advanced configuration examples for securing and optimizing HTTP request traffic.
This article explains the concept of load balancing in distributed systems, outlines its benefits for throughput and reliability, compares common architectural layers, evaluates key algorithmic considerations, and provides Python implementations of round‑robin, weighted, random, hash‑based, and least‑connection strategies along with deployment options.
Envoy is a cloud‑native L7 proxy and communication bus designed for modern service‑oriented architectures, offering out‑of‑process deployment, language‑agnostic operation, modern C++11 implementation, extensive L3/L4 and HTTP L7 filtering, HTTP/2, gRPC, database protocol support, service discovery, health checking, advanced load balancing, edge proxy capabilities, observability, and dynamic configuration.
This article explains why and when to move to distributed architecture, outlines the typical upgrade and splitting steps, and details five common distributed cluster patterns—including load balancing, leader election, blockchain, master‑slave, and consistent hashing—highlighting their trade‑offs and use cases.
This article summarizes the origins, core principles, typical evolution stages, and common toolkits of large website architecture, highlighting how network growth, performance demands, and scalability challenges drive the adoption of caching, load balancing, database sharding, CDNs, and distributed services.
This comprehensive guide walks through the full lifecycle of enterprise system architecture, covering access‑chain analysis, network and hardware foundations, virtualization and container strategies, layered design, load‑balancing, database high‑availability, service segmentation, and operational safeguards such as CMDB, monitoring, and disaster‑recovery.
This article explains the relationships among Storm's core components, how parallelism is calculated from configuration parameters, and how Nimbus performs task assignment and load balancing across workers, supervisors, and executors in a distributed streaming topology.
The article describes how a company replaced costly commercial load balancers with an open‑source architecture based on Nginx for layer‑4 traffic and a layer‑7 cluster, detailing project background, technology selection, redundant design, network and Nginx configurations, operational scripts, performance testing, and data analysis.
This guide walks beginners through the fundamental components of microservice infrastructure—configuration management, service registry, API gateway, authentication, message broker, BFF, circuit breaker, and load balancing—explaining their roles, interactions, and practical considerations for building resilient systems.
This article explains the fundamentals of load balancing, compares layer‑2 to layer‑7 approaches, reviews popular software solutions such as LVS, Nginx and HAProxy, and details both static and dynamic balancing algorithms with practical implementation guidance.
This article explains the fundamentals of load balancing, compares four‑layer and seven‑layer approaches, outlines their roles and advantages, and reviews popular software solutions and typical application scenarios for modern large‑scale web infrastructures.
This article explains the concept of load balancing, compares HTTP redirection, DNS load balancing, reverse proxy, and various LVS methods (NAT, Direct Routing, IP Tunnel), discusses their advantages, limitations, configuration steps, and practical considerations for building scalable server architectures.
The 2017 Double‑11 festival shattered records with 168.2 billion yuan in sales, and Alibaba Cloud’s VPC, load‑balancing SLB, NAT gateway, and high‑speed hybrid‑cloud network together ensured the massive traffic and payment spikes ran smoothly for millions of shoppers.
This article explains how 360’s Linux Virtual Server (LVS) platform evolved with the FULLNAT forwarding mode, enhancing cross‑VLAN deployment, simplifying real‑server configuration, adding SYN‑proxy protection, and improving UDP handling, while detailing the new deployment architecture and operational benefits.
This article shares practical experience on evolving a single‑server Java monolith into a scalable architecture by introducing Nginx reverse proxy, separating services and static resources, adopting load‑balancing strategies, implementing distributed sessions, enabling read/write separation, and applying CI/CD tools such as Docker, Jenkins, Git, and Maven.
This article explains the evolution of Alibaba Cloud's high‑performance load balancing, covering early LVS modes, Tengine integration, architectural improvements, and multi‑region high‑availability designs that together deliver massive throughput, fault tolerance, and flexible deployment for cloud services.
This article reviews Alibaba Cloud's high‑performance load‑balancing solution, explaining the evolution from basic load‑balancing concepts to the architecture of LVS and Tengine, detailing their modes, optimizations, high‑availability designs across groups, AZs and regions, and outlining current use cases and future directions.
This article explains how load balancing and reverse proxy mechanisms such as Nginx, Consul, and Hystrix work together with various isolation strategies—including thread, process, cluster, data‑center, and resource isolation—to improve system reliability and scalability in large‑scale web architectures.
This article examines the technical challenges of handling massive concurrent requests during flash‑sale and ticket‑buying events, offering practical backend design, performance tuning, anti‑cheat measures, and data‑safety techniques to keep web systems stable under extreme load.
