The article explains why deploying only Tomcat without Nginx leads to scaling, cost, and reliability problems, and demonstrates how Nginx’s health‑check, failover, and virtual‑host features complement Tomcat to build a robust, production‑grade web architecture.
This article explains how Kubernetes routes traffic from a pod to a Service and back to another pod, details the role of kube‑proxy with iptables or ipvs, and discusses how long‑lived connections are managed and potential load‑balancing issues.
This article walks through the evolution from a single‑Tomcat deployment to a multi‑layer load‑balancing architecture using Nginx, a gateway, LVS, and DNS, explaining static‑dynamic separation, high‑availability strategies, and performance trade‑offs for scalable backend systems.
This article provides a comprehensive overview of Spring Cloud, detailing its core components—including Zuul, Eureka, Ribbon, Feign, Config, and Sleuth—their definitions, roles, underlying principles, and how they work together to enable robust microservice architectures.
This article explains how Kubernetes' kube-proxy component implements service discovery and load balancing using two modes—iptables and ipvs—detailing the underlying packet‑processing chains, NAT rules, probability‑based forwarding, and the performance differences between the two approaches.
This guide walks through installing Docker on Debian hosts, creating a Swarm cluster, exposing required ports, visualizing the cluster with Portainer, deploying sample services, scaling them, and implementing load balancing with Nginx, all illustrated with command snippets and screenshots.
This article provides a detailed, step‑by‑step tutorial on Nginx, covering its purpose, core features, installation on Linux, essential commands, configuration file structure, practical examples for static serving, reverse proxy, load balancing, HTTPS, security hardening, health checks, and load‑balancing algorithms.
This article explains the concept of high‑availability architecture and details eight practical solutions—including redundant servers, load balancers, data backup strategies, security measures, redundancy patterns, automated operations, and monitoring/alert systems—to help large‑scale sites achieve continuous, fault‑tolerant service.
This guide walks you through Nginx fundamentals—including its role as a web server, proxy, reverse proxy, and load balancer—followed by step‑by‑step installation, configuration examples, and essential commands for managing a production‑grade Nginx setup.
This article explains how IPVS (IP Virtual Server) provides layer‑4 load balancing in Linux, compares it with iptables, details its reliance on iptables, outlines the various LVS scheduling algorithms, and provides practical ipvsadm commands for setting up a load‑balancing cluster with real servers.
As AI workloads push intelligent compute power growth beyond 50% CAGR, data‑center networks face massive parallel paths, making traditional ECMP load‑balancing insufficient and causing severe congestion, while newer granular schemes such as packet‑spraying, flowlet, and cell‑based balancing offer higher bandwidth utilization and fairness.
Building a scalable backend requires a distributed architecture complemented by caching, optimized database queries, robust monitoring, message queues, load balancing, horizontal scaling with containers, CDN integration, auto‑scaling, and a microservices design to ensure performance, reliability, and seamless growth under increasing demand.
The article explains that the initial Feign request is slow because Ribbon lazily creates its load‑balancer client and fetches the service list from the registry, and shows how enabling Ribbon's eager‑load mode pre‑warms the client to eliminate the delay.
This tutorial walks through planning the NAT architecture, preparing hosts, configuring Linux route, LVS, and rs servers, installing httpd, setting up ipvsadm load‑balancing rules, testing client access via gateway or direct router IP, and persisting the configuration for a reliable Linux LVS NAT solution.
Bilibili’s downstream CDN was rebuilt from a tightly‑coupled scheduler model into a cloud‑native architecture featuring separate gateway, cache, back‑origin and control services that provide layer‑4 and layer‑7 load‑balancing, cluster‑wide health checks, centralized routing, and a refactored NGINX slice module, cutting latency by 40 % and dramatically reducing incidents.
This article explains what high concurrency is, why it matters for large‑scale systems, and presents practical techniques such as distributed caching, load balancing, database optimization, traffic shaping, and distributed architecture to dramatically improve a backend's ability to handle massive simultaneous requests.
This article explains why Nginx is renowned for high performance and details the architectural components—master and worker processes, event‑driven non‑blocking I/O, memory pooling, load‑balancing, caching, modular design, and proxy mechanisms—that enable it to sustain millions of simultaneous connections.
This article explains the role of Nginx load balancing, compares common algorithms such as Round Robin, Weighted Round Robin, and IP Hash, and provides a step‑by‑step configuration example with detailed parameter explanations for building a robust backend traffic distribution system.
This guide explains how to design and deploy a highly available web load‑balancing cluster using Linux Virtual Server (LVS) together with Keepalived, covering architecture, required software, configuration steps for both master and backup nodes, real‑server setup, and HA testing procedures.
This article explains the challenges of using WebSocket in a microservice environment, introduces a load‑balancing library that forwards messages between service instances, shows how to enable it with Spring annotations, and details the underlying connection, subscription, and selector mechanisms for reliable message routing.
This article presents a detailed case study of optimizing a distributed batch processing system by replacing static shard‑key concurrency with a dynamic task‑grabbing mechanism, dramatically reducing execution time from several hours to under fifteen minutes while maintaining stable resource usage.
This article explains the concept and importance of load balancing, then demonstrates a practical Docker‑Compose setup with multiple PHP containers and an Nginx reverse proxy, including configuration files and test results that show how traffic is distributed to improve system reliability and performance.
This article explains the role of load balancing in distributed systems and details five common strategies—Round Robin, Weighted Round Robin, IP Hash, Least Connections, and Least Response Time—highlighting their mechanisms, advantages, drawbacks, and suitable scenarios for optimal system performance.
By integrating Intel QuickAssist hardware and AVX‑512 software acceleration into the VUA component of Vivo’s load‑balancing platform, the article demonstrates asynchronous OpenSSL offloading that boosts HTTPS forwarding throughput to roughly 44 000 QPS with QAT cards and 51 000 QPS with software, while preserving scalability and security.
This article explains what a service gateway is in a microservice architecture, outlines its key responsibilities such as routing, load balancing, traffic control, security, and monitoring, and compares popular gateway solutions to help you choose the right one for your system.
This article explains how a high‑throughput, low‑latency flight search system handles billions of daily requests by employing multi‑level caching, distributed Redis and MongoDB stores, AI‑driven TTL optimization, and advanced load‑balancing techniques such as pooling and overload protection.
This article presents a comprehensive guide to high‑concurrency architectural techniques—including microservice decomposition, load‑balancing strategies, distributed caching, asynchronous processing, database sharding, message‑queue integration, rate‑limiting and circuit‑breaking, as well as distributed database options—targeted at building scalable backend systems.
This article introduces the NGINX Config visual generator, outlines its key features such as high‑performance static handling, reverse proxy, load balancing, and security options, and provides complete example configuration files with detailed code snippets for main, site, PHP, and security settings.
The article analyzes the extreme‑traffic challenges of the 12306 ticket‑seckill service, presents a layered load‑balancing architecture, compares inventory‑deduction strategies, and demonstrates a complete Go‑based prototype with Nginx weighted round‑robin, Redis stock management, and ApacheBench performance testing.
This article presents a systematic overview of essential distributed architecture concepts—including load‑balancing principles, message‑queue mechanisms, microservice design, Redis cache challenges, idempotency solutions, distributed ID generation, single sign‑on, and database sharding—offering practical insights for building high‑performance, scalable backend systems.
This article provides an in‑depth overview of load balancing, covering its necessity, functions, principles, algorithms, and classifications across OSI layers, and compares popular software solutions for implementing four‑ and seven‑layer load balancers in modern distributed systems.
This article explains the fundamentals of load balancing, covering its principles, classifications from layer 2 to layer 7, common software implementations, and typical application scenarios such as high traffic handling, horizontal scaling, fault tolerance, and multi‑zone disaster recovery.
This article explains why keeping the client source IP in an Istio service mesh matters, outlines the reasons for IP loss, and provides step‑by‑step solutions for north‑south and east‑west traffic using Service settings, traffic policies, and Envoy headers.
This article explains how Spring Cloud Commons abstracts service discovery, load balancing, and circuit breaker patterns, covering annotations like @EnableDiscoveryClient, SimpleDiscoveryClient configuration, service registration, RestTemplate and WebClient load balancing, network interface filtering, HTTP client factories, and creating custom features for Spring Cloud applications.
This article walks through the complete lifecycle of a request handled by Envoy, covering terminology, network topology, configuration details, listener and filter chain processing, TLS transport sockets, HTTP/2 encoding/decoding, routing, load balancing, and post‑request cleanup, illustrated with diagrams and sample YAML configuration.
This article provides a comprehensive overview of Dubbo's six built‑in load‑balancing strategies—Random, Round Robin, Least Connection, Consistent Hash, Weighted Random, and Weighted Round Robin—explaining their principles, suitable scenarios, and exact XML configuration examples for Java RPC services.
This article walks you through building a scalable system—from a single‑server prototype to a multi‑data‑center design that uses load balancers, database replication, caching, CDNs, stateless layers, message queues and automated monitoring—to handle traffic from hundreds of thousands to millions of users.
This article provides a comprehensive overview of distributed architecture, covering its definition, core benefits such as performance, availability, scalability, and fault tolerance, and detailing major categories like microservices, distributed databases, storage systems, computing, communication, load balancing, security, and transactions.
Load balancing, essential for distributed systems and microservices, boosts performance, ensures high availability, provides scalability, improves user experience, and adds security layers, making it a critical technique for modern architecture.
This article explains how to evolve a single‑server application into a highly available, horizontally scalable system that can serve over a million users by introducing load balancers, database replication, caching layers, CDNs, stateless network design, multi‑data‑center deployment, and message queues.
This article walks through the step‑by‑step process of turning a single‑server prototype into a highly available, horizontally‑scaled system that can serve over a million users, covering server configuration, database selection, load balancing, caching, CDN, stateless networking, multi‑data‑center deployment, message queues, monitoring, and sharding strategies.
This guide walks you through expanding a single‑server application into a highly available, horizontally‑scaled architecture that can serve over a million users by adding load balancers, database replication, caching layers, CDNs, stateless network design, multi‑data‑center support, message queues, monitoring and automation.
This article analyzes the CPU‑heavy routing and load‑balancing modules of Dubbo in a large‑scale microservice cluster, identifies O(n) traversal as the root cause, and presents a step‑by‑step redesign—including disabling unused routers, caching route results with epoch validation, BitMap‑based intersection, and grouped routing—that reduces CPU usage by up to 27% and doubles TPS when provider instances exceed 2,000.
This article analyzes Elasticsearch shard imbalance incidents, explains the built‑in shard balancing algorithm and its configuration parameters, demonstrates weight calculations with source code, and proposes practical improvements—including shard count adjustments and a custom load‑aware balancing tool—to achieve more effective cluster load distribution.
Apache Pulsar, a cloud‑native distributed messaging platform, solves Didi Big Data’s DKafka bottlenecks by separating compute and storage, using sequential log writes, heterogeneous disks, multi‑level caching, bundle‑based load balancing and automatic scaling, dramatically improving stability while introducing richer monitoring complexity.
This comprehensive guide introduces Nginx as a high‑performance web and reverse‑proxy server, explains its core features such as virtual hosting, load‑balancing strategies, and detailed security hardening techniques, and provides practical configuration examples for production environments.
This article explores the end‑to‑end design of a modern dating platform, covering requirement analysis, micro‑service architecture, gateway routing, sharded MySQL, CDN caching, matchmaking, recommendation scoring, high‑concurrency strategies, load balancing, database optimization, message queues, and spatial proximity algorithms such as grid, quadtree, and GeoHash.
This article details the design, evolution, and best‑practice implementation of load‑balancing for ASR (speech‑recognition) services in Ctrip's massive call‑center, covering component architecture, MRCP integration, challenges with traditional balancers, and two practical solutions using FreeSWITCH distributor and OpenSIPS.
This article provides a detailed introduction to Nginx, covering its features, installation on Linux, core configuration directives, reverse proxy and load balancing setups, caching strategies, HTTPS support, CORS handling, gzip compression, and the server's architecture and process model.
This extensive tutorial explains Nginx's architecture, installation, directory layout, configuration directives, location matching rules, reverse proxy setup, load balancing strategies, static‑dynamic separation, CORS handling, caching mechanisms, access control lists, rate limiting, HTTPS configuration, compression, and many other essential directives for effective web server and reverse‑proxy management.
This article walks through implementing three load‑balancing algorithms (random, round‑robin, weighted round‑robin) in Go, explains the weighted selection math with step‑by‑step examples, and presents two service‑liveness solutions—heartbeat via Docker/Kafka and HTTP health checks—complete with code snippets and deployment commands.
Learn how to make multiple Docker containers share a single external port by using reverse‑proxy load balancing with Nginx, configuring DNAT iptables rules, and leveraging the SO_REUSEPORT socket option, complete with step‑by‑step commands and network setup examples.
This guide walks through setting up a Percona XtraDB Cluster (PXC) version 5.7.43 on three Docker‑installed machines, configuring hostnames, loading images, creating a Swarm overlay network, deploying the cluster, adjusting MySQL settings, handling common failures, and adding load balancing with Nginx or HAProxy.
This article outlines five comprehensive techniques—including database indexing, caching, code refactoring, load balancing, and horizontal scaling—to dramatically improve API response times and reliability, illustrated with practical Java code examples and a real‑world case study.
This article details the August 2023 Bilibili CDN failure, analyzes its root causes, describes the 1‑5‑10 emergency recovery framework, and presents cloud‑side SLB/BFS optimizations and edge‑side scheduling and fallback strategies that together restored service and improved future resilience.
This article explains why load balancing is crucial for RocketMQ producers, details the internal selection algorithm using ThreadLocal indexes and round‑robin logic, and provides Java code examples illustrating how messages are distributed across queues.
This article provides a comprehensive overview of Nginx, covering its high‑performance characteristics, primary use cases such as static file serving and reverse proxy, essential command‑line utilities, and detailed explanations of the main, events, and http configuration blocks with practical examples and syntax rules.
This article explains when adding consumers to a RocketMQ topic improves message consumption, the reasons for consumer pull delays, and details six MessageQueue allocation strategies—including average, round‑robin, custom, machine‑room, nearby, and consistent‑hash—accompanied by code examples.
This article details how Vivo identified heavy CPU usage in Dubbo's routing and load‑balancing modules, applied asynchronous processing, cache‑based routing, disabled unused routers, and introduced grouping strategies, resulting in over 100% TPS gains and significant CPU reductions for large service clusters.
The article by delphisfang offers a concise, step‑by‑step guide to mastering Istio’s locality‑aware routing, explaining the three‑evidence learning method, the priority algorithm, required DestinationRule and outlier detection settings, how Envoy discovers locality, and tips for simplifying the Pilot‑Envoy mesh architecture.
This article explains how Nginx's ip_hash directive implements session affinity by routing all requests from the same client IP to a single backend server, provides configuration examples, discusses practical pitfalls, and shares real‑world test results.
Vivo tackled high CPU overhead in large‑scale Dubbo deployments by disabling unused routers, caching routing results with BitMap intersections and epoch validation, optimizing weight calculations, and adding a grouping router, which together delivered over 100 % TPS gains for 20 k+ providers and cut CPU usage by roughly 27 %.
This guide explains how to design and expand server infrastructure to handle millions of concurrent users by using load balancers, database sharding, caching, CDNs, hardware selection criteria, and redundancy techniques, ensuring high availability and performance 24/7.
This article compares Kubernetes Ingress and OpenShift Route, outlining their similar functions for exposing services, detailing their architectures, configuration steps, and highlighting essential differences such as ecosystem integration, syntax, and security features, while providing practical examples and code snippets for implementation.
Using only Tomcat for web services leads to DNS limits, scaling costs, lack of health checks, and no static file handling, so the article explains why Nginx is essential for load balancing, failover, and virtual‑host configuration, and provides practical Nginx examples.
This article walks through essential techniques for building high‑concurrency systems, covering page static‑generation, CDN acceleration, caching layers, asynchronous processing with thread pools and MQ, sharding, connection pooling, read/write splitting, indexing, batch queries, clustering, load‑balancing, rate limiting, service degradation, failover, multi‑active deployment, stress testing, and monitoring.
This article explains the concept of load balancing, describes how Kubernetes Ingress controllers implement it, and provides step‑by‑step YAML examples for deploying Nginx Ingress, configuring basic routing, sticky sessions, custom load‑balancing algorithms, and external traffic policies to achieve flexible traffic distribution in a cloud‑native environment.
This article examines the governance of WeChat's NLP algorithm microservices, outlining the management, performance, and scheduling challenges they face and presenting solutions such as automated CI/CD pipelines, dynamic scaling, DAG‑based service composition, a custom tracing system, the PyInter interpreter, and an improved load‑balancing algorithm.
This article explains how Nginx's ip_hash directive implements session affinity by routing all requests from the same client IP to a single backend server, demonstrates configuration examples, analyzes behavior when servers go down, and discusses the method's limitations such as load imbalance and dynamic IP issues.
This article breaks down Instagram’s rapid growth from zero to 14 million users by examining its three guiding principles, AWS‑based infrastructure, Django‑Python backend, PostgreSQL sharding, Redis caching, load balancing, push notification pipeline, and monitoring tools.
The article explains how DNS load balancing enables a single domain name to resolve to multiple IP addresses, describes common DNS resolution strategies such as round‑robin, weighted, and response‑time, and outlines the advantages and limitations of using DNS for load distribution.
This extensive tutorial walks through the concepts, installation steps, configuration examples, and advanced features of Nginx—including reverse proxy load balancing, static‑dynamic separation, resource compression, buffering, caching, IP whitelist/blacklist, CORS handling, anti‑hotlinking, large file support, SSL setup, high‑availability with keepalived, and performance tuning—providing a complete reference for building a robust, high‑performance web infrastructure.
This article introduces Apache Pulsar, an open‑source cloud‑native distributed messaging platform, detailing its storage‑compute separation architecture, multi‑tenant support, load balancing, fault tolerance, schema handling, functions, IO connectors, tiered storage, cross‑region replication, and operational commands for managing brokers, bookies, and namespaces.
This article explores comprehensive strategies for designing high‑concurrency systems, covering page staticization, CDN acceleration, caching layers, asynchronous processing, thread‑pool and MQ integration, sharding, connection pooling, read/write splitting, indexing, batch processing, clustering, load balancing, rate limiting, service degradation, failover, multi‑active deployment, stress testing, and monitoring.
This article explains how to solve the WebSocket message delivery problem in microservice architectures by using a lightweight library that provides an @EnableWebSocketLoadBalanceConcept annotation, detailing its design, connection management, message routing, and customizable selectors for targeted delivery.
This article explains how a single domain can resolve to multiple IP addresses using DNS load‑balancing techniques, outlines common DNS resolution strategies, and discusses the advantages and limitations of DNS‑based load balancing.
This article introduces a Spring‑Boot library that solves WebSocket message loss in microservice architectures by enabling automatic inter‑instance load balancing, configurable annotations, connection management, custom selectors for targeted messaging, and includes code examples, design diagrams, and promotional information for related community resources.
This article provides a comprehensive overview of Nginx, covering its high‑performance features, typical use cases, essential commands, and detailed configuration directives—including main, events, http, server, and location blocks—plus practical examples of server_name, root, alias, and rewrite rules.
This article provides an in‑depth overview of Nginx, covering its core features, performance benefits, request processing flow, forward and reverse proxy concepts, startup commands, directory layout, detailed nginx.conf settings, location directive syntax, common SPA 404 handling, CORS setup, and gzip compression for building high‑performance web services.
This article introduces a Spring‑Boot library that uses a single annotation to enable WebSocket (and other long‑connection) load balancing across multiple microservice instances, explains its abstract connection model, shows how to configure and use it with code examples, and describes the underlying connection management, selector, and message routing mechanisms.
This article explains the three core benefits of message queues, compares major MQ products, details RocketMQ's advantages, internal models, reliability mechanisms, load‑balancing, storage design, and practical code examples, guiding engineers to make informed architectural decisions.
This article explains what an API gateway is, why it is needed in micro‑service architectures, outlines key design considerations such as routing, load‑balancing, resilience and security, and compares popular open‑source gateway solutions like OpenResty, Kong, Zuul and Spring Cloud Gateway.
This article explains enterprise‑level traffic planning and transparent multi‑level routing, detailing the network request flow, front‑end and back‑end component pairings, load‑balancer (LB) architectures, default and dedicated routing rules, and the mapping relationships between VIP and RIP for both internal and public domain name resolution.
This comprehensive guide walks you through the challenges of monolithic deployments, explains core Nginx concepts, shows step‑by‑step installation, configures reverse proxy, static‑dynamic separation, compression, buffering, caching, security features, SSL, high‑availability with keepalived, and essential performance tuning for production‑grade servers.
This article explains how cloud‑native distributed systems achieve higher availability through resilience strategies such as load balancing, timeouts with automatic retries, deadlines, and circuit breakers, describing their placement across OSI layers, implementation options via libraries or proxies, and practical algorithm choices.
This article explains the end‑to‑end network request flow in enterprise systems, clarifies terminology such as VIP and RIP, compares front‑end and back‑end network component combinations, and details various load‑balancing approaches including default and dedicated rules, with practical diagrams and deployment recommendations.
This comprehensive guide explains what API gateways are, why they are essential in micro‑service architectures, outlines core design concepts such as routing, load‑balancing, elasticity and security, compares popular implementations like Kong, Zuul and Spring Cloud Gateway, and offers practical design considerations for high‑performance, highly‑available, and scalable gateway solutions.
This comprehensive guide walks you through installing Nginx, configuring reverse proxy, setting up load balancing, enabling static‑dynamic separation, resource compression, buffering, caching, IP whitelist/blacklist, cross‑origin support, anti‑hotlinking, large file handling, SSL certificates, high‑availability with Keepalived, and performance tuning tips for production environments.
This article explains how Nginx can be used to achieve various load‑balancing strategies—including round‑robin, least‑connections, IP hash, generic hash, least‑time, and random—provides detailed configuration examples, shows how to integrate Nginx with SpringBoot services, and outlines testing and deployment steps.
This article provides a comprehensive analysis of OpenStack Octavia’s LBaaS implementation, covering its core components such as Amphora, VIP management, network topology, listener and pool creation, health monitoring, SSL communication, and the automated failover process that ensures high‑availability load balancing for cloud environments.
This article provides a comprehensive walkthrough of RocketMQ 4.9.x consumption architecture, covering the four core roles, publish‑subscribe model, storage structures, load‑balancing, long‑polling, concurrent and ordered consumption flows, progress persistence, and retry mechanisms, with illustrative diagrams and code snippets.
HAProxy is an open‑source L4/L7 load balancer offering reverse‑proxy, session persistence, diverse balancing algorithms, ACL‑based routing, health checks, and a web UI; the guide details its high‑performance architecture, high‑availability deployment with Keepalived, configuration examples, and extensive kernel and system tuning for massive traffic.
This article provides a comprehensive guide to Linux Virtual Server (LVS) load balancing, covering its architecture, core concepts, software modules, NAT/TUN/DR modes, scheduling algorithms, ipvsadm command usage, and step‑by‑step deployment of LVS‑NAT with Keepalived for both TCP and UDP scenarios.
After a massive message backlog in RocketMQ, the author discovered that identical clientIds generated by Docker containers using host network mode caused broker load‑balancing errors, leading to slow consumption; the article explains the root cause, code analysis, and how setting a unique clientId resolves the issue.
This guide explains how a single domain can be configured with multiple A records to point to different IP addresses, describes common DNS resolution strategies such as round‑robin and weighted routing, and outlines the advantages and limitations of DNS‑based load balancing.
This article explains how Feign relies on Ribbon for remote calls, details Ribbon's load‑balancing mechanisms, various balancing rules, and demonstrates how enabling Ribbon's eager‑load mode can pre‑warm clients to avoid the latency of the first request.
This article explains the AKF Cube methodology for scaling distributed systems, detailing how horizontal replication (X axis), functional decomposition (Y axis), and user‑based sharding (Z axis) can be combined to boost performance while balancing implementation costs.
This article provides a comprehensive guide to essential Nginx configurations—including reverse proxy, static file serving, HTTPS, load balancing, caching, URL rewriting, response headers, gzip compression, SSL redirection, scheduled tasks, security, logging, and basic authentication—to improve the efficiency and stability of interface automation testing.
This article explains what an API gateway is, outlines its required high‑performance, high‑availability, and extensibility characteristics, details core functions such as routing, load balancing, authentication, rate limiting, and compares popular solutions like Spring Cloud Gateway, Zuul, OpenResty, and Kong.
This article explains the consistent hashing algorithm, its hash‑ring model, how it overcomes the limitations of simple modulo hashing in distributed caches, the role of virtual nodes for load balancing, and common use cases such as memcached, Redis clusters, and load‑balancing routers.
