This article explains a proven high‑concurrency solution that combines Linux Virtual Server (LVS), Nginx, and Keepalived to achieve million‑level request handling, load balancing, and high availability for large‑scale web services.
The article explains what a Virtual Private Cloud (VPC) is, how it creates an isolated, customizable network on a cloud provider, outlines its core components such as subnets, gateways, and peering, and details security designs, traffic flows, and advanced scenarios like high‑availability and hybrid cloud integration.
This article explains the essential role of load balancing in modern distributed systems and walks through single‑layer, double‑layer, and billion‑scale architectures, highlighting their design principles, benefits, trade‑offs, and typical deployment scenarios for high‑availability and high‑performance applications.
This article explains how Nginx's master‑slave (primary‑backup) setup, combined with Keepalived and a virtual IP, provides high‑availability for web and API services by automatically detecting failures, shifting the VIP, and allowing the backup server to take over without service interruption.
An in‑depth comparison of three popular MySQL high‑availability architectures—MHA, Percona XtraDB Cluster (PXC), and Galera Cluster—covers their principles, architectures, strengths, limitations, deployment scenarios, and best‑practice recommendations to help you select the optimal solution for your production environment.
This guide walks you through SFTP server planning, user naming conventions, directory structures, SSH configuration, account creation, permission setup, client usage, log auditing, rotation, connection limits, monitoring, and high‑availability deployment across multiple servers, providing ready‑to‑run commands and scripts.
This article explains MaShang Cloud's RDS high‑availability design, detailing the distributed sentinel monitoring system, proxy layer, multi‑AZ disaster‑recovery strategies, and real‑world case studies that demonstrate how MySQL and Redis services maintain continuous, consistent access with minimal RTO and RPO.
Learn how to prevent multiple replica pods from landing on the same node by using Kubernetes Pod Anti-Affinity, understand hard and soft scheduling rules, apply a ready‑to‑use YAML example, and verify that each replica runs on a separate host for high availability.
This guide walks you through deploying a highly available MinIO distributed object storage cluster on Rocky 9, covering prerequisites, environment preparation, user and directory setup, configuration files, systemd service creation, testing, Nginx load balancing, and verification of cluster health.
This article explains the differences between SLA, SLO, and SLI, shows how to express user expectations as concrete service level agreements, and introduces essential high‑availability metrics such as availability percentages, MTBF, MTTR, RPO, RTO, WRT, and MTD for reliable system design.
This article explains how to build a high‑availability, million‑level concurrent architecture by combining Linux Virtual Server (LVS) for layer‑4 load balancing, Nginx for layer‑7 reverse proxy and caching, and Keepalived for VIP failover, including configuration examples and deployment modes.
This paper presents the design, implementation, and experimental evaluation of OceanBase's unitization architecture for large‑scale online map services, demonstrating superior disaster‑recovery, high‑throughput OLTP/OLAP performance, and storage efficiency compared with competing distributed databases.
This article explains the role of consensus algorithms in achieving high‑availability through redundancy and automatic failover, clarifies distributed consistency, explores the CAP theorem and its C component, and introduces the BASE theory as a practical complement for eventual consistency in modern distributed systems.
This guide explains why three servers are needed for high availability, walks through hardware and software preparation, network configuration, MySQL master‑slave replication setup, HAProxy load‑balancing, and firewall/SELinux adjustments, providing complete command‑line examples for each step.
The USENIX‑selected paper on Tencent’s TGW cloud gateway reveals how a modular, multi‑layer architecture achieves up to 2.9‑fold throughput gains, seconds‑level elastic scaling, loss‑less hot migration, and sub‑second fault recovery, offering a blueprint for resilient large‑scale cloud networking.
This article explores how to build fault‑tolerant distributed systems by formalizing consensus, outlines its core properties, explains the FLP impossibility theorem, and shows how algorithms like Raft sidestep its limits through timing constraints and recovery mechanisms.
The article details how DaVinci Resolve’s project library, built on PostgreSQL, evolved from a monolithic server to a Docker‑based setup and finally to a Pigsty‑powered high‑availability cluster, covering challenges, point‑in‑time recovery, permission management, a real‑world outage, and the resulting reliability gains.
This comprehensive guide explains Redis's core architecture, the underlying implementation of its various data types, persistence mechanisms (RDB and AOF), high‑availability solutions such as replication, Sentinel and Cluster, as well as performance‑monitoring techniques and common optimization strategies.
This article objectively compares middleware‑based sharding with NewSQL distributed databases, examining their architectural differences, transaction models, high‑availability mechanisms, scaling, SQL support, storage engines, and maturity to help practitioners decide which approach best fits their workload and operational constraints.
This article explains how RocketMQ achieves high availability and data reliability through its master‑slave broker design, covering synchronous and asynchronous replication, flush strategies, transaction messaging, automatic failover with Dledger, and read‑write separation for load balancing in distributed systems.
This article explains why fault testing is essential for modern distributed and cloud environments, outlines core goals, design principles, common fault categories, practical implementation strategies such as chaos engineering and gray releases, and shows how to analyze results to continuously improve system reliability.
This guide explains why Redis clustering is needed for capacity, concurrency and failover, describes Redis 3.0's decentralized cluster architecture, provides step‑by‑step commands to configure, launch and combine six nodes into a cluster, demonstrates slot calculations, client usage with Jedis, and outlines fault recovery, pros and cons, and cleanup procedures.
The article walks through the need for a service registry in a micro‑service scenario, explains how services register and discover each other, discusses high‑availability deployment, and compares push, pull, and long‑polling mechanisms for dynamic detection of service instances.
Understanding high‑availability architectures involves mastering replication and fail‑over, balancing RTO and RPO, and choosing among four patterns—Active‑Standby, Active‑Active, Cold Standby, and Hot Standby—each with distinct synchronization, load‑balancing, and cost considerations for reliable system design.
This article details ZEEK's cloud‑native transformation, covering the strategic shift to open‑source standards, unified microservice architecture, high‑availability practices, upgraded traffic gateways, visual data analysis, car‑network data collection, and AI‑assisted development, illustrating how these steps enhanced system stability, scalability, and development efficiency.
This article compiles the most frequently asked Redis interview questions, covering fundamentals, data structures, persistence mechanisms, high‑availability features, clustering, performance tuning, and troubleshooting, providing clear explanations and practical guidance to help candidates confidently tackle any Redis interview.
Gaode Map’s new integrated container architecture, combined with on‑demand loading, package slimming, and multi‑system/device/language support, delivers ultra‑stable, high‑availability navigation with second‑level startup, halved binary size and traffic, enabling efficient, cross‑platform mobile mapping for diverse hardware.
This article objectively compares NewSQL distributed databases with traditional middleware‑based sharding solutions, examining their architectures, distributed transaction handling, high‑availability, scaling, storage engines, and ecosystem maturity, and provides guidance on selecting the appropriate approach based on consistency, growth, operational capacity, and performance requirements.
The article explains how fault testing—by deliberately injecting failures in a controlled environment—helps identify system weaknesses, validates post‑mortem improvements, and drives architectural optimization, thereby increasing high‑availability and resilience of modern internet services.
The article objectively compares NewSQL distributed databases with middleware‑plus‑sharding solutions, covering architectural differences, distributed transaction handling, high‑availability, scaling, SQL support, storage engines, maturity, and provides a decision‑making checklist to help engineers select the most suitable approach for their workloads.
This guide walks through installing etcd, generating TLS certificates with cfssl, configuring static, dynamic, or DNS‑based discovery, setting up systemd service files for three nodes, and verifying cluster health using etcdctl, providing a complete step‑by‑step deployment for a production‑grade, cloud‑native key‑value store.
This article objectively compares NewSQL databases with middleware‑based sharding, dissecting their core architectures, distributed transaction handling, high‑availability designs, scaling mechanisms, SQL support, storage engines, and maturity to help engineers decide the most suitable solution for their workloads.
The article describes the evolution from modular push modules to a framework‑based and finally a service‑oriented unified push platform, detailing its architecture, functional and non‑functional requirements, component responsibilities, and deployment considerations for high‑performance, scalable enterprise notification systems.
This article objectively compares NewSQL distributed databases with traditional middleware‑based sharding solutions, examining their architectures, distributed transaction support, high availability, scaling, SQL capabilities, and maturity to help readers decide which approach best fits their workload and operational constraints.
Learn step-by-step how to install and configure DRBD for real-time block device replication, set up keepalived for virtual IP failover, and manage primary/secondary roles, including troubleshooting split-brain, to achieve seamless file synchronization and high availability between two Linux servers.
This article introduces Alibaba's LangEngine, a pure Java AI application framework, detailing its high‑availability gateway architecture, communication protocols, streaming and non‑streaming output, multi‑level metadata caching, asynchronous and serverless designs, and future open‑source roadmap, offering practical guidance for building robust AI services.
Redis Sentinel provides a robust high‑availability solution by monitoring master‑slave clusters, automatically detecting failures, electing leaders, and performing failover, while using quorum voting, Pub/Sub communication, and configuration provisioning to ensure seamless master promotion and client redirection without manual intervention.
This article explains the fundamentals of MySQL master‑slave replication, detailing how binlog‑based data syncing works and providing a complete Docker‑based deployment guide—including configuration files, user creation, replication commands, and troubleshooting tips for a one‑master‑two‑slave cluster.
This article explains Redis Sentinel’s role as the official high‑availability solution, detailing its monitoring, notification, automatic failover mechanisms, discovery processes, connection types, down‑state classifications, failover steps, leader election, master selection rules, and data consistency guarantees.
This article analyzes the latency and availability problems of native Redis cluster slot migration, proposes a master‑slave synchronization based redesign that batches slot transfers, reduces ask‑move and topology‑change overhead, and validates the solution with performance tests showing smoother latency and higher reliability.
This article presents a comprehensive guide to building high‑availability systems, covering availability metrics, fault prevention, detection and recovery, capacity evaluation, layered architecture design, service tiering, resilience mechanisms, and operational best practices for reliable service delivery.
This article shares a backend engineer's practical methodology for building systems that simultaneously achieve high performance, high concurrency, and high availability, covering performance optimization, scaling strategies, fault‑tolerance techniques, and real‑world case studies from B‑ and C‑side logistics platforms.
This tutorial explains how to design and deploy a high‑availability web cluster using Linux Virtual Server (LVS) and Keepalived, covering terminology, test environment setup, detailed configuration steps, HA testing procedures, and a concise summary of the solution.
A cross‑border e‑commerce company replaced its massive MySQL instance with OceanBase, detailing the business drivers, selection criteria, two‑phase migration process, performance gains, cost savings, remaining incompatibilities, and practical operational lessons learned.
This article explores the challenges and opportunities of distributed architectures and explains how various static and dynamic load‑balancing strategies, hardware and software balancers, redundancy, health checks, and failover mechanisms together ensure high availability, illustrated with real‑world e‑commerce and live‑streaming case studies and future trends.
This article examines the core challenges of distributed data systems—including consistency, availability, and partition tolerance—then details master‑slave replication mechanisms for MySQL and Redis, various replication modes and binlog formats, and explores data partitioning, sharding, and hot‑key mitigation techniques for scalable, high‑availability deployments.
The article explains why multi‑active (active‑active) architecture is essential for modern enterprises, outlines its evolution from single‑server setups, details core principles like redundancy and data synchronization, compares common deployment patterns, examines industry use cases, and discusses challenges and mitigation strategies.
This comprehensive guide explains how to design, build, and operate high‑availability systems by covering availability metrics, fault‑tolerance strategies, capacity planning, code and data layer architecture, automated testing, monitoring, and clear role responsibilities to ensure services stay reliable and resilient under load.
This article examines the challenges of building multi‑active distributed systems, focusing on the data layer’s role in high availability, write‑latency, sharding, isolation, replication strategies, and routing decisions, and provides concrete architectural patterns and practical guidelines for robust backend design.
The article explains why 24/7 high‑availability systems are essential for modern enterprises and details core design principles, layered architecture, and critical technologies such as redundancy, load balancing, caching, elastic scaling, monitoring, and fault‑tolerance to ensure continuous, reliable service.
This article analyses the OpenAI large‑scale Kubernetes outage, explains the inherent risks of massive K8s clusters, and presents Alibaba Cloud's architectural enhancements, observability improvements, and best‑practice guidelines to achieve high‑availability and reliable operation of thousands‑node Kubernetes environments.
This article examines the modern challenges of IT architecture and presents proven techniques—microservices, container orchestration, distributed caching, redundancy, load balancing, and automated fault recovery—illustrated with Amazon and Google case studies, while forecasting future AI and cloud‑native trends.
This article details the design, high‑availability mechanisms, traffic isolation, performance optimizations, caching, database migration, and refined flow‑control and degradation strategies employed to keep a billion‑user membership system reliable and performant under extreme load.
This article explains how system stability depends on architecture and code details, defines SLA and the “nines” metric, outlines Google’s SRE hierarchy, and provides practical governance steps—including development and release processes, high‑availability design, capacity planning, monitoring, incident response, and team culture—to achieve reliable, high‑availability services.
Bilibili’s infrastructure team created a lightweight, multi‑layered disaster‑recovery drill platform—combining an atomic fault library, scenario catalogs, chaos‑experiment orchestration, real‑time observation, and a product‑level interface—backed by standardized governance and CI‑integrated automation, cutting drill preparation from weeks to days and boosting weekly resilience testing across the organization.
The article explains how to design resilient applications by identifying critical paths, adding redundant components, using formulas for overall availability, and applying best‑practice recommendations such as multi‑zone/region deployment, load‑balanced VMs, database replication, and thorough testing of failover mechanisms.
This article explains how to design and implement cross-cloud database disaster recovery, covering background goals, common challenges, step-by-step migration stages, the role of Volcano Engine’s Database Transmission Service, cold-hot separation, HTAP analysis, and practical business value with real-world examples.
This article details the architecture, challenges, and optimization techniques of an app operation platform, covering its dual-engine design, caching strategies, and high‑availability principles that reduce response time to under 4 ms while supporting massive concurrent traffic.
This article details Tencent Cloud engineers' technical solutions for large‑scale Apache Pulsar deployments, covering multi‑network access challenges, a routing‑addressing redesign, product deployment models, a four‑step cluster migration process with subscription‑progress compensation, and high‑availability best practices such as rack‑aware and cross‑AZ replica distribution.
This article analyzes the architectural challenges of building large‑scale distributed systems with multi‑active (cross‑city) capabilities, focusing on data‑layer design, write latency, replication models, sharding techniques, and routing impacts to guide reliable, high‑performance infrastructure decisions.
This guide explains how to deploy the Dify LLMOps platform on Alibaba Cloud Container Service for Kubernetes (ACK), configuring cloud databases, enabling high‑availability replicas, setting up elastic scaling, and exposing the service via Ingress to create a production‑grade, scalable AI application environment.
The article explores the evolution of database high‑availability architectures, compares mainstream solutions like Oracle's HA, RAC and ADG, examines domestic offerings such as GBase 8s with HAC, RHAC and SSC clusters, and provides practical guidance for selecting cost‑effective HA designs to ensure continuous business operations.
This article analyzes how write latency, write volume, isolation, and data replication strategies influence the design of multi‑active distributed systems, offering practical guidance on sharding, synchronous and asynchronous replication, routing, and architecture selection for high availability and performance across regions.
This article explains Redis split‑brain behavior, describing its definition, causes such as network failures and Sentinel elections, the resulting data loss during master‑slave switches, and practical prevention measures including quorum configuration, timeout tuning, network monitoring, proxy layers, and the min‑slaves‑to‑write and min‑slaves‑max‑lag settings.
This article presents a comprehensive overview of high‑availability design patterns and best‑practice recommendations for Alibaba Cloud Container Service for Kubernetes (ACK), covering common error scenarios, single‑cluster and multi‑cluster architectures, workload resilience, monitoring, and real‑world case studies.
This article explains Redis master‑slave replication, synchronization steps, handling of network partitions, and how Sentinel provides automatic failover through monitoring, leader election, and notification, offering strategies to reduce master load and ensure high availability.
This guide demonstrates how to set up a two‑node Keepalived configuration in dual‑host mode, creating two VRRP instances that act as master and backup to enable seamless VIP address migration between the servers.
This guide walks through planning a four‑layer reverse‑proxy cluster, installing Nginx, configuring load‑balancing streams, setting up keepalived high‑availability with master/backup modes, testing failover, and troubleshooting common keepalived issues on Linux servers.
The paper presents a scalable, message‑queue‑driven reward system for Bilibili Live that unifies diverse reward types and distribution scenarios through standardized APIs, layered fast/slow queues, idempotent processing, multi‑stage retries, and comprehensive monitoring to ensure low latency, no over‑issuance, and reliable delivery.
Achieving five‑nine (99.999%) uptime demands massive capital, operational, and human investments, and this article breaks down the infrastructure, monitoring, testing, staffing expenses and explains why the marginal benefits sharply diminish as availability targets rise.
This step‑by‑step guide explains how to use Helm to install a highly available ingress‑nginx controller on Kubernetes, covering version compatibility, replica configuration, pod anti‑affinity, load‑balancer setup with HAProxy, and verification of the deployment.
This article shares a backend‑centric methodology and practical experiences for constructing systems that simultaneously achieve high performance, high concurrency, and high availability, covering performance optimization, read/write strategies, scaling techniques, fault‑tolerance mechanisms, and deployment considerations.
This article shares a backend engineer’s comprehensive methodology and practical experiences for building systems that simultaneously achieve high performance, high concurrency, and high availability, covering performance optimization, caching strategies, scaling techniques, fault tolerance, and operational best practices across application, storage, and deployment layers.
This article details ByteDance’s disaster‑recovery evolution—from a single‑room deployment to same‑city multi‑data‑center setups and finally to active‑active multi‑region architectures—explaining the challenges, specific failure scenarios, and the strategic practices used to ensure continuous service during outages.
This article objectively compares NewSQL databases with middleware‑based sharding solutions, examining architecture, distributed transactions, CAP constraints, high availability, scaling, SQL support, storage engines, and maturity to help readers choose the right approach for their workloads.
Learn step‑by‑step how to set up a production‑grade, highly available Harbor container registry on a Kubernetes cluster using Helm, covering prerequisites, architecture, chart installation, TLS certificate creation, secret management, PostgreSQL setup, and verification procedures.
This guide details a step‑by‑step migration plan for HBase and HDFS clusters, covering background, high‑availability architecture, role assignments, expansion and shrinkage of ZooKeeper and JournalNode, NameNode and DataNode migration, rolling restarts, and common upgrade pitfalls.
This guide explains how to create a high‑availability web load‑balancing cluster using Linux Virtual Server (LVS) and Keepalived on CentOS, covering background, terminology, environment setup, detailed configuration steps for master and backup nodes, real‑server preparation, HA testing, and final conclusions.
Amid the digital transformation era, Kubernetes has become essential for modern cloud computing, and this article demystifies its inner workings by detailing its master and node components, service discovery, storage orchestration, networking, high availability, flexible resource management, and thriving ecosystem.
This guide walks through the complete process of creating a MySQL dual‑master replication cluster, configuring replication users, synchronizing binary logs, setting up keepalived for virtual IP failover, and testing both data consistency and high‑availability monitoring.
This guide outlines a comprehensive, step‑by‑step strategy for creating a highly available, secure, and scalable website—from buying and protecting multiple domains, configuring DNS and CDN, setting up image and database servers, to implementing monitoring, redundancy, high‑concurrency testing, and disaster‑recovery plans.
Redis is a high‑performance, in‑memory NoSQL key‑value store offering persistence, rich data types, advanced structures, and robust commands, supporting caching, session storage, pub/sub, and leaderboards, while evolving through replication, Sentinel, clustering, and multithreaded proxies, with Tencent Cloud providing scalable, highly available managed Redis services.
Buffalo, JD.com’s in‑house distributed DAG scheduler, tackles massive task volumes and complex dependencies through a dual‑layer entity model, instance‑based execution, tiered scheduling, high‑availability architecture, event‑driven processing, in‑memory and cold‑hot data separation, delivering scalable, low‑latency ETL orchestration.
This article examines JD's self‑developed Buffalo distributed workflow scheduling system for big‑data ETL, detailing its two‑layer entity model, instance‑based scheduling, high‑availability three‑layer architecture, performance optimizations, cold‑hot data separation, and open APIs to support massive, complex data pipelines.
The article introduces JD's Buffalo distributed workflow scheduling system, detailing its dual-layer entity model, instance-based scheduling, high‑availability three‑tier architecture, performance optimizations such as horizontal scaling and event‑driven execution, as well as cold‑hot data separation and open APIs for future enhancements.
This comprehensive guide outlines the seven key pillars—operations, high‑availability architecture, capacity governance, change management, risk governance, fault management, and chaos engineering—that together form a systematic approach to building and maintaining a reliable, 24‑hour backend system.
LApiGateway, Huolala's internal micro‑service gateway, achieves five‑nine availability through a dual‑plane architecture, comprehensive monitoring, SLA definition, risk classification, heartbeat health checks, traffic migration strategies, strict change governance, and regular fault drills, all detailed in this technical overview.
This article explains ten core techniques—system splitting, decoupling, asynchrony, retry, compensation, backup, multi‑active strategies, isolation, rate limiting, circuit breaking, and degradation—that together enable robust, high‑availability architectures for modern backend services.
This article examines the challenges faced by Ctrip’s ticket reservation transaction system during flash‑sale events and details the architectural optimizations—including Redis caching, database load reduction, supplier integration, and multi‑layer traffic throttling—that ensure system stability, strong consistency, and high availability under extreme concurrency.
This article presents a detailed experimental study of OceanBase's Arbitration Service in a 2F1A (two full‑function replicas plus one arbitration node) configuration, examining how the system behaves when one or both full‑function replicas fail, how log‑stream degradation and permanent offline mechanisms work, and how normal service is restored after node recovery.
This article explains how to achieve high‑availability in microservice systems through traffic governance techniques such as circuit breakers, various isolation strategies, retry mechanisms, timeout controls, and rate‑limiting, illustrating each concept with examples, formulas, and pseudo‑code.
This article explains how traffic governance—including circuit breaking, isolation, retry mechanisms, degradation, timeout control, and rate limiting—helps microservice systems achieve the three‑high goals of high performance, high availability, and easy scalability, using concrete formulas, algorithms, and practical examples.
This article walks through real‑world Oracle RAC failures caused by misconfigured VIP failover and SCAN IP load‑balancing, explains how to diagnose the symptoms, provides correct TAF and listener settings, and highlights essential configuration tips to ensure reliable high‑availability operation.
The 2024 CCTV Spring Festival Gala live stream employed comprehensive stability assurance practices across signal encoding, CDN distribution, request handling, and playback—using multi‑source encoding, multi‑level origin redundancy, multi‑cluster HA, and P2P‑augmented delivery—to handle massive QPS spikes, ensure high availability, and provide a resilient, high‑quality viewing experience.
This article explores how service availability is quantified, explains the impact of MTBF and MTTR on reliability, and presents concrete operational practices—including redundancy, traffic control, and change‑management techniques—to move systems from basic uptime to true high‑availability levels.
This article provides a detailed tutorial on Nginx, covering its core features, configuration file structure, and practical examples for reverse proxy, load balancing, static‑dynamic separation, and high‑availability clustering with code snippets and deployment steps.
The article reveals common pitfalls engineers face when presenting technical solutions—over‑focusing on details, ignoring business value and operational concerns—and shows how applying the MECE principle across value, technology, project, and operation dimensions creates a complete, persuasive report.
This article explains how traffic governance—including circuit breaking, isolation, retry, downgrade, timeout, and rate‑limiting—keeps microservice architectures highly available, performant, and easy to scale by balancing load, preventing cascading failures, and optimizing resource usage.
Tencent Cloud TDMQ for Apache Pulsar achieves multi‑AZ high availability by containerizing ZooKeeper, BookKeeper and Brokers, using managed ZK, persistent cloud disks and elastic NICs, enforcing quorum and rack‑aware replicas, and planning cross‑region bidirectional replication to ensure seamless disaster recovery and continuous messaging.
This article walks through every stage of a RocketMQ message—from producer creation, routing, queue selection, and storage with zero‑copy techniques, through high‑availability replication, consumption modes, ordering guarantees, and finally automatic cleanup—providing code examples and architectural diagrams for each step.
