This article outlines nine key DevOps metrics and KPIs—including the four DORA indicators and five additional measures—explaining how they help teams monitor performance, improve delivery speed, ensure quality, and maintain reliable, high‑availability applications.
After moving an application to a PaaS platform, intermittent 502 errors occur, seemingly only for POST requests, but the root cause lies in Nginx‑Ingress and uwsgi HTTP version mismatches, connection reuse, and retry behavior, which can be diagnosed through traffic analysis and configuration changes.
This article breaks down Kubernetes troubleshooting into three essential steps—understanding the failure, managing the response, and preventing recurrence—while mapping key monitoring, observability, and incident‑response tools to each phase for reliable cloud‑native operations.
This article systematically explains the relationships among high concurrency, high availability, performance, and scalability, defines their quantitative metrics, categorizes sources of change that affect system reliability, and outlines strategies for fault prediction, impact reduction, and rapid recovery in large‑scale services.
This article examines how three leading Chinese insurance companies used the nationally‑backed DevOps Capability Maturity Model to evaluate and improve their IT operations, detailing project architectures, cloud‑native implementations, continuous‑delivery results, and the broader significance of the DevOps standard.
This guide walks through deploying static files with Nginx, configuring location blocks and regex patterns, setting up reverse proxy to Java services, implementing various load‑balancing strategies (round‑robin, weight, ip_hash, fair, url_hash), separating static and dynamic content, and using essential directives such as return, rewrite, error_page, logging, deny, and built‑in variables.
This article reviews how leading Chinese telecom operators adopted the CAICT‑led DevOps Capability Maturity Model, detailing 17 evaluated projects across companies, the improvements achieved in continuous delivery, technical operations, and tooling, and the broader impact on IT efficiency and digital transformation.
The article introduces a new R&D efficiency metric—throughput standard deviation—explains its statistical basis, shows how it was derived from annual reports, illustrates its application across multiple teams, and discusses practical insights and limitations for software development operations.
This article reviews how major Chinese joint‑stock banks have adopted the CAICT‑led DevOps Capability Maturity Model, detailing assessment numbers, case studies of each bank's DevOps implementation, and the model’s standards and industry impact.
Amid a nationwide digital transformation push, Chinese banks such as Ningbo, Zhengzhou, Baixin, and others have leveraged the China Information and Communication Research Institute's DevOps Capability Maturity Model to assess and improve their IT efficiency, team integration, and continuous delivery practices, providing valuable industry insights.
This article explains the most important DevOps metrics—such as deployment frequency, lead time, automated test pass rate, change failure rate, MTTR, and others—and how tracking them helps teams improve software delivery speed, quality, and operational efficiency.
This article outlines how major Chinese banks have adopted the CAICT‑led DevOps Capability Maturity Model, presenting assessment counts across state‑owned, joint‑stock, and city commercial banks, summarizing the model’s standards, evaluation domains, and providing contact details for further inquiries.
This article reviews how major Chinese state‑owned banks applied the China Academy of Information and Communications Technology’s DevOps Capability Maturity Model, detailing assessment numbers, case studies of e‑life, AI advisory, mobile banking, and cloud‑native platforms, and highlighting the operational and security benefits achieved.
This article compiles 109 practical shell scripts covering a wide range of Linux automation tasks such as security, monitoring, backup, deployment, and system management, providing clear, copy‑ready code for hands‑on practice and interview preparation.
This article analyzes 502 Bad Gateway errors caused by SSL handshake failures in Nginx, presents the relevant error logs and curl output, and provides a detailed configuration example—including buffer sizes, client limits, and proxy settings—to fix the issue.
This collection compiles dozens of Chinese articles on performance testing, covering tools, frameworks, case studies, and techniques such as netdata monitoring, load generators, concurrency utilities, distributed testing, QPS modeling, and comparisons of JMeter, K6, Gatling, and FunTester.
This guide walks through the step‑by‑step process of restoring a Ceph 16 cluster when a node's system disk fails, covering host removal, node re‑initialization, Docker and Cephadm installation, host addition, labeling, OSD recreation, and final verification.
This article traces the evolution of DevOps from its roots in Toyota’s Production System and early manufacturing practices through the emergence of Kanban, Waterfall, Scrum, Agile, Lean, and modern extensions like ChatOps, GitOps, FinOps and AiOps, highlighting key milestones and concepts.
This guide introduces the most effective project management charts—including Gantt, burn‑down, WBS, HOQ, RACI, matrix, PERT, mind‑map, decision‑tree, and status tables—explaining their purpose, key components, and how to create them with common tools like Excel, Visio, and Xmind.
Facing rapid business growth and evolving mobile, AI, and automotive trends, the Home quality assurance team outlines its testing cloud platform’s three‑layer architecture, current capabilities such as performance, automation, and code scanning, the challenges it confronts, and its roadmap for expanding Paas and mobile testing.
This guide explains how to create a Spring Boot Admin server, configure a Spring Boot client to register with it, enable Actuator for extended metrics, and view real‑time logs, providing a comprehensive monitoring solution for Java backend services.
This article provides a step‑by‑step tutorial for installing, configuring, and running a JVM monitoring solution that integrates with Spring Boot, covering repository cloning, server configuration, Maven installation, application property setup, and accessing the monitor server UI.
The article details the background, challenges, multi‑year evolution, current architecture, and future roadmap of Hickwall, Ctrip's enterprise‑grade monitoring and observability platform, covering metrics, logs, traces, high‑cardinality handling, cloud‑native integration, alert governance, and storage engine migrations.
After a traffic surge exposed severe latency in a 15-year-old multi-service web platform, we used monitoring to discover a DB-connection leak caused by a liveness probe, corrected it, and distilled four practical lessons on latency metrics, tooling, legacy maintenance, and code vigilance.
This article explains why securities firms must adopt comprehensive, centralized monitoring, outlines regulatory and SLA drivers, identifies common monitoring shortcomings, and provides a step‑by‑step guide using open‑source solutions like Zabbix and Grafana to design, implement, evaluate, and continuously improve monitoring management.
Elon Musk presented new Starship performance data, outlined a goal of up to 50 launches this year and three daily launches in the future, described the spacecraft’s dimensions, propulsion, heat shield and orbital refueling technology, and reiterated his long‑term vision of making humanity a multiplanet species by colonising Mars.
This guide outlines a comprehensive, three‑stage IPv6 migration roadmap—including network upgrades, DNS/HTTPDNS redesign, security hardening, cloud and CDN adaptation, and mobile/app adjustments—to achieve full IPv6‑only support across infrastructure, services, and end‑users while ensuring seamless performance and security.
A production incident on an elastic‑cloud deployment revealed that setting the JVM Metaspace limit to 64 MiB, while the application required around 76 MiB, triggered continuous Full GC, causing stop‑the‑world pauses, full‑line time‑outs, and a costly rollback.
The article explains common release strategies—including blue‑green deployment, rolling updates, canary (gray) releases, and A/B testing—detailing their principles, advantages, limitations, and practical considerations for safely delivering new versions in production environments.
This article explains how Zabbix monitoring can be extended with custom shell or Python scripts to gather business-specific metrics, demonstrates a sample script that checks disk usage, and provides three methods to resolve a stale NFS file handle error, including using fuser, process inspection, and forced unmount.
This article shares CoolHome’s comprehensive SaaS project delivery framework, detailing each phase—from initiation and planning to execution, monitoring, and closure—while highlighting common pitfalls, improvement measures, and practical tips for managing large‑client engagements effectively.
In 2021, Xinwang Bank’s digital-native team tackled tight deadlines, tool migrations, personnel shifts, and intense debates to successfully achieve a Level‑3 DevOps continuous‑delivery assessment for its distributed consumer‑credit core system, demonstrating how coordinated effort and containerization can boost operational excellence.
This article shares hard‑won lessons from optimizing fifteen high‑load web applications, highlighting how a tiny DB‑connection leak in a pod probe caused severe slowdown and how fixing it, along with proper load testing, monitoring, and investment in tools and people, can dramatically improve system performance.
The article reviews ten significant 2021 internet outages—both domestic and international—analyzing their root causes, from server room power failures to configuration bugs, and highlights the operational lessons engineers can learn to improve system resilience.
This article walks through a real call‑center outage scenario, outlines step‑by‑step fault identification, emergency recovery actions, monitoring enhancements, concise emergency‑plan design, and introduces intelligent, automated event handling to help operations teams resolve incidents faster and more reliably.
This article explains why Redis needs high availability, defines failure scenarios, compares several HA architectures—including single‑instance, master‑slave with one or multiple Sentinel processes, and a three‑node solution with a virtual IP—and provides practical guidance for building a reliable Redis service.
This article compiles the 2021 Qunar Technical Salon infrastructure series, presenting original technical writings on databases, operational practices, and core components, each linked to detailed posts that share real‑world experiences, design guidelines, and performance insights for engineers and practitioners.
The article provides a comprehensive overview of payment‑system clearing and reconciliation, detailing fund inflow/outflow matching, reconciliation center functions, various one‑to‑one, many‑to‑many and one‑to‑many matching rules, data import, error handling, and auxiliary modules such as balance entry and abnormal data recovery.
This guide explains how to integrate ELK's Logstash with Zabbix using the logstash‑output‑zabbix plugin, covering installation, configuration of Logstash pipelines, Zabbix template and trigger setup, and testing the end‑to‑end alerting workflow.
This article analyzes the challenges of offline recruitment stores, explores why job seekers drop out or feel dissatisfied, presents user research from Chongqing, identifies critical service moments, and proposes concrete design strategies to improve the hiring experience and operational efficiency.
This article explains how to monitor, collect, and analyze real‑time logs, use multi‑dimensional metrics, perform local debugging, and enable cloud‑edge debugging for Spring Boot applications running on a Serverless platform, providing step‑by‑step commands and visual guides.
This comprehensive guide traces the evolution of open‑source monitoring solutions from the early 2000s to modern cloud‑native tools, comparing their strengths, weaknesses, and ideal deployment scenarios to help IT professionals select the most suitable monitoring product for their infrastructure.
This article analyzes the structure of black production in the real estate industry, focusing on its impact on companies like 贝壳 and the countermeasures implemented to combat it.
This article introduces essential Redis operational tools, covering the INFO command for monitoring, Prometheus‑based redis‑exporter visualization, the Redis‑shake data migration utility, Redis‑full‑check consistency verification, and the CacheCloud platform for comprehensive cluster management.
The article shares a comprehensive methodology for MySQL database inspection, classifying checks by method, time and depth, and detailing availability, reliability, and performance best‑practice items along with concrete command examples and configuration recommendations.
This article explains how to design and implement a terabyte‑level log monitoring platform using ELK Stack, FileBeat, Elastic APM, Kafka Streams, Prometheus, and Grafana, covering data collection, filtering, visualization, and resource‑efficient processing for large‑scale microservice environments.
This article explains how to use Filebeat and Graylog together for centralized log collection, covering Filebeat’s role, configuration files, input modules, Graylog’s architecture, pipeline rules, and step‑by‑step deployment using Docker and docker‑compose, providing practical commands and examples for operational environments.
This article enumerates the most common Linux system log files under /var/log, explains the purpose of each log—including messages, dmesg, auth, boot, daemon, and service-specific logs—and lists key subdirectories for web, mail, audit, and other services.
The article examines the repeated failures of the Xi'an health‑code platform, explaining that the root cause lies in serving all static assets (JS, CSS, images) from a single un‑CDN endpoint, which under peak load of 33 000 requests overwhelms the network bandwidth, leading to a crash.
By analyzing user demographics, business model, and marketing needs, the 58 Daojia case study shows how constructing a cohesive 3D‑driven worldview—through gene‑family characters, mood‑board visual systems, and story‑centric design—enhances operational campaigns, boosts brand immersion, and streamlines visual asset reuse.
This guide walks through installing Prometheus and Node Exporter on a Linux server, copying binaries to system paths, configuring Prometheus with scrape jobs for the local node and remote hosts, and running the exporters with specific collector options for system metrics.
This article describes the design and implementation of a comprehensive log tracking system for a phone SDK, covering client‑side logging, colored classification, plugin mechanisms, cloud‑native architecture, serverless functions, Elasticsearch storage, and real‑time visual debugging to enable rapid issue identification and resolution.
The article explains how a collaborative effort by CAICT and more than 30 leading tech and financial companies created the most comprehensive DevOps efficiency measurement model, detailing its components, evaluation results, and upcoming assessment enrollment for enterprises seeking to boost software development performance.
This article introduces essential Redis operational tools, covering real‑time monitoring with the INFO command and exporters, data migration using Redis‑shake, consistency checking via Redis‑full‑check, and cluster management through CacheCloud, while highlighting key metrics such as stat, commandstat, cpu, and memory.
This article explains the concept of gray release, outlines a simple architecture with essential components, describes common traffic-splitting strategies, shows how to implement control in Nginx and service layers, and discusses complex scenarios such as multi‑service and data‑centric deployments.
This article presents a concise collection of ten Chinese-language resources that summarize the 2021 DORA DevOps report, the importance of consistency in R&D, fundamental efficiency principles, Microsoft’s testing shift, Google’s release and productivity metrics, and SRE health measurements, offering valuable insights for modern software engineering teams.
This article explains how cloud‑native teams can adopt chaos engineering—defining its concepts, outlining its unique characteristics, and detailing a four‑stage implementation process from manual drills to production‑level raids, with practical steps, environment setups, and real‑world results.
This article describes how the open‑falcon monitoring system is applied and customized at Automotive Home, covering its architecture, component roles, a comparison with other open‑source solutions, and the enhancements made for service‑tree based dynamic monitoring, alerting, self‑healing, and high‑availability deployment.
This comprehensive guide presents a step‑by‑step approach for diagnosing and fixing everyday network problems, covering fault scope identification, link and configuration checks, common diagnostic methods, detailed case studies, and essential command‑line tools for IT professionals.
This article explains the purpose, evolution, business logic, architectural design, and key design principles of a payment operations platform, detailing its user groups, system architecture, interaction model, permission management, and security considerations for internal staff in payment companies.
This article explains what Spring Boot Admin is, walks through creating a server and client to monitor Spring Boot applications, shows how to configure ports, enable the admin UI, and set up email and custom alert notifications for operational health monitoring.
China Post Savings Bank’s three core systems passed the Level 3 DevOps Continuous Delivery assessment, showcasing leading domestic capabilities, while senior leaders discuss the bank’s DevOps evolution, measurable improvements, future DevSecOps plans, and the broader industry standards driving these results.
This article examines the concept of work‑hour reporting, exploring its definitions, purposes, benefits such as productivity tracking and profit maximisation, and drawbacks including mistrust, administrative overhead, and misalignment with modern knowledge‑work practices, while also discussing agile approaches to time management.
This guide explains how to trace transaction latency in multi‑vendor server environments, outlines the key monitoring metrics across CPU, network, disk and processes, compares coarse‑ and fine‑grained sampling, and proposes a unified, AI‑enhanced toolkit for diagnosing hardware and software performance bottlenecks.
Ping An Bank’s Starlink DevOps platform was awarded the "industry promotion level" in the first batch evaluation of the China Academy of Information and Communications’ DevOps General Efficiency Measurement Model, highlighting its leading domestic performance and the bank’s commitment to digital governance and fine‑grained R&D efficiency management.
Based on 1,016 valid questionnaire responses and 17 enterprise interviews, the 2021 China Chaos Engineering Survey Report reveals low software system stability, limited adoption of chaos engineering, its positive impact on availability, and provides data‑driven recommendations for improving stability through mature tools, metrics, and cultural shifts.
The article reports on Zhengzhou Bank's successful DevSecOps assessment at the 2021 GOLF+ IT New Governance Forum, detailing the bank's interview on implementation practices, cultural, process and technical measures, and the broader significance of the national DevOps maturity model for digital governance.
This article explains DevOps by tracing its 2008 origins, summarizing evolving wiki definitions, outlining the business drivers behind its popularity, detailing its three core principles—flow, feedback, and continuous learning—and providing concrete technical practices, organizational patterns, and key takeaways for effective adoption.
The article reports on Anxin Securities' successful Level‑2 DevOps technology‑operation assessment announced at the 2021 GOLF+ IT Governance Forum, featuring interview highlights from the CIO and operations head, details of the evaluated Financial Store System, and broader industry statistics on DevOps maturity in the securities sector.
This article walks through a real‑world live‑streaming service alert where response time and goroutine spikes were traced through Grafana metrics, MySQL/Redis performance, routing logic, and Istio sidecar load, ultimately revealing a mis‑reported Istio metric and a resource‑allocation fix to prevent future jitter.
The China Academy of Information and Communications Technology unveiled its DevOps efficiency measurement model, with Baidu’s iReport platform becoming the first to achieve industry‑promotion level certification, and detailed the model’s modules, maturity levels, and practical insights for improving software development performance.
This article details Alibaba's Serverless Infrastructure (ASI) built on ACK, explaining its large‑scale Kubernetes architecture, fully managed operations, change‑risk controls, gray‑release pipelines, web‑shell access, taskflow orchestration, node lifecycle management, elasticity, risk mitigation, probing, and self‑healing capabilities that enable reliable cloud‑native services.
This article explains Docker and Kubernetes logging challenges, compares logging drivers, and presents a unified, node‑agent based logging architecture using S6‑based containers, Filebeat, logrotate, Kafka, and Elasticsearch to achieve reliable, auto‑rotating log collection in production environments.
At the WISE2021 China Digital Innovation Summit, Zhongtong Express CTO Zhu Jingxi detailed the company's digital transformation journey, highlighting the impact of electronic waybills, data-driven operations, AI routing, and privacy security on reshaping the logistics supply chain and boosting efficiency.
This article introduces FinalShell, a free, cross‑platform server management suite that combines SSH, remote desktop acceleration, network monitoring, file transfer, and customizable themes, offering a powerful alternative to XShell for developers and operations engineers.
In this expert round‑table, senior SRE and DB leaders discuss how operations teams must revamp their management philosophy, processes, knowledge systems, and collaboration models—adopting OKRs, DevOps, AI‑ops, and proactive "left‑shift" practices—to thrive in the cloud‑native landscape.
This article uses the historic Battle of Red Cliffs as an analogy to explain service avalanche, its causes in micro‑service architectures, and how circuit‑breaker, rate‑limiting, and isolation techniques can prevent cascading failures in modern distributed systems.
This article shares practical standards for Kubernetes operations—from infrastructure choices and application packaging to CI/CD tooling—helping teams reduce complexity, improve reliability, and foster continuous learning and sharing in fast‑moving cloud environments.
This guide explains how to view and modify Linux's open file descriptor limits using commands like ulimit, sysctl, and by editing system configuration files, covering both system-wide and per‑user settings for improved application performance.
This article introduces three common release strategies—blue‑green deployment, rolling deployment, and canary (gray) deployment—explaining their workflows, advantages, drawbacks, and practical considerations for safely updating production systems during iterative project releases.
This article explains Netflix’s home‑grown monitoring system Telltale, detailing its design, multi‑dimensional health‑assessment model, intelligent alerting, integration with Slack, deployment monitoring, and continuous optimization that together keep over a hundred production applications running smoothly.
This article presents ten GraphQL principles—grouped into integrity, agility, and operations—that guide the design, evolution, and safe production deployment of a unified data graph, emphasizing a single schema, collaborative implementation, versioned registries, performance monitoring, and robust access and demand controls.
This article explains the fundamentals of load balancing, covering why it is needed for high‑traffic services, the difference between vertical and horizontal scaling, various load‑balancing techniques (DNS, HTTP, IP, link‑layer, hybrid), common algorithms, and the trade‑offs of software versus hardware solutions.
The article introduces the freight BCS system, explains its business background, describes multiple validation modes for data consistency and business logic correctness, compares implementation approaches, and outlines the architecture, task flow, and future enhancements to improve system reliability and operational monitoring.
This tutorial walks you through preparing three identical VMs, installing required packages, configuring Rook and Ceph versions, deploying the storage cluster on a Kubernetes 1.20 environment, exposing the Ceph dashboard, and cleaning up the installation, complete with command examples and troubleshooting tips.
The article explains what a digital transformation strategy is, how it strategically leverages IT and data, outlines practical steps for implementation, and describes organizational, talent, technology, and governance measures needed to ensure successful enterprise digital transformation.
The article details Facebook’s multi‑year effort to migrate its heavily customized MySQL 5.6 deployment—including the MyRocks storage engine—to MySQL 8.0, describing the technical challenges, patch‑porting strategy, replication changes, automated verification, and application validation performed during the upgrade.
The article explains four primary backup methods—Normal (full), Copy, Differential, and Incremental—detailing their processes, advantages, and drawbacks, and helps readers decide which strategy best balances storage space, recovery speed, and data protection needs.
This article compiles a series of visual skill maps covering DevOps, cloud computing, big data, security, architecture, and development practices, offering engineers a comprehensive roadmap to build and expand their technical knowledge across multiple domains.
This article explores the fundamentals of ITIL-based event management, detailing its relationship with ITSM, the challenges of unmanaged services, key processes, priority definitions, and three management models—centralized, self‑managed, and collaborative—to help organizations improve service stability and response efficiency.
This article explains common deployment strategies—including blue‑green, rolling, canary (gray) releases, and A/B testing—detailing their principles, advantages, drawbacks, and practical considerations for safely delivering new versions in production environments.
This guide explains how to set up a monitoring environment for the DBLE distributed middleware using Zabbix, covering host and software configuration, MySQL master‑slave deployment, DBLE installation, Zabbix script creation, and template configuration with detailed code examples.
This article explains the origins of Site Reliability Engineering, breaks down its three main layers—Infrastructure, Platform, and Business SRE—covers day‑one and day‑2 deployment, on‑call processes, SLI/SLO design, post‑mortems, capacity planning, user support, and offers practical advice for aspiring SREs.
This guide explains how to format and optimize Dockerfile instructions, choose minimal base images, avoid root users, manage processes, clean caches, and apply best‑practice tips such as proper ENTRYPOINT scripts and labeling to create smaller, more secure container images.
The article analyses why Chinese B2B cloud firms, despite long working hours and abundant talent, lag behind US providers, attributing the gap to product‑driven versus sales‑driven strategies, cultural differences, incentive structures, and low willingness to pay for high‑quality solutions.
This article details iQIYI's unmanned monitoring platform, covering its design goals, overall architecture, core modules such as real‑time data collection, decision engine, and event‑processing engine, as well as the machine‑learning model used for production‑time prediction and the system's operational results and future roadmap.
This article explains the background and challenges of legacy monitoring systems, defines key concepts such as exceptions, problems, alerts and recoveries, introduces critical metrics like MTTA and MTTR, and details the design, architecture, and core implementation of a unified alert convergence service using Redis delay queues.
This article details the end‑to‑end preparation, execution, reporting, and retrospective of a large‑scale production‑environment load test for the Double 11 shopping festival, covering data preparation, QPS target calculation, multi‑scenario testing, issue analysis, and continuous improvement practices.
This article walks through the high‑level components of eBPF programs—backend, loader, frontend, and data structures—showing how the original sock_example.c is split into separate files, how LLVM compiles restricted C to ELF, and how projects like BCC, BPFtrace, and IOVisor automate development, deployment, and cloud‑native observability while highlighting their trade‑offs for embedded environments.
This article traces the evolution of DevOps from its roots in Toyota Production System and Kanban through Waterfall, Scrum, Agile, Lean, and modern extensions like ChatOps, GitOps, FinOps and AiOps, highlighting key milestones and their impact on software delivery practices.
