This article explores how logs serve as vital diagnostic tools in operations, detailing their definition, practical uses for performance and security monitoring, step‑by‑step analysis techniques, and recommendations for free and commercial log analysis solutions.
A seasoned operations leader discusses how e‑commerce operational support differs from general internet applications, covering longer support chains, consistency models, seasonal traffic spikes, team role separation, mobile‑internet challenges, future planning, and the rise of enterprise‑level ops services.
Learn how to use a single netstat pipeline command to count established connections on port 80, giving you an immediate view of your web server's concurrent connection load for better performance monitoring and troubleshooting.
This article explains the origins, core features, design principles, and deployment resources of Jumpserver, an open‑source Python‑based bastion host that simplifies batch account management, command auditing, and web‑based terminal access for operation engineers.
Learn three powerful shell commands that reveal the most active IPs, the most requested URLs, and the largest files in an Apache access_log, helping you quickly detect anomalies, optimize resources, and improve site performance.
This article explains how JD.com’s Order Fulfillment Center (OFC) was built, re‑engineered, and continuously optimized to handle massive order volumes during major sales events, covering its architecture, migration from .Net to Java, distributed task queues, flow control, and operational practices that ensure reliability and scalability.
This article shares Tencent’s QQ operations team insights on handling legacy issues, standardizing package and configuration management, leveraging the ZhiYun automation platform, and applying capacity management and fault‑root analysis techniques to boost efficiency and reduce costs.
In this interview, seasoned ops veteran Zhijin discusses the similarities and differences between traditional and internet operations, the challenges of building private clouds in finance, advice for ops professionals considering entrepreneurship or job changes, and predicts a future where private, public, and industry clouds coexist.
This guide details how to set up a Cisco 3560G three‑layer switch to support two groups with separate internet exits by defining VLANs, assigning IP addresses, creating ACLs, configuring route‑maps, and applying policy routing to direct traffic through the appropriate upstream routers.
This article summarizes a seasoned operations expert’s insights on data‑center management, covering the evolution from ad‑hoc automation to a closed‑loop CMDB‑driven system, the six key capabilities for future data centers, and practical definitions of operations, automation, and DevOps.
This article explains how a unified LAMP-based solution enables fast development, automated testing, and streamlined operations for large‑scale online services, detailing the architecture’s layers, tooling, and future directions for standardization and platformization.
This guide explains how email systems work—from DNS MX record lookup and server roles like MUA, MTA, MDA, and MRA to the detailed steps of sending, receiving, authentication, encryption, and spam filtering—providing operations engineers with a comprehensive understanding of mail infrastructure.
The article critiques the growing DevOps and full‑stack developer hype, arguing that forcing engineers to juggle development, operations, QA, and DBA tasks devalues specialized work, creates unrealistic expectations, and ultimately harms both productivity and software quality.
The article argues that the growing DevOps culture and the demand for “full‑stack” developers force engineers, especially in startups, to juggle multiple specialized roles—development, QA, operations, DBA—leading to inefficiency, burnout, and a dilution of true software craftsmanship.
Nagios is an enterprise‑grade, open‑source monitoring framework that tracks server, service, and network metrics such as CPU usage, memory, disk space, and network throughput, alerts via email or SMS on anomalies, and consists of a core, plugins, and extensions, though it lacks built‑in reporting and has configuration limitations.
This article details Meituan's supply‑chain system evolution—from its early manual processes to a highly automated, multi‑business platform—highlighting architectural redesign, dynamic forms, and product‑center structures that enabled rapid scaling and diversified service support.
JD’s Order Fulfillment Center (OFC) evolved from a small data‑transfer team into a highly scalable, distributed architecture that handles massive order volumes during events like 618 and Double‑11, employing Java migration, service decomposition, flow control, and robust operations to ensure data consistency and rapid delivery.
A sudden high‑load alert on a web server was traced to Nginx’s massive write operations on fastcgi_temp files, revealed through top, iotop, lsof, strace and iostat, and temporarily resolved by redirecting fastcgi_temp to memory.
This article explains SSD fundamentals, including flash memory principles, device composition, controller functions, common pitfalls, performance degradation causes, and best practices for monitoring and maintaining SSDs in enterprise environments, ensuring reliability and data integrity.
The Linux ‘w’ command provides a richer view of system load than ‘uptime’, displaying average load over 1, 5, and 15 minutes, detailed information about logged‑in users, their CPU usage, current activity, and offers guidelines for interpreting load values on single‑ or multi‑CPU systems.
JD.com’s senior engineers detail how a combination of massive Docker‑based cloud migration, multi‑center transaction architecture, intensive 60‑second recovery drills, and AI‑driven personalization via the JD Brain enabled the platform to handle the unprecedented traffic and data demands of the 11.11 shopping festival.
This article explores how operations managers can define their positioning, adopt multiple leadership roles, and implement effective performance management practices—including clear goal setting, task allocation, coaching, and systematic review—to boost team efficiency and stability.
This guide explains how to install and use the lightweight Linux tool http_load to benchmark web server performance, covering preparation of URL lists, key command‑line parameters, example test runs, and interpretation of the detailed output statistics.
This article shares practical insights from a seasoned KVM specialist on how to monitor hardware, set up alerts, design disaster‑recovery strategies, choose optimal software and hardware, and evaluate public‑cloud providers when migrating workloads to a virtualized environment.
This article shares the author's personal journey of conceiving, planning, writing, and publishing a technical book on Puppet, detailing the motivations, step‑by‑step process, challenges, case studies, and the professional benefits gained from turning the writing effort into tangible value.
The article explains Meituan's supply chain (SCP) process, detailing its role in converting merchant agreements into electronic contracts, the complex data structures, flexible sales models, dynamic auditing, and how automation, workflow, and product‑center modeling address these challenges to dramatically reduce costs and improve efficiency.
This article shares practical production‑level KVM virtualization techniques, covering CPU binding and host‑passthrough, memory management, network optimization with Open vSwitch, storage choices, VM time drift handling, and resource limiting via CGroup, offering actionable insights for reliable, high‑performance virtualized environments.
An in‑depth guide walks readers through building a comprehensive monitoring system for small‑to‑medium enterprises, covering hardware, system, application, network, security, traffic analysis, business metrics, log aggregation, automation, visualization, and practical integration with tools like Zabbix, IPMI, ELK, and Smokeping.
This article examines the characteristics and billing models of multi‑data‑center networks, analyzes external traffic patterns, identifies challenges in optimizing Internet‑facing bandwidth, and proposes practical scheduling strategies to better utilize idle bandwidth and reduce carrier costs.
This article explores why operations teams must adopt a people‑centric mindset, outlines a three‑layer framework of framework, blood (processes & policies) and interface, and provides practical steps for improving processes, technology, and organization to boost efficiency and employee satisfaction.
JobCenter is a distributed task coordination platform that replaces crontab with a unified scheduling, monitoring, and alerting system, enabling e‑commerce teams to manage thousands of web‑service‑based jobs, ensure reliable execution, and gain clear visibility into task performance.
This article provides a comprehensive tutorial on installing the Clip Server (Apache, PHP, MySQL), configuring its virtual host, setting up the Clip SDK with Python, and using various Clip commands to manage IP relationships, all illustrated with command examples and screenshots.
This article explains how Nginx Plus’s commercial stream module enables TCP load balancing, detailing configuration steps, underlying routing algorithms, health monitoring, connection handling, and performance considerations, while comparing it to HTTP load balancing and other layer‑4 solutions.
The article critically examines how the DevOps and full‑stack trends, driven by startup culture, force developers to juggle multiple roles, leading to overwork, reduced focus, and higher costs, while also highlighting nine companies that successfully practice DevOps.
This article recounts a series of July Redis incidents—including network‑card saturation, connection‑limit exhaustion, suspected split‑brain, Bgsave‑induced OOM, and master‑restart data loss—detailing the migration to Redis Cluster with a Smart Proxy, the challenges faced, and actionable remediation strategies.
This article presents a comprehensive set of logging best‑practice rules—from defining log levels and classifications to using RequestIDs, monitoring alerts, and managing log size—aimed at improving system reliability, troubleshooting speed, and operational efficiency.
This article outlines ten practical management principles—from clarifying structure and goals to visualizing work and demanding results—that help leaders improve team accountability, transparency, and continuous improvement in operational environments.
Tencent’s operations team explains how its SET‑based NoSQL clusters deliver ultra‑low latency, high availability, and seamless disaster recovery for billions of users, detailing deployment models, synchronization mechanisms, cost‑saving techniques, and the Data‑as‑Service approach that underpins its massive social platforms.
The article chronicles Tencent's technological evolution across four stages—from massive user growth to flexible platforms—highlighting the strategic use of efficient architectures, dynamic operations, and cloud services that enabled it to support billions of users while maintaining performance and reliability.
In a candid Q&A, industry veterans discuss the fundamental differences between internet and traditional banking operations, share experiences transitioning between sectors, and outline strategies to eliminate difficult data‑center maintenance, highlighting risk‑focused versus growth‑driven approaches.
The article explores Randy Shoup’s insights on Google’s DevOps model, focusing on Dr. Spear’s four capabilities—especially the ways high‑efficiency companies rapidly detect issues, swarm to resolve them, disseminate new knowledge company‑wide, and adopt a development‑led leadership approach.
This article summarizes a DevOps capability model, defining engineering and architectural abilities, outlining OS and application system capability models, and offering practical advice on how Dev and Ops should evolve together to achieve reliable, reusable, and automated operations.
This article explores Randy Shoup’s interview on Google’s DevOps culture, detailing how high‑efficiency organizations instantly detect problems, use swarming to resolve them, document lessons as new knowledge, and foster a blameless post‑mortem culture that drives continuous improvement.
This article examines Meituan's O2O supply chain challenges and how the company transformed a fragmented, manually intensive process into an automated, highly efficient system that reduced order‑entry costs by 90% and boosted efficiency eightfold.
DD Boost allows backup applications to manage and simplify file replication between multiple Data Domain systems, and using NetWorker as an example, the article details the step‑by‑step replication workflow, optional low‑bandwidth and encryption features, and how remote restores are performed.
This guide walks through downloading, installing, and configuring GitLab CE 7.9 on Ubuntu 14.04, covering nginx workarounds, whitelist setup for rack_attack, essential configuration changes, login credentials, and references to official documentation and update logs.
NGINX determines server health through passive checks—stopping forwarding after failures—and active health checks, which periodically probe each backend using the health_check directive, allowing configuration of intervals, failure thresholds, custom URIs, and response matching criteria to ensure reliable load balancing.
This guide explains how to configure a WeChat service account, enable template messages, deploy Python and shell scripts, and integrate them with Zabbix so that monitoring alerts are sent directly to WeChat users as template messages.
This article explains what virtual hosts are, how to configure them in Nginx using server blocks, the syntax for listen, server_name, location, index, and root directives, and provides practical examples with wildcard and regex hostnames, auto‑index settings, and access controls.
This article explains how Keepalived automatically monitors web servers at the IP, TCP, and application layers, removes unhealthy nodes, and reintegrates them once recovered, thereby maintaining high availability and reducing manual maintenance in complex server clusters.
Compiled from the SEI blog series, this article presents concise summaries of the six most popular DevOps topics of the past six months—including Agile integration, ChatOps communication, Vagrant environment consistency, mitigating context‑switching overhead, and a foundational overview of DevOps—offering practical insights and links to the original sources.
This guide walks you through installing Splunk on Linux or Windows, configuring automatic startup, indexing diverse log sources, and using Splunk’s powerful search, Boolean operators, and timeline features to troubleshoot and analyze system and network logs efficiently.
This article describes how Netflix’s technical operations team built an automatic anomaly‑detection system based on the DBSCAN clustering algorithm to identify subtly failing servers from time‑series error‑rate data, evaluate its effectiveness, and discuss practical deployment considerations.
This article compiles and translates a selection of the most popular DevOps blog posts from the first half of 2015, highlighting key tools such as Fabric, Ansible, Docker, and case studies from Amazon and Netflix, and provides links to the original English sources.
This article examines the problems and trade‑offs of metadata protection in cloud object storage, highlighting the importance of reliability, availability, and consistency, and comparing primary‑secondary and multi‑replica models, including the WRN algorithm and practical operational considerations.
This article shares eight practical insights on operations automation—from overall planning and standardization to continuous delivery, DevOps philosophy, leveraging testing, CMDB considerations, aiming for NoOps, and the real impact of Docker—offering a comprehensive guide for modern IT teams.
This article explains how an e‑commerce platform leverages a hybrid cloud architecture to handle massive traffic spikes from marketing events while optimizing costs, and outlines six key considerations for successful implementation.
When managing Linux servers, the du and df commands often show mismatched disk usage figures, and this article explains the three main reasons—reserved space, phantom files, and uncounted data during mount operations—and how to diagnose and resolve each discrepancy.
This guide explains step‑by‑step how to enable the Telnet service on a Huawei switch, set up a time‑range, create a basic ACL that permits a single host, and apply the ACL to the VTY lines to restrict access.
This article explains the responsibilities, requirements, and daily work of Google Site Reliability Engineers, contrasts them with Software Engineers, outlines key internal infrastructure components, and discusses the future direction of operations engineering in the cloud era.
This article chronicles the birth and evolution of China’s Project Scorpio—from its 2011 launch through Scorpio 1.0 and 2.0 specifications—highlighting its collaboration with Intel, its technical trade‑offs with Open Rack, and its impact on data‑center operations and standards.
This article explains how Docker bridges the gap between microservices and operations by standardizing packaging, simplifying multi‑language integration, enabling automated testing and continuous delivery, and reducing the complexity of system evolution and deployment.
This article presents a curated list of ten powerful server monitoring solutions, describing each tool's key features and benefits to help you ensure your web servers remain performant, reliable, and promptly alert you to any issues.
This article explains how to configure ACLs and NAT on a campus router, including static global NAT, outbound NAT with Easy‑IP, loopback interface setup, and verification steps to ensure internal users can reach the server via the public IP address.
The article outlines four key dimensions of operations value—efficiency, quality, cost, and security—explaining how each contributes to business outcomes, the challenges of implementation, and why investing in operations is essentially buying insurance against costly failures.
This article introduces Docker's container technology, explains its architecture and components, demonstrates how to prepare a Docker environment, write and build Dockerfiles, and run containers with common commands, providing practical guidance for developers and operations engineers.
The article reveals how operating‑tool systems, often underestimated, demand high technical rigor to ensure automation success rates and absolute reliability for emergency actions, requiring sophisticated failure handling, capacity awareness, and scalable design—challenges comparable to core online services.
This article chronicles the progression of image server architectures—from simple single‑machine storage to clustered, shared‑storage, and FastDFS‑based distributed systems with CDN acceleration—highlighting the challenges of capacity planning, synchronization, fault tolerance, and migration while offering practical recommendations for scalable backend design.
Load average measures the average number of processes waiting for CPU over 1, 5, and 15 minutes, differing from CPU utilization; this article explains the concepts, ideal values, illustrative analogies, and practical steps to assess and reduce server CPU load for better performance.
The article records a Q&A session from the Efficient Operations talk, where guest Peng Zhef of Mango TV discusses Docker, Redis Cluster, container resource controls, and related operational challenges, providing practical insights into Python/Flask development, pod scaling, and Linux cgroup tuning.
At QCon London, GDS architect Michael Brunton‑Spall explained how DevOps principles underpin successful microservice operations, covering service identification, initial creation, ownership, essential tooling, monitoring depth, failure handling, and practical deployment practices for scaling from a single service to a full ecosystem.
This article summarizes a guest speaker’s deep dive into Docker’s core technologies, ecosystem, emerging trends, and market impact, highlighting how container isolation reshapes traditional operations, the challenges of adoption, and practical guidance for integrating Docker into production environments.
This guide introduces essential Docker commands—from pulling images and managing containers to inspecting and removing them—providing clear examples and best practices for safely operating Docker on any system, including host file configuration, interactive sessions, background execution, and cleanup procedures.
This article explains the structure of HAProxy configuration files, detailing the five sections—global, defaults, frontend, backend, and listen—along with key directives such as daemon, maxconn, mode, timeouts, bind, and server, and shows how they work together to manage traffic and monitoring.
This article explains what Linux swap is, its drawbacks, how to tune the swappiness parameter, methods for monitoring swap usage per system and per process, and practical ways to clear swap, including useful shell scripts and commands.
The article details Weibo's evolution toward multi‑active cross‑datacenter deployment, describing initial motivations, early synchronization attempts, the eventual MCQ‑based messaging solution, operational challenges such as latency and data consistency, and best‑practice recommendations for large‑scale distributed systems.
This article examines how the rise of diverse technology stacks creates operational bottlenecks and explains why Docker’s container approach offers a flexible, distribution‑agnostic solution that lets teams adopt the right tools without sacrificing productivity, ultimately turning the “one‑hammer” dilemma into a modular, cloud‑native workflow.
The article outlines how narrowing operational permissions, automating processes, and adopting data‑center operating systems enhance security, scalability, visibility, and fault handling while reducing manual effort and enabling rapid, low‑risk changes across large infrastructures.
Meiya addresses typical startup challenges—small user base, rapid requirement changes, and an evolving team—by prioritizing development efficiency through standardized RESTful communication protocols, a four‑stage deployment pipeline, reusable frameworks, DB migrations, command‑line tools, logging with ELK, and automated server management via SaltStack.
This article provides a comprehensive overview of Google’s Borg system, detailing its purpose, user perspective, workload types, cluster and cell architecture, job and task management, scheduling algorithms, scalability techniques, and availability mechanisms for large‑scale distributed environments.
This article examines the evolution and logic of data center standardization, discussing server customization, IT and mechanical module standardization, the value of modular designs, practical examples from major tech companies, and offers guidance for both large and small users on adopting modular, standardized data center solutions.
This article presents a methodology for modular data center implementation, emphasizing the essential role of standardization—distinguishing design from prefabrication—and analyzes how leading companies like Google, Microsoft, and Facebook apply these processes, while also comparing colocation providers such as Digital Realty Trust.
This article examines the concept of modularity in data centers, explains how standardization underpins true modular design, compares industry approaches such as micro‑modules and containerized solutions, and analyzes the standardization levels of major tech companies and colocation providers to guide implementation decisions.
This article summarizes a comprehensive talk on Puppet covering its evolution, core concepts, architecture, ecosystem, practical use cases such as building a CMDB, automated deployment pipelines, OpenStack deployment, and the interplay with Docker, highlighting how Puppet drives modern operations automation.
This article examines the rapid growth of data centers, defines modular data center concepts, compares real‑world modular designs, outlines core modular attributes, and analyzes market participants and the benefits of modularization for efficiency, cost, and operational simplicity.
This article details how the high‑traffic mobile platform 糗百 migrated its massive image repository to Qiniu Cloud without service interruption, using the qrsync upload tool combined with Qiniu’s mirror storage to smoothly transfer cold data, handle hot data, and alleviate I/O bottlenecks.
Dropbox operations engineer Rajiv shares practical scalability design techniques, including load‑testing, app‑specific metrics, Bash analytics, log management, UTC usage, and the reliable technology stack that enables a service with 40 million users to run with a very small operations team.
This guide shows how to configure traffic statistics on two switches by creating ACLs, traffic classifiers, behaviors, and policies, applying them to specific GigabitEthernet interfaces, and finally displaying the traffic policy statistics from the command line.
This guide shares ten practical fault‑management techniques—ranging from proactive attitude and prioritizing incidents to continuous follow‑up and team collaboration—to help operations teams reduce damage, maintain service reliability, and keep users engaged during outages.
This article outlines the concept of efficient operations, analyzes why it is difficult to achieve, and presents practical strategies—including clear responsibilities, technical specialization, management professionalism, and good customer interaction—to improve operational efficiency in technology teams.
This article explains why many IT teams struggle with code that works in development but fails in production, introduces Puppet as a configuration‑management platform, describes its declarative language, resources, types, providers, classes, manifests and modules, and shows how it enables reliable, collaborative DevOps workflows.
This article outlines four key practices—comprehensive engineering documentation, robust business backup, continuous online monitoring, and regular periodic inspections—that together ensure optimal performance, reliability, and long‑term benefits for data center operations.
This article compiles a comprehensive list of open‑source tools covering backup, cloning, cloud platforms, cloud workflows, distributed file systems, cloud storage, code review, collaboration suites, CMDB, configuration management, continuous integration/deployment, DNS, hosting control panels, IT asset management, and LDAP, providing a valuable resource for IT professionals.
This article examines how load‑balancing technologies such as Nginx, LVS, and HAProxy are chosen according to website scale, outlines their respective strengths and weaknesses, and describes typical deployment stages from simple single‑point setups to complex multi‑layer architectures.
This article examines how WhatsApp grew its user base, message volume, and infrastructure dramatically over two years while keeping the engineering team at ten, detailing the architectural choices, Erlang‑based stack, hardware scaling, decoupling strategies, and the operational challenges that led to both performance gains and a major outage.
This article explains various load‑balancing scheduling algorithms—including Round Robin, Weighted Round Robin, Least Connection, Weighted Least Connection, Adaptive Agent‑Based balancing, Fixed Weighted, Weighted Response, and Source IP Hash—detailing how each distributes traffic and handles server capacity differences.
This article explains the definitions of concurrent users (Vu) and transactions per second (TPS), provides practical methods for estimating these metrics in new and existing systems, and outlines how to calculate resource usage such as connection counts, memory, and file descriptors.
This article outlines eBay's practical scalability best practices—including functional partitioning, horizontal sharding, avoiding distributed transactions, asynchronous design, virtualization, and judicious caching—to help large‑scale web systems achieve reliable, cost‑effective growth.
This article describes how a Linux operations team streamlined frequent web code releases by building a web‑based deployment system that combines Git for version control, Rsync for synchronization, and Python/Tornado for backend services, eliminating manual intervention and improving efficiency.
This guide explains how to identify high‑frequency visitor IPs from Nginx logs and configure Nginx to deny those IPs—or entire ranges—using block files, includes, and reload commands, providing both basic and advanced blocking techniques.
