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.
The article compares Apache Storm and Apache Spark, examining their origins, architecture, language support, integration capabilities, and performance characteristics, and offers guidance on selecting the right platform for real‑time business intelligence based on specific workload and infrastructure needs.
This article summarizes a China Mobile cloud computing talk covering the company’s vision for private and public clouds, core technologies such as lightweight virtualization, distributed scheduling and coordination, the evolution from “small cloud” to “big cloud”, practical reflections on implementation, and strategic recommendations for future development.
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.
This article explains Suning's implementation of a Naive Bayes‑based product classification system, detailing its basic theory, formal definition, step‑by‑step training process, three implementation phases, evaluation results, and error analysis to improve classification accuracy.
This guide walks you through installing HAProxy, configuring it to balance HTTP traffic between two Nginx instances on ports 8080 and 8081, and verifying the setup by repeatedly accessing a test page that alternates between the two backend servers.
The article explains how Storm complements batch‑oriented Hadoop by providing fault‑tolerant, low‑latency stream processing for massive, continuously generated data such as Twitter’s tweet firehose, and demonstrates its architecture, key features, and a simple MapReduce‑style code example.
Project Eru, a homegrown Docker‑based orchestration system developed at Mango TV, replaces earlier PaaS attempts with a stateless, scalable core and agent architecture, leveraging Redis clusters, MacVLAN networking, and fine‑grained CPU allocation to achieve rapid, automated scaling across thousands of containers.
This article introduces load‑generating tools, compares their performance, and provides a step‑by‑step Tsung installation and XML configuration to help engineers build a web cluster capable of handling millions of requests per second.
This article explains the Unix principle that everything is a file, describes regular and special file types, outlines why and how disks are partitioned, introduces mount points, and details the standard Linux filesystem hierarchy and inode metadata.
This article explains how to achieve ultra‑high HTTP request rates by using load‑generating tools such as Apache Bench, httperf, JMeter and Tsung, discusses Linux socket limits, provides step‑by‑step installation and configuration examples for Tsung on CentOS, and shows how to run tests and interpret the results for building a high‑performance web cluster.
This guide explains how to reset a Huawei switch's BootROM login password using the console or telnet, detailing the required commands, menu navigation, and subsequent steps to set a new password while avoiding a reboot that would nullify the changes.
This article explains the browser rendering pipeline, the differences between repaint and reflow, and provides practical tips and code examples to minimize costly layout recalculations for smoother web page performance.
This article introduces a series of algorithms for analyzing the Weibo social network, including label propagation, LDA‑based user similarity, time‑aware and interaction‑aware similarity measures, community detection, influence ranking via PageRank variants, and methods for identifying spam users, illustrating how these techniques can be applied to large‑scale social media data.
This article provides a comprehensive introduction to Git version control, covering its core concepts, key features, essential commands, various workflows such as Centralized, Feature Branch, Gitflow, and Forking, and practical tips for collaboration and history management.
This guide explains how to use the GNU Screen terminal with Zmodem's rz and sz commands to manually transfer files from a local Linux environment to a remote test machine through a jump host that only allows SSH access.
This article details how Dianping’s sub‑40‑person operations team structures its groups, designs a dual‑datacenter architecture, and creates comprehensive monitoring, automation, configuration, and analysis systems—including Zabbix, Cat, workflow, Button, and a custom radar platform—to achieve high‑availability, self‑service, and continuous improvement.
Suning’s search team automatically extracts domain‑specific synonym pairs from massive query‑click logs using candidate extraction, multi‑feature similarity calculations, and Apriori pattern mining, dramatically improving e‑commerce search recall and user experience.
This article ranks CSS selectors by speed, explains the browser's right‑to‑left matching rule, and shows examples of inefficient versus efficient selector patterns for better front‑end performance.
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.
