The article presents the architecture, component design, optimizations, and reliability guarantees of Bilibili's Lancer log collection system, a Flume‑based distributed pipeline that handles both real‑time and offline data streams for billions of events daily.
This article explains the concept of caching in Java, the importance of reducing database I/O, introduces Spring Cache annotations and their limitations, demonstrates conditional caching with code examples, and provides configuration details for integrating Ehcache and Redis as cache providers.
This tutorial explains how to create rational, layered choropleth maps using Python libraries like Pandas together with Vega and GeoJSON, covering data preparation, FIPS mapping, and generating visualizations for population density, income, and unemployment rates.
This article explains how to detect whether inbound or outbound packets are being dropped on a Linux system, shows how to use netstat, dropwatch, and perf to pinpoint the cause, and provides step‑by‑step commands and example outputs for debugging packet loss.
This article explains the concept of Database-as-a-Service (DBaaS), introduces MongoDB’s core capabilities, outlines the essential components such as lifecycle management, disaster recovery, monitoring, and value‑added services, and provides practical guidance on building a production‑grade MongoDB DBaaS platform.
JD’s self‑constructed data center in Suqian, Jiangsu, combines innovative free‑cooling, high‑efficiency chillers, redundant power architecture, and advanced monitoring to deliver over 180 days of natural cooling, reduce PUE to ≤1.3, and ensure continuous operation with robust backup systems.
This article explains Alibaba Cloud's Server Load Balancer (SLB) architecture and its four-tier high‑availability design—application processing, cluster forwarding, cross‑zone disaster recovery, and cross‑region disaster recovery—detailing both product features and user‑side best practices.
This article explains the definition, origins, business benefits, and future of Network Function Virtualization (NFV), its relationship with Software‑Defined Networking (SDN), and how industry groups like ETSI and OPNFV are shaping its adoption in modern data centers.
This guide explains how to set up the development environment, create a C# class‑library project, add Fiddler references, implement required interfaces, enable debugging, and build a custom Fiddler plugin that automatically decrypts encrypted SDK HTTP requests and displays them in clear text for testing.
This article provides a comprehensive tutorial on Java I/O streams, covering byte streams, character streams, buffered streams, line‑oriented I/O, scanning and formatting APIs, command‑line I/O, data streams for primitive types, and object streams for serialization, with detailed code examples and best‑practice guidelines.
The article explains what a user satisfaction model is, why it matters for product evaluation, and outlines a step‑by‑step methodology—including defining dimensions, collecting questionnaire data, applying statistical techniques, creating a two‑dimensional evaluation matrix, and deriving actionable improvement plans—to quantitatively assess and enhance user experience.
This article dissects Java 8’s LinkedList class, explaining its double‑linked node structure, key fields, constructors, and core methods such as add, remove, clear, get, and set, while contrasting its performance characteristics with ArrayList for insertion, deletion, and random access.
This guide explains how to permanently disable SELinux, temporarily change its mode, and provides a comprehensive tutorial on using iptables—including table concepts, basic commands, rule management, scripting, NAT configuration, and saving/restoring firewall rules—on Red Hat/CentOS Linux.
This article walks through using NetEase's NEJ framework to decompose a complex single‑page web application into hierarchical modules, create and format dependency trees, register external and layout modules, define module directories, implement module logic and messaging, and finally integrate and package the system for scalable deployment.
This article explains the complete process of chart design—from understanding data visualization fundamentals and identifying key metrics to tailoring designs for specific users, choosing appropriate chart types, refining axes and labeling, and applying core design principles for clear, efficient communication of information.
This tutorial shows how to craft a standout, tech‑savvy resume by using GitHub Pages, HTML5, and Markdown, covering GitHub Pages basics, limitations, repository setup, editing, deployment, and additional modern resume‑building tools for developers.
Inspired by a tutorial, I created a MongoDB‑backed crawler for the Yisou novel website, extracting category links, managing URL states across multiple processes, handling millions of pages, and finally deduplicating the results to obtain a clean collection of books.
The article explains how rapid internet growth has expanded data centers, why traditional operations fall short, presents a simple utilization formula, shows Alibaba’s mixed offline‑online scheduling experiment that raised server usage from 10% to over 40%, and announces an open dataset for academic research.
This article explains hiproxy's core proxy mechanisms, including HTTP and HTTPS request handling, automatic certificate generation, plugin architecture, and browser proxy configuration, providing developers with a comprehensive overview of its implementation and extensibility.
This article explains why performance testing is often delayed in CI/CD pipelines, outlines the prerequisites and environment tiers needed for automated performance testing, and describes how tools like XMeter can enable standardized, continuous performance validation within DevOps workflows.
