The article examines the challenges of selecting hardware and monitoring tools, comparing Intel CPUs on performance versus price, and outlines criteria for evaluating bypass‑monitoring products, emphasizing cost, reliability, scalability, and data‑decoding capabilities to guide informed operational decisions.
This article explains how to monitor CPU usage on Linux using tools like top, vmstat, and gstat, analyzes common causes of high user and system CPU time, and provides practical tuning methods such as adjusting process priority, using ulimit, and configuring program‑specific CPU settings.
This article explains why Redis high‑availability is essential, details the inner workings of Redis Sentinel, compares several HA architectures—including Sentinel with DNS or VIP, client‑side Sentinel, Keepalived/Haproxy, Redis Cluster, Twemproxy, and Codis—lists their pros and cons, and shares practical best‑practice recommendations for building reliable Redis deployments.
This guide explains website accessibility, describes how people with visual, auditory, motor, and cognitive disabilities interact with the web, and provides actionable steps—semantic markup, color contrast, keyboard navigation, ARIA attributes, form and table best practices, and testing tools—to build inclusive, accessible sites.
This article explains website accessibility, describes how people with visual, auditory, motor, and cognitive disabilities access sites, and provides practical guidelines—including semantic structure, color contrast, ARIA roles, form and table markup, keyboard navigation, media handling, and testing tools—to help frontend developers build accessible web pages.
From Apple’s secret team turning iPhones into medical records to Safari 11’s new WebRTC and WebAssembly support, V8 6.0’s SharedArrayBuffer, Puppet Labs’ DevOps survey, WeChat’s open‑source WCDB, Tencent’s mobile analytics, StackOverflow’s HTTPS migration, and a new front‑end lifecycle model, this roundup covers the top front‑end developments of the week.
This article explains what higher-order components are, how they relate to higher-order functions, and provides a step‑by‑step guide with code examples to extract shared state and lifecycle logic in React components.
This article explains why flv.js is essential for modern browser live streaming, compares common streaming protocols and their latency/performance, outlines flv.js advantages and limitations, and provides a step‑by‑step guide to building a low‑latency live streaming solution with livego and React.
This article explores why Alibaba's middleware is dubbed the architect's cradle, outlines career development routes within the team, details the extensive technology stack, and examines the major technical challenges such as massive data processing, real‑time analytics, and large‑scale deployment during peak events.
This comprehensive guide explains what a database is, distinguishes relational and non‑relational types, walks through MySQL client‑server architecture, details SQL syntax for creating, querying, altering, and dropping databases, tables, and data, and resolves common Chinese character‑set and collation issues with practical commands and examples.
Core ML is Apple’s on‑device machine‑learning framework that integrates deep‑learning, decision‑tree, SVM and linear models into iOS apps, leveraging Accelerate, BNNS and Metal Performance Shaders, and the article demonstrates its use with a ResNet‑50 model, Vision APIs, and complete Objective‑C code.
This article provides a comprehensive guide to Linux performance analysis, covering background concepts, detailed explanations of tools such as vmstat, iostat, dstat, iotop, pidstat, top/htop, mpstat, netstat, ps, strace, lsof, perf, and sar, along with practical command examples and usage tips.
On June 17 in Hangzhou, Alibaba partnered with Huawei and the Android Green Alliance to host an Android developer salon where experts presented the Atlas containerization framework, discussed Android O features, Kotlin adoption, AR/VR and AI impacts, and explored future trends and green, secure mobile app standards.
This article explains the technical distinctions between data deduplication and compression, compares their use in backup versus primary storage environments, and details how major vendors implement these technologies in SSD and flash arrays, highlighting performance, architectural, and operational considerations.
This article explains the fundamentals of character encoding in Python, covering concepts like ASCII, GB2312/GBK, Unicode, UTF‑8, and the differences between Python 2 and Python 3, while illustrating the encoding lifecycle of a .py file with clear examples and images.
This guide walks you through optimizing Ubuntu by updating sources, removing unwanted packages, installing Unity tweak tools, applying the Flatabulous theme and icons, adding a system load indicator, setting up Microsoft YaHei fonts, configuring Zsh, and recommending essential software and DEB installation tips.
Server-Sent Events (SSE) provide a lightweight, HTTP‑based mechanism for real‑time server push, and this article explains its principles, compatibility, and step‑by‑step implementation—including a simple server that streams timestamps every second and a front‑end page that displays the incoming data.
This article explains how to implement a reliable Android music app by leveraging MediaSession for UI‑service synchronization, handling background playback, MediaButton events, AudioFocus, Wi‑Fi and WakeLocks, custom notifications, and compatibility across Android versions.
The article reviews Google I/O 2017, highlighting Android's shift to Kotlin, the introduction of Android O features, the launch of AI‑driven services such as Google Lens, Assistant, and Home, and the broader move from a mobile‑first to an AI‑first strategy.
This guide explains why MySQL may crash after entering the password on Windows, shows how to verify the service status, and provides three concrete methods—including command‑line fixes and my.ini adjustments—to restore normal operation.
