The article breaks down how QuickTok supports 30 million concurrent video streams by calculating QPS, storage and bandwidth needs, then applying HDFS with HBase indexing and aggressive CDN pre‑warming to shrink traffic from 88 Tbps to under 4 Tbps.
The article analyzes why Cloudflare only supports HTTP/3 on the client‑to‑edge path, detailing the protocol split, CPU and hardware offload costs, UDP restrictions, and why HTTP/3 remains viable despite not being used for origin fetches.
To support 1.2 million simultaneous viewers, the article details a three‑layer push‑stream‑transcode‑distribution architecture, SRT/WHIP protocols, AV1 GPU‑accelerated transcoding, multi‑CDN edge delivery, a scalable WebSocket message system, Kubernetes‑based auto‑scaling, and extensive performance tuning and disaster‑recovery strategies.
The article explains how a Content Delivery Network (CDN) uses edge PoP nodes, caching, TTL settings, and versioned URLs to move static resources closer to users, reducing latency from hundreds of milliseconds to single‑digit milliseconds and improving overall web performance.
The article explains the funnel model for flash‑sale systems, detailing how layered filtering—via CDN static delivery, gateway rate limiting, Redis pre‑checks, inventory validation, and final database writes—shifts cost to cheap resources, improves scalability, and incorporates time‑based traffic shaping.
The article explains how CDN works as a distributed reverse‑proxy cache, details its DNS‑based load balancing, cache‑hit/miss flow, expiration policies and refresh strategies, compares CDN caching with browser and Nginx caches, outlines scenarios where CDN or Redis is appropriate, and provides typical interview follow‑up questions and practical tips.
This guide walks through setting up acme.sh with DNSPod to perform DNS‑01 validation, automatically obtain Let’s Encrypt certificates, and use hook scripts to upload them to Qiniu CDN, update HTTPS settings, and clean up old certificates, eliminating manual renewal steps.
The author recounts how using Codex to analyze JavaGuide's performance triggered a site-wide outage, then details the step‑by‑step investigation—from cache misconfigurations and hashed asset handling to a VuePress hydration bug—and shares practical lessons on combining AI assistance with disciplined engineering practices.
An investigation revealed that a 1 GB MP4 video streamed to 2,500 users consumed 120 TB of CDN bandwidth because the file’s moov box was placed at the end and the audio‑video tracks were poorly interleaved, causing thousands of HTTP 206 range requests; moving the moov box to the file header with a simple ffmpeg command eliminated the excess requests and reduced bandwidth usage to the video’s actual size.
The article details how Vivo’s front‑end team tackled performance bottlenecks by researching AVIF, designing a graceful degradation strategy with CDN edge caching and asynchronous server transcoding, implementing smart format detection, and validating a 20%+ size reduction over WebP that yielded 15‑25% LCP improvement, 30%+ first‑screen load gains and over 30% bandwidth savings.
Douyin, along with other Chinese internet giants, operates data centers with T‑level (≈1 TB/s) outbound bandwidth, hosts over 200 000 servers, and relies on dual‑link designs, CDN acceleration, and multi‑node load balancing to deliver seamless video streams to hundreds of millions of concurrent users.
This guide walks operations engineers through a systematic, multi‑layered approach to identifying why static resources load slowly, covering data collection, network diagnostics, server configuration, application settings, client‑side checks, common failure scenarios, and automated monitoring scripts.
On March 25, 2026 a malicious script hijacked Apifox's CDN, inflating a 34 KB tracking file to 77 KB and using obfuscated JavaScript, RSA and AES‑256‑GCM encryption to collect system fingerprints, SSH keys, Git credentials and exfiltrate them through a multi‑stage C2 chain.
This article explains how CDN has evolved from basic static‑content caching to a full‑featured edge computing platform that boosts user experience, accelerates dynamic APIs, implements fine‑grained cache strategies, and enforces multi‑layer security, providing concrete configuration examples and performance metrics for real‑world deployments.
In multi‑cloud environments, enterprises face high outbound traffic fees for unified observability, but by routing logs through a CDN and using the high‑performance LoongCollector agent, they can reduce cross‑cloud transfer costs by up to 70%, improve throughput, and simplify deployment.
This guide explains Alibaba Cloud ESA's free CDN tier, covering its generous unlimited‑traffic offering, step‑by‑step application, region‑selection modes, domain integration, special port and cache configurations, renewal tricks, performance benchmarks, and comparisons with competing services.
The article presents a comprehensive guide to building a free open‑source short‑drama mobile app, detailing functional modules, immersive player, personalized recommendations, social interactions, monetization models, and a full tech stack—including Flutter or React Native for the front‑end, micro‑services backend, CDN, and DRM—while addressing high‑concurrency and cross‑platform challenges.
The article outlines a complete open‑source architecture for a short‑video platform, detailing front‑end player features, personalized recommendation, multi‑mode playback, social interactions, monetization models, cross‑platform technology choices, backend micro‑services, CDN, caching, security, and solutions to high‑concurrency and synchronization challenges.
This comprehensive guide walks you through enterprise‑grade Nginx configurations—including core settings, rate limiting, reverse‑proxy best practices, load‑balancing strategies, uwsgi, static‑file optimization, WebSocket/gRPC support, CDN caching, and ready‑to‑use templates for diverse business scenarios.
On the night of November 18 2025, Cloudflare suffered a three‑hour core failure that crippled roughly half of the internet, and this article details the timeline, global impact, root cause in a ClickHouse permission change, and the remediation steps taken to restore service.
Cloudflare suffered a massive multi‑hour outage that knocked offline popular sites and AI services, traced to a sudden traffic spike, a mis‑configured Rust‑based bot‑management module, and a database permission change that doubled a feature file size, overwhelming its routing software.
On the night of November 18 2025, Cloudflare suffered a worldwide outage that crippled services like ChatGPT, X, Spotify, and major gaming platforms, and a detailed post‑mortem reveals that a ClickHouse permission change caused an oversized bot‑management configuration file to crash edge nodes.
A massive Cloudflare outage on November 18, 2025 crippled DNS and CDN services, causing widespread failures for platforms like ChatGPT and Discord, and the article analyzes the incident, past failures, and offers four practical resilience strategies to mitigate over‑reliance on single cloud providers.
On November 18 2025 Cloudflare suffered a widespread network failure that crippled its CDN, DNS, and reverse‑proxy services, causing global sites like ChatGPT and X to return 502‑504 errors before engineers applied temporary mitigations and gradually restored service.
Douyin (ByteDance) operates over 170,000 servers across multiple self‑built data centers with total outbound bandwidth estimated between 7 TB and 10 TB, leveraging dual‑link designs, CDN acceleration, and multi‑node load balancing to support hundreds of millions of concurrent users worldwide.
This guide walks through diagnosing a slow Vue admin dashboard, using webpack‑bundle‑analyzer to spot heavy libraries, offloading Element UI via CDN, enabling gzip compression on Nginx and in the Vue build, and applying code‑splitting and prefetch strategies to keep the first‑screen load under three seconds.
This article examines ByteDance’s enormous server inventory and data‑center export bandwidth, explaining how T‑level (terabit) connections, dual‑link designs, CDN acceleration, and global data‑center deployments enable billions of users to stream content simultaneously.
This article explains key internet application quality metrics such as service success rate, latency, and playback smoothness, examines common deployment models, and provides a detailed overview of Content Delivery Networks—including their architecture, operation processes, content injection methods, request scheduling, and distribution strategies—to help improve performance and reliability.
A personal case study shows how a sudden surge of malicious bot traffic exhausted CDN bandwidth, how enabling referer‑based anti‑hotlinking blocked the attack, and how a local Nginx + Proxifier setup restored image access for the author’s notes.
This article details how test development engineers tackled CDN stability challenges by implementing a dual overseas architecture, automated backend interface validation, and a data‑driven front‑end image detection pipeline, achieving an 80% efficiency gain and minute‑level issue detection.
This article explains how to design and implement a high‑availability, extensible large‑file upload API using Spring Boot, MinIO object storage, MySQL, Redis and CDN acceleration, covering chunked upload, resumable transfers, database schema, core endpoints, and performance optimizations.
A Content Delivery Network (CDN) is a globally distributed set of servers that cache web assets, route user requests to the nearest edge node, and provide faster load times, lower latency, reduced origin load, higher availability, security features, and support a wide range of application scenarios.
This article explains how Douyin, TikTok, Baidu, Alibaba Cloud and Tencent operate self‑built data centers with terabit‑level outbound bandwidth, details ByteDance's server count growth from tens of thousands to hundreds of thousands, and describes the CDN technologies that enable billions of users to stream smoothly.
This article explains how Douyin (TikTok) and other major Chinese platforms achieve massive concurrent usage by operating data centers with hundreds of thousands of servers, employing terabit-level outbound bandwidth, dual‑link designs, CDN acceleration, and multi‑node load balancing, and provides estimates of server counts and bandwidth capacities.
The article explains ByteDance's enormous data‑center bandwidth, server counts, and CDN architecture that enable hundreds of millions of concurrent users on Douyin and TikTok, detailing estimates of total outbound capacity, multi‑link designs, and the role of cloud and IDC resources.
This article explains how to reduce bundle size and improve load speed of large micro‑frontend projects by sharing common dependencies through CDN externalization, using tools such as qiankun, vite‑plugin‑cdn‑import, and Rollup plugins for HTML generation.
This article explains key QoE metrics, network latency components, common deployment models, and the fundamental concepts, workflow, and distribution strategies of Content Delivery Networks that enhance performance, reliability, and security for internet applications.
The paper presents Bilibili’s multi‑layer CDN edge‑node scheduling system, which groups heterogeneous nodes by quality and price, uses cost‑aware and resource‑aware heuristics—including maximum‑flow regional borrowing and contextual‑bandit utilization prediction—to allocate bandwidth per business, achieving a 43 % bandwidth reuse increase, 33 % coverage boost, and markedly lower stall rates.
The article explains how to build a custom Webpack plugin that uploads compiled static assets to a CDN, rewrites public‑path references to CDN URLs, and employs a hash‑based cache file to skip unchanged files, cutting build time from 40 seconds to 17 seconds in large projects.
On June 30, 2026, Akamai will shut down its CDN operations in China, directing remaining traffic to neighboring countries while offering migration paths through Tencent Cloud and Wangsu, and the article explains CDN fundamentals, China’s network landscape, Akamai’s history, and community reactions to the change.
Akamai will cease its CDN services in China on June 30, 2026, partnering with Tencent Cloud and Wangsu for migration, while industry experts discuss the technical challenges, geopolitical factors, and the impact on regulated and non‑regulated sectors.
Akamai will cease its CDN services in China on June 30 2026, offering migration partners like Tencent while explaining CDN fundamentals, benefits, components, and key terminology such as CNAME records, intelligent DNS, and origin protocols for readers planning a smooth transition.
This article presents a comprehensive multi‑CDN disaster‑recovery solution for frontend static resources, detailing the background, current issues, goals, SDK‑based architecture, monitoring and retry strategies, data‑reporting mechanisms, evaluation results, and future dynamic scheduling improvements.
Live streaming faces challenges due to real‑time video transmission and heavy computation, but by using globally distributed edge servers, transcoding streams into multiple resolutions, segmenting them into short clips, packaging them into formats like HLS, caching via CDNs, and optionally storing them in the cloud, the process delivers video seamlessly to viewers and enables replay.
This article summarizes the ACM MM 2024 paper on AutoRec, a timeliness‑enhanced loss‑recovery mechanism for large‑scale live streaming that leverages on‑off mode adaptation, online learning, and injection control to cut video stall frequency by 11.4% and duration by 5.2% without client changes.
The paper “Toward Timeliness‑Enhanced Loss Recovery for Large‑Scale Live Streaming” introduces AutoRec, an on‑off‑mode‑aware packet‑loss recovery mechanism implemented on QUIC that reduces average stall frequency by 11.4% and duration by 5.2% without client‑side changes, and validates its effectiveness in both test‑bed and real‑world CDN deployments.
After receiving unexpected CDN usage alerts, I investigated the spike, identified a malicious IP, and applied access‑control blacklists, anti‑leech settings, UA blocking, and usage‑cap limits, which instantly reduced bandwidth and traffic, illustrating effective CDN security measures.
This article explores a range of web preloading techniques—including DNS‑prefetch, preconnect, preload, prefetch, prerender, the Speculation Rules API, streaming rendering, HTTP/2 push, and Early Hints—detailing how they reduce network latency, improve first‑paint times, and enhance overall user experience.
This article explains the complete journey of a web request—from IP addressing, DNS resolution, and CDN acceleration, through TCP stream handling and message framing, to CGI/FastCGI execution, server model choices, and the evolution of data-layer architectures for scalable applications.
The team built a reusable low‑latency live‑streaming platform for the European Cup that replaces HLS with RTMP over QUIC, reuses VOD bandwidth, automates stream control, and cuts playback latency by 20 seconds while dramatically lowering bandwidth costs and delivering stable 1080p 50 fps HDR video.
This article explains the complete browser navigation flow from URL entry to page rendering and provides practical optimization strategies for DNS resolution, HTTP protocols, CDN usage, and front‑end resources such as HTML, CSS, JavaScript, images, and fonts to improve performance and user experience.
This article explains the complete browser navigation process—from URL entry, DNS resolution, TCP and HTTP communication, to resource loading and page rendering—and presents practical optimization techniques such as DNS prefetch, HTTP/2, CDN usage, and HTML, CSS, JavaScript, and image improvements to boost frontend performance.
The article explains why static assets of a single‑page frontend application disappear after a container restart, analyzes the root cause, and presents a practical solution that stores assets on an external file server or CDN while keeping only index.html inside the container, thereby eliminating 404 errors caused by missing resources.
This article explains what a Content Delivery Network (CDN) is, its architecture and workflow, and outlines its key benefits such as acceleration, global coverage, security, disaster recovery, and cost savings, while also discussing challenges with dynamic resources.
The article walks through every stage of a web request—from IPv4 addressing, NAT, and DNS resolution through CDN proximity and TCP stream handling, to HTTP framing, CGI versus FastCGI processing, stateless versus stateful server models, and finally database scaling techniques such as sharding and Redis caching.
This comprehensive guide explains how to identify and resolve slow web page performance by addressing hardware resources, network configuration, and both front‑end and back‑end optimizations such as server upgrades, CDN usage, HTTP/2, image compression, code minification, caching, and efficient database queries.
This guide outlines a comprehensive, step‑by‑step strategy for creating a highly available, secure, and scalable website—from buying and protecting multiple domains, configuring DNS and CDN, setting up image and database servers, to implementing monitoring, redundancy, high‑concurrency testing, and disaster‑recovery plans.
This article explains how to reduce Flutter Web startup time by splitting the bulky main.dart.js file using deferred components, configuring CanvasKit assets via CDN, and optimizing font loading, complete with step‑by‑step code examples and performance measurements.
This article explains the concept of high concurrency, its key metrics, and presents four practical backend solutions—static/dynamic separation with CDN, read‑write separation using NoSQL and CQRS, various caching techniques, and lightweight read‑optimisation—to improve performance and scalability of distributed systems.
By splitting the main.dart.js bundle with deferred components, serving CanvasKit assets and Google fonts from a private CDN, and optionally using the HTML renderer during development, Flutter Web apps can cut their startup time by five to six seconds, achieving sub‑second load performance.
This article explains why network acceleration is needed, defines CDN, describes its core technologies and scheduling mechanisms, and outlines the CDN system architecture—including routing, edge servers, and security components—to help developers improve web performance and troubleshoot CDN issues.
The article outlines how a VOD provider standardized its multi‑vendor CDN back‑source architecture by classifying videos as hot or cold, prioritizing fragment‑level pulls, throttling full‑file transfers, implementing real‑time monitoring, decoupling storage buckets, and adding OSIG authentication to reduce latency, bandwidth pressure, and security risks.
A June 2024 security breach compromised a popular JavaScript polyfill CDN, injecting malicious code that redirected over 100,000 sites, prompting warnings from Google and GitHub and highlighting best practices for protecting web applications from CDN‑based supply‑chain attacks.
Content Delivery Networks (CDNs) distribute cached content across edge servers to accelerate website access, reduce origin server load, enhance security, provide global coverage, and ensure high availability, while also addressing dynamic resource challenges through routing, protocol, pre‑caching, and compression optimizations.
The 2024 CCTV Spring Festival Gala live stream employed comprehensive stability assurance practices across signal encoding, CDN distribution, request handling, and playback—using multi‑source encoding, multi‑level origin redundancy, multi‑cluster HA, and P2P‑augmented delivery—to handle massive QPS spikes, ensure high availability, and provide a resilient, high‑quality viewing experience.
This article explains how to design an effective multi‑level cache architecture for microservice systems, covering client‑side browser caching, CDN and Nginx static resource caching, application‑layer in‑process caches, distributed Redis caches, and strategies for maintaining cache consistency using message queues.
This article explains how to build a multi‑level caching system for microservice applications, covering client‑side HTTP caching, CDN and Nginx static‑resource caching, in‑process and distributed Redis caches, consistency challenges, and practical guidelines for when such a design is beneficial.
Bilibili’s downstream CDN was rebuilt from a tightly‑coupled scheduler model into a cloud‑native architecture featuring separate gateway, cache, back‑origin and control services that provide layer‑4 and layer‑7 load‑balancing, cluster‑wide health checks, centralized routing, and a refactored NGINX slice module, cutting latency by 40 % and dramatically reducing incidents.
This article explains how to design an effective multi‑level caching system in microservice environments, covering client‑side browser caching, application‑layer static resource caching with CDNs and Nginx, and service‑layer caches using in‑process solutions and distributed Redis, while also addressing consistency and deployment considerations.
This guide explains how to store only original images in Alibaba Cloud OSS and use Object Process Access Point (OPAP) together with Function Compute to dynamically transform images on demand for different devices, thereby reducing storage expenses while supporting flexible processing like watermarking, resizing, and format conversion.
BiliBili created the proprietary BMT (Bili Media Transport) streaming protocol, which consolidates FLV and HLS delivery into a low‑overhead, multi‑track, codec‑agnostic format using QUIC‑accelerated back‑haul, cutting daily CDN back‑haul traffic by over 100 GB and enabling richer live‑streaming features.
This guide outlines a complete, practical workflow for acquiring multiple domains, configuring DNS, deploying CDN and image caches, selecting data‑center locations, setting up redundant servers, implementing monitoring, handling DDoS attacks, planning capacity, securing systems, and organizing an operations team to ensure high availability for large‑scale web services.
At the 2023 Vivo Developer Conference, Cai Chuangye and Ma Yunjie detailed how Vivo short‑video improves playback by optimizing connections, chunked downloads, pre‑rendering and dynamic pre‑loading while cutting CDN bandwidth costs through low‑cost edge devices, neural‑network adaptive compression, and utilization governance, achieving lower latency, fewer failures and reduced bitrate, with plans to adopt H.266.
iQIYI optimized its app’s visual experience by progressively replacing JPG with WebP, HEIC, and finally AVIF—using a caplist‑driven CDN, self‑developed decoders and on‑demand production pipelines—to cut image sizes, reduce CDN bandwidth by over 30 % and maintain quality across static, transparent and animated assets.
This article explains how Content Delivery Networks (CDNs) address internet performance challenges by bringing content closer to users, detailing their working principles, key components such as GSLB and caching, and common application scenarios like website acceleration, file download, and streaming.
This article walks you through building a scalable system—from a single‑server prototype to a multi‑data‑center design that uses load balancers, database replication, caching, CDNs, stateless layers, message queues and automated monitoring—to handle traffic from hundreds of thousands to millions of users.
This article explains why direct file storage on application servers is not scalable, introduces Alibaba Cloud OSS as an object storage solution, walks through bucket creation, access key management, Node.js upload code, temporary credentials for browser uploads, CDN integration, and security considerations, providing a complete end‑to‑end upload workflow.
This article explains how to evolve a single‑server application into a highly available, horizontally scalable system that can serve over a million users by introducing load balancers, database replication, caching layers, CDNs, stateless network design, multi‑data‑center deployment, and message queues.
This article walks through the step‑by‑step process of turning a single‑server prototype into a highly available, horizontally‑scaled system that can serve over a million users, covering server configuration, database selection, load balancing, caching, CDN, stateless networking, multi‑data‑center deployment, message queues, monitoring, and sharding strategies.
This article details a year‑long front‑end performance optimization effort for the Tongtian Tower project, covering analysis tools, caching strategies, code splitting, lazy loading, and business‑logic refinements that together delivered a 58.8% reduction in first‑screen load time.
This article presents a comprehensive guide to front‑end performance optimization, covering metric selection (FCP, LCP, TTI, x‑fmp), data collection and reporting, dashboard creation, network‑ and application‑layer bottleneck analysis, and concrete code‑level improvements for faster page loads.
This guide walks Flutter developers through the advantages and drawbacks of Flutter Web, explains three practical use cases, shows how to create a project, run it locally, handle routing and platform‑specific APIs, configure CDN paths for different environments, debug on desktop and mobile, and finally package and deploy the app to production.
This article explains the full CDN workflow—from DNS resolution and CNAME routing to cache miss handling and origin pull—illustrates when CDN improves performance, how to detect cache misses via HTTP headers, and outlines scenarios where using a CDN may actually slow down delivery.
This article explains how ByteDance's Douyin platform achieves massive concurrent user capacity by operating data centers with multi‑terabit outbound bandwidth, extensive server fleets, CDN acceleration, and dual‑link designs, providing a technical overview of its infrastructure and bandwidth estimates.
This article explains the image‑processing workflow used for the Double Eleven event, covering format selection, CDN scaling and quality parameters, WebP conversion, practical URL suffix rules, and additional front‑end tips that together dramatically improve page load speed and user experience.
Nickel is a high‑performance, XDP‑based four‑layer edge load balancer that replaces Bilibili’s non‑clustered CDN architecture with a co‑deployed control plane and data plane, using hash‑based forwarding, dynamic health‑checks, and two‑hop routing to lower cost, improve load distribution, and eliminate dedicated load‑balancer machines.
This article explains CDN fundamentals, its DNS‑based routing and caching mechanisms, how back‑origin works, when CDN accelerates content delivery, the costs involved, and scenarios where using a CDN may not bring performance benefits.
The article presents a comprehensive strategy for handling API outages by storing data locally with IndexedDB, synchronizing updates through a CDN, and implementing Axios interceptors and Node‑based scheduled jobs to ensure seamless user experience without white‑screen failures.
This article presents advanced Next.js techniques—including dynamic imports, CDN asset publishing, server‑side caching, Incremental Static Regeneration, and custom server integration for WebSockets—to help developers build faster, more scalable, and performance‑optimized web applications.
This article details the August 2023 Bilibili CDN failure, analyzes its root causes, describes the 1‑5‑10 emergency recovery framework, and presents cloud‑side SLB/BFS optimizations and edge‑side scheduling and fallback strategies that together restored service and improved future resilience.
The August 4 2023 Bilibili outage, triggered by automatic back‑origin and domain‑disable policies that flooded the BFS load balancer with traffic, caused widespread white‑screens, but was mitigated within the 1‑5‑10 framework through rapid CDN switching, rate‑limit enhancements, storage backup, and client‑side fallback, illustrating the need for tighter cloud‑edge coordination.
Improving web page load speed is crucial for user experience, and PHP developers can employ methods such as caching, script and stylesheet compression, database query optimization, reducing HTTP requests, using CDNs, output compression, cache plugins, asynchronous loading, and image optimization to significantly enhance performance.
This guide explains why penetration testers need a target’s true IP, how to detect CDN usage, and provides step‑by‑step techniques—including same‑country queries, sub‑domain probing, DNS history checks, FOFA searches, email reverse lookup, and full‑network scanning—to uncover the real server address.
This guide explains how to design and expand server infrastructure to handle millions of concurrent users by using load balancers, database sharding, caching, CDNs, hardware selection criteria, and redundancy techniques, ensuring high availability and performance 24/7.
This article explains why web performance matters, introduces key user‑centric metrics such as First Contentful Paint, Largest Contentful Paint and Cumulative Layout Shift, describes how to measure them with tools like Chrome DevTools, Lighthouse and ftwo, and provides practical optimization techniques including gzip, HTTP/2, CDN, image handling, code splitting and Vue router lazy‑loading.
This guide explains why CDNs hide a site's true IP, how to determine if a website uses a CDN, and outlines practical techniques—including DNS queries, online tools, sub‑domain analysis, email reverse lookup, and scanning scripts—to bypass the CDN and discover the real server address.
This article outlines the progressive evolution of e‑commerce system architecture from a monolithic 1.0 design through layered scaling, read/write separation, CDN caching, sharding, and finally unit‑based modularization, highlighting the performance bottlenecks and solutions at each stage.
This article demonstrates how to accelerate website image loading by applying PHP‑FPM performance optimizations such as image compression with GD, jQuery lazy loading, CDN acceleration, multithreaded parallel fetching, and proper browser‑cache headers, providing complete code examples for each technique.
This article details how a hidden cross‑origin resource sharing (CORS) problem with a single CSS file surfaced during a multi‑project frontend migration to Alibaba Cloud, explains the root cause involving CDN caching without an Origin header, and presents step‑by‑step solutions using Nginx, OSS bucket settings, and CDN configurations.
This article explains how video on‑demand cost is dominated by CDN bandwidth, how player‑side optimizations—such as reducing cache waste, using dynamic buffering levels, smarter range requests, precise preloading, and resolution adjustments—can cut bandwidth by 8% and overall costs by 20% while preserving user experience.
