CDN

A Content Delivery Network (commonly abbreviated CDN) is a service which provides hosting, network communication and delivery of media over a

large-scale network (usually the Internet, but may also be used for a large company Intranet or a given Telecommunication company's respective Mobile Internet). Cookieless Domains:

Providers

1. CacheFly
2. MaxCDN
3. Akamai
4. Amazon Cloudfront
5. BitsOnTheRun
6. EdgeCast
7. Jstream (Japan only)
8. Limelight
9. Level3
10. Rackspace
11. SimpleCDN
12. SoftLayer
13. Voxel

App Hosting

1. Google AppEngine
2. Microsoft Azure
3. Amazon Web Services (AWS)
4. IBM DevCloud
5. Salesforce.com CRM cloud

Tools

• WebPageTest: http://www.webpagetest.org (test overall website performance/speed)
• ySlow: http://developer.yahoo.com/yslow/
• Varnish Cache server: https://www.varnish-cache.org/ | PRICES (build your own basic CDN atop Apache, nginx, etc... Varnish is a WebApp accelerator also known as a caching HTTP reverse proxy; install it in front of any server that speaks HTTP and configure it to cache the contents; it typically speeds up delivery by a factor of 300-1000x, depending on your architecture)

Resources

• mod-gzip: http://www.gknw.de/development/apache/httpd-2.0/unix/modules/
• mod-deflate: http://httpd.apache.org/docs/2.0/mod/mod_deflate.html
• "Real World" Performance Comparison of CDN (Content Delivery Network) Providers: http://www.paessler.com/blog/2010/05/17/networking-basics/real-world-

performance-comparison-of-cdn-content-delivry-network-providers

• CDN Speed Test: http://www.cloudclimate.com/cdn-speed-test/

Tutorials

• Why loading third party scripts async is not good enough: http://www.aaronpeters.nl/blog/why-loading-third-party-scripts-async-is-not-good-enough
• Compressing Web Content with mod_gzip and mod_deflate: http://www.linuxjournal.com/article/6802
• Cookieless Domains: http://www.symkat.com/cookieless-domains
• Apache mod_deflate setup: http://www.freebsdmadeeasy.com/tutorials/web-server/apache-mod-deflate.php
• How to compile/install mod_deflate into Apache 2.x : http://streetsmartingit.blogspot.com/2007/11/how-to-compileinstall-moddeflate-into.html
• .htaccess – gzip and cache your site for faster loading and bandwidth saving: http://www.samaxes.com/2008/04/htaccess-gzip-and-cache-your-site-for-faster-loading-and-bandwidth-saving/
• Using Varnish as a CDN: http://pattonwebz.info/using-varnish-cdn/
• How to build your own CDN using BIND, GeoIP, Nginx, and Varnish: http://blog.unixy.net/2010/07/how-to-build-your-own-cdn-using-bind-geoip-nginx-and-varnish/
• How To Configure Varnish Cache 4.0 with SSL Termination on Ubuntu 14.04: https://www.digitalocean.com/community/tutorials/how-to-configure-varnish-cache-4-0-with-ssl-termination-on-ubuntu-14-04
• How CloudFront routing works: https://advancedweb.hu/how-cloudfront-routing-works/
• Please stop using CDNs for external Javascript libraries: https://shkspr.mobi/blog/2020/10/please-stop-using-cdns-for-external-javascript-libraries/

External Links

• wikipedia: Content Delivery Network
• wikipedia: NTP server misuse and abuse
• How To Stream Amazon S3 Video On Your Website: http://www.internetmarketingspeed.com/how-to/how-to-stream-amazon-s3-video-on-your-website/
• Japanese Telco KDDI Buys Content Delivery Network CDNetworks For $167 Million: http://techcrunch.com/2011/10/12/japanese-telco-kddi-buys-content-delivery-network-cdnetworks-for-167-million/
• DownDetector down as another Cloudflare outage affects services across the web: https://www.theverge.com/2019/7/2/20678958/downdetector-down-cloudflare-502-gateway-error-discord-outage

See Also

Optimization | Cache | Video | Streaming | Web Server | Apache Web Server