Content Deliver Networks(CDN)

content-delivery-network-worksAs surfing through WordPress forums we found a discussion regarding ” what these Edgecast network and Akamai technologies has to do with blogging platforms like WordPress?”.What  are these Content Delivery Networks(CDN)?.Of course as an networking expert will answer it  quickly, but some how there might be novices who will be interested to know more about what these CDN means?.In fact CDN”s are not only associated with WordPress itself , as you know Google, Microsoft employs it’s own CDN, It’ s spread allover and has become major part of cloud computing and virtualization.Research claims that if your web pages take longer than 5 seconds to load, you lose 50% of your viewers and sales-of course the stats percentage might be more!.So comes the importance of CDN.

A content delivery network or content distribution network (CDN) is a system of computers containing copies of data, placed at various points in a network so as to maximize bandwidth for access to the data from clients throughout the network OR exactly a content delivery network (CDN) is an interconnected system of computers on the Internet that provides Web content rapidly to numerous users by duplicating the content on multiple server’s and directing the content to users based on proximity. A client accesses a copy of the data near to the client, as opposed to all clients accessing the same central server, so as to avoid bottleneck near that server. A CDN will increase speed and efficiency for your blog or site.CDN’s are typically employed by Internet service providers (ISPs) to deliver static or dynamic Web pages but the technology is especially well suited to streaming audio, video, and Internet television ( IPTV ) programming.

As in CDN Edgecast Official site  “EdgeCast has made lightning-fast load times possible for our millions of users around the world.” — says Paul Kim, WordPress.

You can speed up your WordPress(.org) blog by using a CDN to display content to users faster and more efficiently. You can distributes common files or content such as CSS, JavaScript, uploaded images, videos and much more through a CDN, which serves the content from the closest CDN edge server to the end-user.The use of CDN technology has obvious economic advantages to enterprises who expect, or experience, large numbers of hits on their Web sites from locations all over the world. If dozens or hundreds of other users happen to select the same Web page or content simultaneously, the CDN sends the content to each of them without delay or time-out. Problems with excessive latency , as well as large variations in latency from moment to moment (which can cause annoying “jitter” in streaming audio and video), are minimized. The bandwidth each user “sees” is maximized. The difference is noticed most by users with high-speed Internet connections who often demand streaming content or large files.

content-delivery-network-works

CDN’s can distribute static and multimedia content to accelerate delivery of your websites and supplement your infrastructure to help you reach far-off site visitors.However choosing CDN’s must be carefully done  and objectively measure the  CDN performance to measure the benefits that each CDN provides to its end-users in key geographies. It’s an need to evaluate CDN performance to be sure the network solves your specific problem and justify the investment.Once a CDN has been chosen, companies should ensure both ongoing service delivery and SLA (Service Level Agreement) compliance. It is important to ascertain whether, over time, the CDN continues to provide a significant improvement in performance for all your users.

What Are The Advantages Of Using CDN Over Central Server?

  • Speed – All common media files distributed via CDN. For example, files .XXX.com  configured as CDN sub domain. Everything hosted on files .XXX.com is geographically closer to the end-user. If you run DNS query over files .XXX.com , it will return an IP geographically closer to you.This will increase delivery speed and avoids network congestion on your own server.
  • Security – It adds additional level of security.CDN technology is content redundancy that provides a fail-safe feature and allows for graceful degradation in the event of damage to, or malfunction of, a part of the Internet. Even during a large-scale attack that disables many servers, content on a CDN will remain available to at least some users. Still another advantage of CDN technology is the fact that it inherently offers enhanced data backup, archiving, and storage capacity. This can benefit individuals and enterprises who rely on online data backup services.
  • Availability – CDN’s offers 100% availability, even with large power, network or hardware outages.

Content Delivery Service Providers

A list of some of the larger content delivery network providers. Do your own research before purchasing CDN service from any one of the following provider:

CDN World Forum

Taking place on the 21st – 22nd June 2011, the CDN World Forum is a Free-to-attend event and will feature all of the key players within the Content Delivery market. The CDN World Forum will look at the current marketplace with current and future business models. The event will look at implementation strategies with best practice and benchmarking approaches. The CDN World Forum will also define the link between Cloud Computing and Content Delivery Networks.

Ebook Resource on CDN Visit Google Books

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Posted on March 14, 2011, in Technews. Bookmark the permalink. 3 Comments.

  1. CDN mimics , duplicaate original websites ,gives latency info and data.it take us back to old days

  2. awsomey post dude, was search for CDN for projects thanks lot!

  1. Pingback: Compare the Performance of CDN Service Providers « TechNews Blog

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