From sending wedding invitations to conducting business conferences, today almost every simple to complex task is done through Internet. The numbers of Internet users in every corner of the world have increased exponentially resulting in augmented traffic visiting website. To present visitors with the requested information in least amount of time, organizations have started using the facility of Content Delivery Network. Under this system, copies of data are created and stored on different computers present at different geographical locations. Apparently, the working of CDN seems hassle-free but it is quite complex in the real environment. To make any CDN successful, CDN providers have to take care of various factors which together influence the efficiency of the entire system.
Numbers of Nodes in the Network
Each computer system in the network is referred to as a node and the numbers of nodes present determine the output of the system. Though the main purpose of using CDN is to reduce the response time for a website but at the same instant it is necessary to make the system cost efficient. This is the reason why networking professionals think of different possible connections that would boost the performance without increasing the setup and maintenance cost.
Hops for Completing Request
The purpose of replicating data on different computer systems is to deliver the content to the user without taking a few extra seconds. Whichever system is closest to the location of the user is used for completing the request. But since the nodes in the network are limited it has to be decided which node would be used to complete a particular request. The choice of the node is made in such a manner that the numbers of hops are minimum (Hops mean the number of nodes through which the information passes before reaching the user who requested for the information).
Algorithms Used for Completing Requests
The requests in Content Delivery Network are completed automatically and CDN providers use different algorithms to complete this task. The efficiency of CDN system depends greatly on the choice of algorithm as well and thus administrators with good knowledge would design the best algorithm only.
Keeping in mind the growing competition in the virtual market, most businesses today rely on data centers offering the service of CDN. A good service provider would not only ensure the safety of the critical data but also try to make the entire system cost efficient without compromising with the performance.