Evaluation of CDN’s Design
Analyze how a CDN design meets essential non-functional requirements like performance, availability, and scalability. Understand the role of distributed proxy servers, intelligent routing, and redundancy in achieving reliable, low-latency content delivery for web-scale systems.
We'll cover the following...
Requirements compliance
We will now evaluate how our design fulfills the core requirements: high performance, availability, scalability, reliability, and security.
Performance
The CDN achieves high performance by minimizing latency through the following design decisions:
Proxy servers serve frequently accessed content directly from RAM.
Proxy servers are geographically distributed to sit closer to users.
Deploying proxy servers within ISPs or internet exchange points (IXPs) handles high traffic efficiently.
The request routing system directs users to the nearest proxy server, as discussed earlier.
Proxy servers store
long-tail In a long-tail distribution, a small portion of content generates the majority of traffic, while a large number of less popular items make up the rest.