System Design Fundamentals

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Push CDN vs. Pull CDN

CDNs can be categorized into two types: Pull CDNs and Push CDNs. Both types aim to deliver content efficiently, but they differ in how they handle and distribute the content.

Pull CDN

In a Pull CDN, the content is not stored on the CDN's servers by default. Instead, the CDN "pulls" the content from the origin server when a user requests it for the first time. Once the content is cached on the CDN's edge server, subsequent requests for the same content will be served directly from the CDN, reducing the load on the origin server.

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nair mohan

nair mohan

· 10 months ago

This disadvantage seems incorrect. All cached content will obviously be stored on origin servers as well no matter which approach is taken

A

Anand Mohan

· 3 years ago

Please explain the above statement. It sounds bit counterintuitive.

In this case Pull CDN seems like a better choice as in Push CDN the resources would be cached but not accessed frequently leading to un-optimal utilisation of storage resource.

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Aldo Gutiérrez Alcalá

Aldo Gutiérrez Alcalá

· 2 years ago

How would you avoid the single point of failure on the origin and CDN server? I can imagine serving a load balancer kind of.

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