Static content scaling

The web layer of the architecture is mostly concerned with displaying and collecting data and passing it to the application layer for further processing. In the case of an e-commerce website, each product will have multiple images—and perhaps even videos—to show a product's texture and demos, which means the website will have a great amount of static content with a read-heavy workload since, most of the time, users will be browsing products. In addition to that, users may upload multiple images and videos for product review.

Storing static content in a web server means consuming lots of storage space, and as product listings grow you have to worry about storage scalability. The other problem is that static content (such as high-resolution images and videos) requires large file sizes, which may cause significant load latency on the user's end. The web tier needs to utilize the Content Distribution Network (CDN) to solve this issue...