Why Media storage and CDN in HLD? - Purpose & Use Cases

The Big Idea

What if your website's images and videos could reach anyone instantly, no matter where they are?

The Scenario

Imagine you run a website with lots of images and videos. Every time someone visits, your main server sends these files directly to them, no matter where they are in the world.

The Problem

This manual way makes your server slow and overloaded. Visitors far away get slow loading times, and if many people visit at once, your site can crash or become very slow.

The Solution

Using media storage combined with a Content Delivery Network (CDN) stores your files in special places worldwide. When someone visits, the closest place sends the files quickly, reducing load on your main server and speeding up delivery.

Before vs After

✗ Before

Serve media files directly from main server for every request

✓ After

Store media in cloud storage and deliver via CDN edge servers globally

What It Enables

Your website can serve media fast and reliably to users everywhere, even during traffic spikes.

Real Life Example

Think of YouTube: videos are stored in data centers worldwide, so when you watch a video, it loads quickly from a nearby server, not from a faraway main server.

Key Takeaways

Directly serving media overloads your main server and slows down users.

Media storage with CDN spreads files globally for fast, reliable delivery.

This approach improves user experience and scales easily with traffic.