System Design Fundamentals
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Origin Server vs. Edge Server

Both kinds of server hand content to users, so it is easy to blur them together. They do different jobs.

The origin server holds the original content. Edge servers hold cached copies of it, closer to the users.

The Origin Server

The origin server is the primary source of the original, unmodified content. It hosts the site's HTML files, images, stylesheets, JavaScript, videos, and other digital assets.

When a user requests something and no cached copy exists anywhere, the request goes to the origin server.

**It is centralized storage

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