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Session store.

also: distributed session store · session stores

A shared, fast store (often Redis) for user sessions, so any stateless server can read a user's session by its ID.

the two-minute refresher

A session holds auth state, preferences, cart and CSRF tokens; the client keeps only the session ID cookie.
Every request looks the session up by ID in the shared store.
Servers become stateless and interchangeable.
The store must be fast, replicated and expire sessions (TTL).

Where the course teaches it

W01 · Day 5Session Store Designlearn it →W01 · Day 5Session Store Designrevisit →

Related concepts

Sticky sessions
Stateless service
JWT