Redis in one picture
On This Lesson 4 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
understand what Redis is and how it executes commands.
Planned topics
- Redis is an in-memory data structure server, accessed by key over the network.
- Commands run on a single main thread, one at a time, so each command is atomic.
- Typical uses: cache, counters, rate limiting, sessions, leaderboards, simple queues.
- It is fast because data is in memory, not because it is simple: bad commands can still block everyone.
- Verify version and licensing/fork options (Redis, Valkey) before recording.
Draft outline details
Demonstration
redis-cli session: SET greeting hello, GET greeting, EXPIRE greeting 60, TTL greeting.
Check your understanding
Why is INCR safe without a lock?
Show answer
Commands run one at a time, so it is atomic.
Practice
Apply this lesson with the module's lab, exercises and quiz.
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