Backend
Redis
An in-memory data store used as a database, cache, and message broker.
Why it matters
- Extremely fast data access from memory
- Versatile: caching, sessions, queues, pub/sub
- Simple yet powerful data structures
When to use
- For caching frequently accessed data
- For session storage
- For real-time leaderboards and counters
Common mistakes
- Storing too much data without memory planning
- Not setting appropriate expiration times
- Using Redis for primary data storage without persistence
Related terms
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