Redis stores data in memory for microsecond read/write speeds — 100-1000x faster than disk-based databases. Common uses: caching (store frequently accessed data to reduce database load), session storage (user login state), rate limiting (track API usage per user), real-time leaderboards (sorted sets), pub/sub messaging, and job queues. Redis supports data structures beyond key-value: strings, lists, sets, sorted sets, hashes, streams, and more.
glossary2 min read
What is Redis?
Redis is a blazing-fast in-memory database for caching, sessions, and real-time data.
Try these tools
More glossary articles
What is WebP?
WebP is a modern image format by Google offering superior compression. Learn when and how to use WebP images.
What is HEIC?
HEIC is the default photo format on iPhones. Learn what it is, why Apple uses it, and how to convert it.
What is JSON?
JSON (JavaScript Object Notation) is the standard data format for web APIs. Learn the syntax and common uses.
What is Regex?
Regular expressions (regex) are patterns for matching text. Learn the basics and common use cases.