Databases Intermediate

What is Redis?

An open-source, in-memory data store used as a database, cache, message broker, and queue with sub-millisecond response times.

Redis stores data in memory for extremely fast read/write operations. It supports various data structures: strings, hashes, lists, sets, sorted sets, streams, and bitmaps. Persistence options include RDB snapshots and AOF logging.

Common uses include session storage, caching (reducing database load), real-time leaderboards, rate limiting, pub/sub messaging, and job queues. Redis Cluster provides horizontal scaling and high availability.

Related Terms

A virtual table defined by a SQL query that provides a simplified or restricted view of data from one or more tables.

Full-Text Search

A technique for searching natural language text in databases using word stemming, ranking, and relevance scoring.

ETL (Extract, Transform, Load)

A data pipeline process that extracts data from sources, transforms it into a suitable format, and loads it into a destination system.

Database Index Types

Different index structures (B-tree, Hash, GIN, GiST, BRIN) optimized for various query patterns and data types.

Time-Series Database

A database optimized for storing and querying timestamped data points like metrics, sensor readings, and event logs.

A database command that shows how the query planner will execute a SQL query, revealing join methods, scan types, and estimated costs.

View All Databases Terms →