Database2026-05-17
Redis
Also known as: Redis / レディス
An in-memory key-value store widely used for session management, caching, pub/sub messaging, and rate limiting. The Redis Stack extension adds full-text search and vector similarity search.
Overview
Redis provides microsecond-latency data access. It handles distributed locks, leaderboards, and real-time ranking scenarios that are impractical with an RDBMS.
AI Agent Caching
Using Redis for semantic caching of LLM responses is a growing pattern to reduce API costs. Upstash Redis is a popular HTTP-based Redis service designed for serverless environments.
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