Redis 7 New Features: What Is Redis Stack

Note: Redis 8.0 reached GA in 2025, adding native vector search and more. This article focuses on Redis 7 features; an upgrade guide will follow.

Redis 7 is more than a version bump—it unifies search, JSON support, and graph databases into one coherent platform. Here’s a quick look at the key changes and when to use what.

Redis 7 Key Changes

Multi-threaded IO

# redis.conf
io-threads 4
io-threads-do-reads yes

2-3x performance improvement.

Redis Stack

Redis Stack = Redis + search + JSON + graph DB.

# install
docker run -d --name redis-stack redis/redis-stack:latest

# use search
FT.SEARCH idx "llm @category:AI"

Selection Advice

Conclusion

Redis 7 + Stack is the trend. But don’t replace PostgreSQL with it.