Redis Data Structures

Redis is in-memory data structure server.

Strings¶

SET user:1:name 'John'
GET user:1:name
INCR page:views
SETEX session:abc 3600 '{...}'

Hashes¶

HSET user:1 name 'John' email '[email protected]'
HGETALL user:1

Lists¶

LPUSH queue:tasks '{...}'
RPOP queue:tasks

Sorted Sets¶

ZADD leaderboard 1000 'player1' 950 'player2'
ZREVRANGE leaderboard 0 9 WITHSCORES

HyperLogLog¶

PFADD visitors 'u1' 'u2' 'u3'
PFCOUNT visitors

Redis = Powerful Structures¶

Strings=cache, Hashes=objects, Lists=queues, ZSets=leaderboards.