REDIS

Le plan de la formation

Découvrir REDIS

• Présentation, principe, structure de stockage
• Contexte d’utilisation

REmote DIctionary Server

• Stockage de données en mémoire
• Key/Value store (Hash, string, List, Set, SortedSet)
• Persistable sur le disque
• https://try.redis.io/

Use cases for Redis

• Caching
• Pub/sub
• Blocking/Delayed Queues
• Short lived items, with ttl
• Counting Reviews most bought items
• Real time Analysis
• Storing Unique items over time

Redis Data Type

• Installation de Redis
• Utiliser les fonctionnalités de Redis

GUI

• Redis-cli
• Redsmin
• Redis Commander
• Redis Desktop Manager
• https://redis.com/blog/so-youre-looking-for-theredis-gui/

KEY

• EXISTS key
• TYPE key
• DEL key
• KEYS pattern
• SCAN pattern cursor

String the most basic data-type

• SET key string optional nx|xx
• GET key
• INCR key
• INCRBY key integer
• DECR key
• DECRBY key integer
• APPEND key string
• MSET key1 string key2 string
• MGET key1 key2 key3

A collection of one or more values is a List

• LPUSH key value
• RPUSH key value
• LRANGE key start end
• LPOP key
• RPOP key
• LINDEX key index
• LINSERT key BEFORE|AFTER pivot value
• BLPOP key second delay
• BRPOP key second delay

Hash is a « dictionary » of fields and values

• HSET key field value
• HGET key field
• HMSET key field1 value1 [field2 value2 …]
• HMGET key field [field2 …]
• HGETALL key
• HEXISTS key field
• HLEN key
• HKEYS key
• HVALS key
• HDEL key field
• HINCRBY key field increment

An unique and unordered collection of values is a Set

• SADD key member [member …]
• SMEMBERS key
• SISMEMBER key member
• SCARD key
• SUNION key1 key2 [key3 …]
• SINTER key1 key2 [key3 …]
• SDIFF key1 key2 [key3 …]

Sorted Set an ordered collection of unique values

• ZADD key score member [score member …]
• ZRANGE key start stop [WITHSCORES]
• ZREVRANGE key start stop [WITHSCORES]
• ZRANK key start stop [WITHSCORES]
• ZSCORE key member
• ZREM key member
• ZCARD key
• ZCOUNT key min max
• ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT offset count]

Streams

• https://redis.io/commands/?group=stream

Développer avec Redis

• https://github.com/predis/predis