Tell me about Redis

Redis is a high-performance in-memory data store supporting various data structures: strings, lists, sets, hashes, sorted sets, and more. It is used as a cache, message broker, and low-latency database.

In Go, the go-redis library is often used to work with Redis.

Example of simple usage:

package main

import (
    "context"
    "fmt"
    "github.com/go-redis/redis/v8"
)

func main() {
    ctx := context.Background()
    rdb := redis.NewClient(&redis.Options{
        Addr: "localhost:6379",
    })

    err := rdb.Set(ctx, "key", "value", 0).Err()
    if err != nil {
        panic(err)
    }

    val, err := rdb.Get(ctx, "key").Result()
    if err != nil {
        panic(err)
    }

    fmt.Println("key", val)
}

Redis supports atomic operations, transactions, Lua scripts, which allow for efficient synchronization and caching tasks.