How is data storage implemented in the Redis system?

Redis is an in-memory data store that operates as a key-value data structure. Data in Redis is stored in various structures: strings, lists, sets, hashes, sorted sets, and others. All data is stored in RAM for high-speed access.

For persistent storage, Redis uses snapshot mechanisms (RDB) and command logs (AOF), which periodically save the database state to disk.

In Go, client libraries such as go-redis are commonly used to work with Redis. An example of writing and reading a string:

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

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)
}

Thus, Redis stores data in memory with the ability to periodically save to disk, ensuring high performance and flexibility in working with different data types.