How to read data in rdb with redis

How to read data from Redis RDB to stop and back up the Redis server. Use redis-rdb-tools to parse RDB files. Read RDB files using the Python library redisrdb or the C library redis-rdb.

How to read data from Redis RDB

For storage in Redis Database (RDB) The Redis data in the file can be read through the following steps:

1. Stop the Redis server:

Use the following command to stop the Redis server:

<code>redis-cli shutdown</code>

2. Back up the RDB file:

For safety reasons, it is recommended to back up the RDB file before continuing:

<code>cp dump.rdb backup-dump.rdb</code>

3. Useredis-rdb-tools Parse RDB files:

Use redis-rdb-tools to parse RDB files, which is a tool for processing Redis RDB files:

<code>redis-rdb-tools dump dump.rdb</code>

This command will print all key-value pairs contained in the RDB file.

4. Use the Python library to read RDB files:

You can also use the Python library redisrdb to read RDB files. ：

<code class="python">import redisrdb

with open('dump.rdb', 'rb') as f:
    rdb = redisrdb.Reader(f)
    for key, value in rdb.items():
        print(key, value)</code>

5. Use the C library to read RDB files:

You can also use the C libraryredis- rdb Read RDB file:

<code class="c">#include <stdio.h>
#include <stdlib.h>
#include <redis-rdb.h>

int main() {
    FILE *fp = fopen("dump.rdb", "rb");
    if (fp == NULL) {
        perror("Error opening RDB file");
        return EXIT_FAILURE;
    }

    redisrdb_reader *reader = redisrdb_create_reader(fp);
    if (reader == NULL) {
        perror("Error creating reader");
        fclose(fp);
        return EXIT_FAILURE;
    }

    redisrdb_keyval *kv;
    while ((kv = redisrdb_read_keyval(reader)) != NULL) {
        printf("%s %s\n", kv->keydata, kv->valdata);
        redisrdb_free_keyval(kv);
    }

    redisrdb_free_reader(reader);
    fclose(fp);
    return EXIT_SUCCESS;
}</code>

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