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How to read data in rdb with redis

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Release: 2024-04-07 11:24:20
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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 in rdb with redis

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>
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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>
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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>
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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>
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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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