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This guide provides step-by-step instructions for creating and restoring a dump in Redis. Redis is an open-source, in-memory data structure store used as a database, cache, and message broker. Dumps are a way to back up and restore data in Redis.


Table of Contents


Creating a Redis Dump

To create a dump of your Redis database, follow these steps:

  1. Connect to Redis: Open a terminal or command prompt and connect to your Redis instance using the redis-cli command:

    redis-cli -a $(sudo grep -Po '^requirepass \K.*' /etc/redis/redis.conf)

  2. Create the Dump: Use the SAVE command to create a dump of the current database. This command saves the dataset to a file called dump.rdb in the Redis data directory.

    SAVE

  3. Create the Dump: Exit redis environment

    exit

  4. Make a copy: Copy the dump file dump.rdb in /var/lib/redis and make a copy of it

    sudo cp -p /var/lib/redis/dump.rdb /var/lib/redis/dump.bak.rdb

    And, same for the file appendonly.aof

    sudo cp -p /var/lib/redis/appendonly.aof /var/lib/redis/appendonly.bak.aof

    IMPORTANT
    Copy both files otherwise your restoration won't work!

  5. Verify the Dump: Check that the copy of the files dump.bak.rdb and appendonly.bak.aof have been created in /var/lib/redis.

    ls /var/lib/redis

Restoring a Redis Dump

To restore a dump in Redis, follow these steps:

  1. Stop the Redis Server: If Redis is running, stop the Redis server:

    sudo systemctl stop redis-server.service

  2. Replace the Dump File: Restore the dump file dump.bak.rdb in /var/lib/redis

    sudo cp -p /var/lib/redis/dump.bak.rdb /var/lib/redis/dump.rdb

    And, same for the file appendonly.bak.aof

    sudo cp -p /var/lib/redis/appendonly.bak.aof /var/lib/redis/appendonly.aof

    IMPORTANT
    Restore both files otherwise your restoration won't work!

  3. Start the Redis Server: Start the Redis server again.

    sudo systemctl start redis-server.service

  4. Verify the Restoration: Connect to Redis using redis-cli and verify that the data has been restored correctly:

    redis-cli
KEYS *

    This command will display all keys in the database, confirming that the restoration was successful.

Additional Notes

  • It's important to ensure that Redis is stopped before replacing the dump file to avoid data corruption.

For more information about Redis and its commands, refer to the Redis Documentation.