How to backup and restore a Cassandra database?

8 months ago

Liam

2 minutes

Backing up and restoring a Cassandra database can be achieved through the following steps:

Backup the Cassandra database.

Create a backup using the nodetool command: You can create a backup using the nodetool command, for example, by using the following command:
nodetool snapshot -t my_snapshot_keyspace my_keyspace
Copy backup files: Backup files are usually stored in the /data/data/keyspace_name/table_name/snapshots/ directory. These files can be copied to other locations or servers to ensure their security.

Restore Cassandra database

Stop the Cassandra service: It is necessary to stop the Cassandra service before restoring the database to avoid data conflicts.
Restore backup files: Copy the previously backed up files to the /data/data/keyspace_name/table_name/snapshots/ directory.
Restore data using nodetool: Restore data using the nodetool command, for example by using the following command:
nodetool refresh -t my_snapshot_keyspace my_keyspace
Start the Cassandra service: After restoring the data, starting the Cassandra service will complete the restoration of the database.

It is important to note that restoring data may lead to data conflicts or overwrite existing data. It is recommended to back up the original data before proceeding with the operation to prevent data loss.