Apache Cassandra Essentials

Restoring data to Cassandra

In order to restore data from a snapshot onto a node, follow these steps:

1. Shut down the node.
2. Delete the old commitlog files:

   // package based installation
   $ rm /var/lib/cassandra/commitlog/*
   // Tar based installation
   $ rm <install-directory/data/commitlog/*
   

3. Delete the old SSTable files from <data-dir>/<keyspace-name>/<column-family-name>/:

   // package based installation
   $ rm /var/lib/Cassandra/data/apache_cassandra_demo_db/user_table-f99a8ec0110611e5833fa9b7a6da1962/*.db
   // Tar based installation, considering tar is unpacked at /opt/cassandra location
   $ rm /opt/cassandra/data/data/apache_cassandra_demo_db/user_table-f99a8ec0110611e5833fa9b7a6da1962/*.db
   

4. Copy the latest snapshots from the snapshot location to the data ...