Enabling incremental snapshot backups
When incremental snapshot backups are enabled (disabled by default), DataStax Enterprise hard-links each memtable-flushed SSTable to a backups directory under the keyspace data directory.
This allows storing backups offsite without transferring entire snapshots.
Also, incremental backups combined with snapshots provide a dependable, up-to-date backup mechanism.
Compacted SSTables do not create hard links in
/backups because these SSTables do not contain any data that has not already been linked.
A snapshot at a point in time, plus all incremental backups and commit logs since that time form a compete backup.
As with snapshots, DataStax Enterprise does not automatically clear incremental backup files. DataStax recommends setting up a process to clear incremental backup hard links each time a new snapshot is created.
cassandra.yamlconfiguration file on each node in the cluster and change the value of incremental_backups to true.
Restart each node to recognize the change.