Enabling incremental backups
Steps to enable incremental backups. When incremental backups are enabled, Cassandra hard-links each memtable flushed to an SSTable to a backups directory under the keyspace data directory.
When incremental backups are enabled (disabled by default), Cassandra 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 to provide a dependable, up-to-date backup mechanism. Compacted SSTables will 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, Cassandra 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 package installations | /etc/cassandra/cassandra.yaml |
Cassandra tarball installations | install_location/cassandra/conf/cassandra.yaml |