Nodetool supports following command to enable incremental backups - 
nodetool enablebackup
However, in cassandra.yaml file, it says that we need to set the setting to true and restart the node.
When I run nodetool enablebackup, it does not update the setting in cassandra.yaml file. So how do we check whether running nodetool enablebackup command actually enabled incremental backups?

What is the best practice to enable incremental backups?