Starting and Stopping the Database

If necessary, you can use the ybcli to start or stop the Yellowbrick database software independently. These commands do not start up or shut down the system as a whole. The manager nodes and worker nodes are not affected.
database start
database stop
For example:
YBCLI (PRIMARY)> database stop

This will stop the Yellowbrick database and disconnect all database clients
Are you sure you want to do this?
Type yes to continue: yes

Stopping Yellowbrick Database services. Standby... Done

See also ybcli Reference.