2 machines, 2 units
This deploys a master and slave Apache Spark cluster. By default this bundle uses two units, one for the master, and one for the slave.
In order to increase the amount of slaves, you must add units, to add one unit:
juju add-unit spark-slave
Or you can add multiple units at once:
juju add-unit -n4 spark-slave
By default this bundle will deploy the stable version of the Spark charm, but if you want to follow development you can: