Primary node requires enough dedicated processing power for job distribution and cluster management. We recommend that for every 5 VM clones on the worker nodes, 1 VM should be removed from the Master.
You are using two FSA3KE units to setup a cluster. One FortiSandbox works as Primary node and the other works as the Worker node.
The Worker node operates 56 VM clones, so the Primary node should remove 11 clones from its processing capacity. In this example, the Primary node should be running 45 (56 – 11) VM clones.
The CLI command
c-master -s80 will take the Primary node to 80% of its VM processing power, which is 45 clones. This means that even if you configure the Primary node to run 56 clones, at any moment, no more than 45 clones can be running.