I need to setup a two node cluster with a third PBS node. I wanted to understand how the cluster works, and the services to configure to activate it. In essence, does the two-node cluster work with replicas? Can you tell me the documentation to follow for testing? In this configuration, I thought of putting two SAS disks on the PBS to reduce costs and putting three SSD disks in the two nodes respectively, of which two per node in ZFS RAID mode. Can you tell me the documentation to follow?