What is the right partitionning scheme to setup a new server?

I would like to install lxd + CEPH on 3 machines.

What is the right partitionning pattern on a machine with 1x1TB HDD and 2x1.92TB SSD ? On freebsd i never asked myself the question since it run zfs natively wich is more flexible. But on linux I generally create 1 root partition on the HDD raid and setup zfs for the second raid. Here instead of the raid I would like to setup CEPH.

Is there a more efficient way to do it? How other do? Any feedback is welcome :slight_smile: