First we need to check our pools and create a new cache pool.
sudo ceph osd lspools
sudo ceph osd pool create hot_storage 32
Next up we setup the pool as a tier for your data drive and change the mode
to writeback which means that you first write to it before flushing it back to your slower drives. readproxy is better if you have the same kind of speed on your pools as it writes to the data drive and then adds entries to your cache pool when read often.