For those brave enough to try, the creators of Proxmox VE have posted documentation on how to upgrade Ceph to Jewel on VE 4.4.
HowTo: Upgrade Ceph Hammer to Jewel
That enables some interesting things, like multiple filesystems per cluster, the new storage engine.
HowTo: Upgrade Ceph Hammer to Jewel
That enables some interesting things, like multiple filesystems per cluster, the new storage engine.