Then indeed back them up! Strange this is not in the documentation. I just checked, I have
ssh_known_hosts -> /etc/pve/priv/known_hosts
They were created when I created the...
My guess on /etc/openvswitch is yes at least make a backup so you can use it later if needed.
About /etc/ssh, unless you changed something yourself you can leave those.
I think both come from a default package install but you never know if someone touched them afterwards.
Yes that bug needs to go away ;-) I have another small question about the usage of the Ceph Jewel in the next release of Proxmox. Will there be an easy way to use BlueStore? Random writes 2x performance I hope it is considered