[ceph-users] Best/Safest way to power off cluster

Hi Guys, I have recently set-up a production ceph cluster which consists of 3 monitor nodes and 7 Osd nodes. There is power maintenance activity scheduled at the data centre coming weekend and due to that I need to power off all the devices. Can you please advise me on the safest way to power off all servers? Should I power off all 7 OSD servers one by one followed by all 3 monitor nodes or vice versa? Thanks, Gagan