There is a lot of advice around on shutting down a Ceph cluster that says to shut down the OSDs before the monitors and bring up the monitors before the OSDs, but no one explains why.
I would have thought it would be better to shut down the monitors first and bring them up last, so they don't have to witness all the interim states with OSDs down. And it should make the noout, nodown, etc. settings unnecessary. So what am I missing? Also, how much difference does it really make? Ceph is obviously designed to tolerate any sequence of failures and recoveries of nodes, so how much risk would I be taking if I just haphazardly killed everything instead of orchestrating a shutdown? -- Bryan Henderson San Jose, California _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
