Hello! I have the same problem. After switching off the second node, the cluster hangs, there is some solution? All the best, Alex! 2012/11/12 Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx>: > Am 12.11.2012 16:11, schrieb Sage Weil: > >> On Mon, 12 Nov 2012, Stefan Priebe - Profihost AG wrote: >>> >>> Hello list, >>> >>> i was checking what happens if i reboot a ceph node. >>> >>> Sadly if i reboot one node, the whole ceph cluster hangs and no I/O is >>> possible. >> >> >> If you are using the current master, the new 'min_size' may be biting you; >> ceph osd dump | grep ^pool and see if you see min_size for your pools. >> You can change that back to the norma behavior with > > > No i don't see any min size: > > # ceph osd dump | grep ^pool > pool 0 'data' rep size 2 crush_ruleset 0 object_hash rjenkins pg_num 1344 > pgp_num 1344 last_change 1 owner 0 crash_replay_interval 45 > pool 1 'metadata' rep size 2 crush_ruleset 1 object_hash rjenkins pg_num > 1344 pgp_num 1344 last_change 1 owner 0 > pool 2 'rbd' rep size 2 crush_ruleset 2 object_hash rjenkins pg_num 1344 > pgp_num 1344 last_change 1 owner 0 > pool 3 'kvmpool1' rep size 2 crush_ruleset 0 object_hash rjenkins pg_num > 3000 pgp_num 3000 last_change 958 owner 0 > > >> ceph osd pool set <poolname> min_size 1 > > Yes this helps! But min_size is still not shown in ceph osd dump. Also when > i reboot a node it takes up to 10s-20s until all osds from this node are set > to failed and the I/O starts again. Should i issue an ceph osd out command > before? > > But i had already this set for all my rules in my crushmap > min_size 1 > max_size 2 > > in my crushmap for each rule. > > > Stefan > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
