[root@ceph-node1 ceph]# ceph osd tree
ID WEIGHT TYPE NAME           UP/DOWN REWEIGHT PRIMARY-AFFINITY
-1      0 root default
-2      0     host ceph-node1
 0      0         osd.0            up  1.00000          1.00000
 1      0         osd.1            up  1.00000          1.00000
 2      0         osd.2            up  1.00000          1.00000
-3      0     host ceph-node2
 3      0         osd.3            up  1.00000          1.00000
 4      0         osd.4            up  1.00000          1.00000
 5      0         osd.5            up  1.00000          1.00000
-4      0     host ceph-node3
 6      0         osd.6            up  1.00000          1.00000
 7      0         osd.7            up  1.00000          1.00000
 8      0         osd.8            up  1.00000          1.00000
[root@ceph-node1 ceph]# ceph osd pool ls detail
pool 5 'datapool' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 512 pgp_num 512 last_change 107 flags hashpspool stripe_width 0