root@ubuntu:~# ceph osd tree
ID WEIGHT  TYPE NAME       UP/DOWN REWEIGHT PRIMARY-AFFINITY
-1 0.14996 root default
-2       0     host c1
-3       0     host c2
-4       0     host c3
-5 0.14996     host ubuntu
 0 0.04999         osd.0        up  1.00000          1.00000
 2 0.04999         osd.2        up  1.00000          1.00000
 1 0.04999         osd.1        up  1.00000          1.00000