# ceph osd set noout
# ioping -i 0.2 /dev/rbd1
# ssh osd1 reboot (1/3 of all osd, replica 3)
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1115 time=1.3 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1116 time=9.4 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1117 time=9.7 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1118 time=36.5 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1119 time=13.8 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1120 time=32.5 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1121 time=11.3 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1122 time=22.4 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1123 time=1.5 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1124 time=17.5 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1125 time=34.7 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1126 time=18004.0 ms  <-- this one
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1127 time=115.9 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1128 time=42.1 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1129 time=194.0 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1130 time=56.8 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1131 time=41.2 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1132 time=43.5 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1133 time=10099.7 ms <-- and this one
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1134 time=76.8 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1135 time=55.5 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1136 time=24.1 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1137 time=30.2 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1138 time=38.9 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1139 time=20.4 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1140 time=60.7 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1141 time=35.2 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1142 time=21.6 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1143 time=94.9 ms
4096 bytes from /dev/rbd1 (device 200.0 Gb): request=1144 time=94.7 ms