I have a ceph setup with cuttlefish for kernel rbd test. After I mapped rbd to
the clients, I execute 'rbd showmapped', the output looks like as follows:
id pool image snap device
1 ceph node7_1 - /dev/rbd1
2 ceph node7_2 - /dev/rbd2
3 ceph node7_3 - /dev/rbd3
4 ceph node7_4 - /dev/rbd4
5 ceph node7_5 - /dev/rbd5
6 ceph node7_6 - /dev/rbd6
7 ceph node7_7 - /dev/rbd7
8 ceph node7_8 - /dev/rbd8
But when I collect rbd data by iostat, the output is :
Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz
avgqu-sz await r_await w_await svctm %util
sda 0.00 2.92 1.08 4.41 0.03 0.06 33.05
0.00 0.30 0.56 0.24 0.15 0.08
rbd1 9.92 34.21 1.85 0.91 0.05 0.15 142.94
0.55 200.66 69.51 468.34 4.02 1.11
rbd2 10.47 34.03 1.93 0.87 0.05 0.15 142.04
0.51 183.52 66.95 440.91 3.88 1.09
rbd3 9.42 34.03 1.77 0.89 0.04 0.14 145.27
0.55 206.75 72.06 472.99 4.16 1.11
rbd4 10.10 33.92 1.85 0.87 0.05 0.14 142.78
0.53 195.28 69.46 463.77 4.00 1.09
emcpowerig 9.83 34.07 1.81 0.88 0.05 0.14 142.82
0.55 205.96 70.86 485.70 4.09 1.10
emcpowerhq 10.16 33.91 1.83 0.86 0.05 0.14 144.84
0.50 186.63 69.44 435.40 3.94 1.06
emcpowerha 10.31 34.07 1.86 0.88 0.05 0.15 145.19
0.53 191.68 68.44 451.14 3.94 1.08
emcpowergk 9.32 33.86 1.71 0.87 0.04 0.14 148.83
0.53 206.06 73.89 465.11 4.22 1.09
the device name is not right for rbd{5..8}, I do not know why, anyone can
help me, thanks
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