root@controller11:/home/ceph/bin# rbd showmapped
id pool  image  snap device
0  pool1 image1 -    /dev/rbd0
1  pool2 image1 -    /dev/rbd1
2  pool3 image1 -    /dev/rbd2
3  pool4 image1 -    /dev/rbd3
root@controller11:/home/ceph/bin#
root@controller11:/home/ceph/bin# iostat
Linux 3.2.0-45-generic (controller11)   11/26/13        _x86_64_        (12 CPU)

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           0.28    0.00    0.06    1.13    0.00   98.53

Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
sda              13.37        24.69       627.69     250010    6355292
dm-0             18.55        24.21       627.68     245153    6355168
dm-1              0.03         0.11         0.00       1160          0
rbd0              0.03         0.10         0.00       1030          0
rbd1              0.02         0.07         0.00        676          0
rbd2              0.02         0.07         0.00        676          0
rbd3              0.02         0.07         0.00        676          0

root@controller11:/home/ceph/bin# rbd map image1 --pool pool4
root@controller11:/home/ceph/bin# rbd showmapped
id pool  image  snap device
0  pool1 image1 -    /dev/rbd0
1  pool2 image1 -    /dev/rbd1
2  pool3 image1 -    /dev/rbd2
3  pool4 image1 -    /dev/rbd3
4  pool4 image1 -    /dev/rbd4
root@controller11:/home/ceph/bin# iostat
Linux 3.2.0-45-generic (controller11)   11/26/13        _x86_64_        (12 CPU)

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           0.27    0.00    0.06    1.13    0.00   98.54

Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
sda              13.36        24.64       626.49     250010    6356672
dm-0             18.53        24.16       626.47     245153    6356548
dm-1              0.03         0.11         0.00       1160          0
rbd0              0.03         0.10         0.00       1030          0
rbd1              0.02         0.07         0.00        676          0
rbd2              0.02         0.07         0.00        676          0
rbd3              0.02         0.07         0.00        676          0
emcpowerig        0.02         0.07         0.00        676          0