root@rmi-orem-ceph1-mds1:/tmp/ceph# rados -p test-pool2 bench 50 write
 Maintaining 16 concurrent writes of 4194304 bytes for at least 50 seconds.
   sec Cur ops   started  finished  avg MB/s  cur MB/s  last lat   avg lat
     0       0         0         0         0         0         -         0
     1      16        22         6   23.9954        24  0.813764  0.626271
     2      16        28        12    23.994        24   1.99604  0.894804
     3      16        47        31   41.3222        76  0.455705   1.20747
     4      16        69        53   52.9854        88   1.21179    1.0587
     5      16        91        75   59.9824        88  0.459717  0.982895
     6      16       116       100   66.6471       100  0.850765   0.91001
     7      16       137       121   69.1225        84  0.362036  0.860964
     8      16       157       141   70.4793        80   1.09343   0.85175
     9      16       178       162   71.9786        84  0.501983  0.827019
    10      16       194       178    71.179        64   1.47185  0.851199
    11      16       217       201   73.0694        92  0.485622  0.843191
    12      16       226       210   69.9795        36   1.10679  0.846355
    13      16       232       216   66.4421        24  0.256806  0.833711
    14      16       238       222   63.4108        24    3.4099  0.860639
    15      16       244       228    60.783        24  0.552282  0.847821
    16      16       250       234   58.4836        24  0.257738  0.894465
    17      16       251       235   55.2791         4  0.401178  0.892366
    18      16       255       239   53.0971        16  0.268133  0.960859
    19      16       256       240    50.513         4  0.347407  0.958303
2012-09-12 14:16:56.397565min lat: 0.247071 max lat: 8.16865 avg lat: 1.17433
   sec Cur ops   started  finished  avg MB/s  cur MB/s  last lat   avg lat
    20      16       275       259   51.7863        76  0.573096   1.17433
    21      16       280       264   50.2715        20  0.347762   1.16063
    22      16       292       276    50.168        48  0.350037   1.14019
    23      16       296       280   48.6822        16   1.16028   1.13409
    24      16       300       284   47.3202        16  0.213347   1.12355
    25      16       300       284   45.4275         0         -   1.12355
    26      16       307       291    44.757        14  0.340836   1.18506
    27      16       310       294   43.5436        12  0.278739   1.17639
    28      16       330       314   44.8451        80   0.69491   1.38876
    29      16       341       325   44.8155        44  0.384551   1.35939
    30      16       350       334   44.5213        36  0.245315   1.33026
    31      16       354       338    43.601        16   0.77288   1.32054
    32      16       358       342   42.7383        16  0.212432   1.30858
    33      16       363       347   42.0493        20  0.718888   1.34536
    34      16       365       349   41.0478         8  0.763574   1.34241
    35      16       384       368   42.0458        76  0.589882   1.48295
    36      16       388       372   41.3222        16  0.272351   1.46985
    37      16       392       376   40.6376        16   4.83119   1.49201
    38      16       400       384     40.41        32  0.293355   1.46818
    39      15       416       401   41.1169        68  0.420344   1.48082
2012-09-12 14:17:16.403286min lat: 0.212432 max lat: 9.04833 avg lat: 1.51152
   sec Cur ops   started  finished  avg MB/s  cur MB/s  last lat   avg lat
    40      16       434       418   41.7885        68   1.24687   1.51152
    41      16       452       436   42.5244        72  0.357219   1.48061
    42      16       466       450    42.845        56   1.62158   1.46335
    43      16       488       472   43.8946        88  0.754251   1.44142
    44      16       499       483   43.8967        44  0.362381   1.42489
    45      16       518       502   44.6096        76   1.62336    1.4144
    46      16       534       518   45.0307        64   1.06845   1.40302
    47      16       550       534   45.4341        64  0.859268   1.38923
    48      16       567       551   45.9039        68  0.231214   1.37432
    49      16       579       563   45.9464        48   1.77029     1.368
    50      16       594       578   46.2272        60  0.682652    1.3671
 Total time run:         50.934614
Total writes made:      595
Write size:             4194304
Bandwidth (MB/sec):     46.727

Stddev Bandwidth:       29.5393
Max bandwidth (MB/sec): 100
Min bandwidth (MB/sec): 0
Average Latency:        1.36756
Stddev Latency:         1.74588
Max latency:            9.04833
Min latency:            0.212432