Hello list,

i still don't understand why the speed of the rados bench depends so heavily on the threads.

Right now i get around 100MB/s per thread. So 1 thread is 100MB/s, 4 Threads 400MB/s and 16 threads results an about 1100MB/s.

So 1100MB/s is great but i still don't get why 1 thread gets "only" 100MB/s.

Total time run:         30.037374
Total writes made:      8326
Write size:             4194304
Bandwidth (MB/sec):     1108.752

Stddev Bandwidth:       47.5612
Max bandwidth (MB/sec): 1152
Min bandwidth (MB/sec): 948
Average Latency:        0.0577107
Stddev Latency:         0.020784
Max latency:            0.382413
Min latency:            0.026057

Stefan
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