rados_read versus rados_aio_read performance

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Hello,

We see very poor performance when reading/writing rados objects.  The speed is only 3-4MB/sec, compared to 95MB rados benchmarking.

When you look on underline code it uses librados and linradosstripper libraries (both have poor performance) and the code uses rados_read and rados_write functions.  If you look on examples they recommend rados_aio_read/write.  

Could this be the reason for poor performance?

Thank you,
Alexander.
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