Performance question

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I have a Hammer Ceph cluster on 7 nodes with total 14 OSDs.  7 of which are SSD and 7 of which are SAS 10K drives.  I get typically about 100MB IO rates on this cluster.

I have a simple question.  Is 100MB within my configuration what I should expect, or should it be higher? I am not sure if I should be looking for issues, or just accept what I have.  
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