Why 8.3.x has betther performance than 9.0?

Hi all.


I simulated by spm.


Same Model FAS8040A, same workload - 80% random read 20% random write, same protocol and same disks.


But Ontap 9.0 has poor performance Maximum IOPS and throughput.


I only changed version of Ontap!


Below pictures are performance results at simulated by netapp SPM.


Left image is Ontap9