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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

 

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