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FlexGroup volume reports a lower ops than the sum of ops from all the constituent volumes

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Category:
ontap-9
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Perf
Last Updated:
  •  

Applies to

  • ONTAP 9.1 and later
  • FlexGroup

Issue

FlexGroup shows a lower ops than the sum of ops from all the constituent volumes. Supposedly, they should be same. 
 
Example: A FlexGroup volume with 16 constituent volumes. 
  • This is reported from Active IQ Unified Manager. 
  • The first line in IOPS - Total view is the ops for the FlexGroup volume, which is around 532k/s
  • The rest ops are reported from all the 16 constituent volumes, the sum is 613k/s, which is 81k/s higher than the FlexGroup volume ops. 
 
FlexGroup volume reports a lower ops than the sum of ops

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