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Write Performance Impacted by Back to Back Consistency Points

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Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

  • ONTAP 9
  • Non-AFF controllers more susceptible to this issue

Issue

  • A FlexVol or FlexGroup is experiencing increased / higher than expected write latency.
  • Latency is reported as Data and Disk latency from qos statistics or AIQ
  • systat -x output shows evidence of CP type CP_Ty B (Back-to-Back) CPs

2020-10-22_17-14-33.png

 

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