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Excessive Deduplication jobs may decrease available IOPS and increase latency in ONTAP systems

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Category:
ontap-9
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Perf
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Applies to

  • ONTAP 9
  • AIQUM

Issue

  • Running Active dedupe (SIS) jobs during peak production times can increase workload latency
  • Available IOPS in AIQUM will show to be 0 during that time as below

clipboard_e1d6c82f23b3ac64af54a1800cb8328bb.png

  • Disk latency or utilization may suddenly increase
  • Too many dedupe processes running concurrently, as indicated with:

::> volume efficiency show -op-status active

Note: High CPU due to deduplication without latency is expected and this article is not applicable

 

 

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