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Large IO write size resulted in poor write latency in CVO

 

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cloud-volumes-ontap-cvo
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Perf
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Applies to

  • Cloud Volume ONTAP 9.x
  • Microsoft Azure

Issue

  • High Write latency observed in AIQUM tool / QOS statistics. 
    • Latency breakdown indicates latency is driven from the Data layer.
  • Extremely high write latency (above 500ms) for larger block size >100KB. 
  • For smaller block size <20KB write latency is <1ms

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