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Large file access is slow while reading from cold tier

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182
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Category:
cloud-tiering
Specialty:
perf
Last Updated:

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Applies to

  • ONTAP 9

  • FlexPod

  • FabricPool

Issue

  • Slowness while reading the larger files.
  • qos statistics volume latency show list latency from the Cloud layer. 
Cluster_01::> qos statistics volume latency show -volume Vol1 -vserver SVM1
Workload  ID   Latency    Network    Cluster       Data       Disk    QoS Max    QoS Min      NVRAM      Cloud   FlexCache    SM Sync         
--------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------   ---------- ---------- ---------- ----------
Vol1     566   250.20ms    55.00us    89.00us    76.00us        0ms        0ms        0ms        0ms       250ms      0ms        0ms        0ms
Vol1     566   267.30ms    59.00us    96.00us   112.00us        0ms        0ms        0ms        0ms       267ms      0ms        0ms        0ms
Vol1     566   184.10us    59.00us    97.00us    28.00us        0ms        0ms        0ms        0ms       183.20ms   0ms        0ms        0ms

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