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High Cifs latency on FlexGroup constituents from heavy RENAME workload

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Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

  • ONTAP
  • FlexGroup
  • CIFS

Issue

  • High CPU D-blade latency.
  • High cifs latency.
  • Different constituents over multiple nodes are affected.

cluster01::*> system node run -node node-01 -command "wafltop show -v latency -i 10 -n 10"
Latency
                             Application           Latency ms
                             -----------           ----------
    aggr01:VOLUME_FLEXGROUP__0010:cifs:             885.569
    aggr01:VOLUME_FLEXGROUP__0008:cifs:              58.957
    aggr01:VOLUME_FLEXGROUP__0009:cifs:              53.140
    aggr01:VOLUME_FLEXGROUP__0004:cifs:              52.011
    aggr01:VOLUME_FLEXGROUP__0006:cifs:              38.911
    aggr01:VOLUME_FLEXGROUP__0011:cifs:              37.636
    aggr01:VOLUME_FLEXGROUP__0001:cifs:              34.990

  • The FlexGroup CVs had 100% remote placement.

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