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SMB access failures/slowness during FlexCache cache thrashing

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Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

Ontap 9.12.x and before on Flexcache Origin

Issue

  • Cifs access to specific shared qtree  on flexcache(s) may fail (possibly with generic windows errors)
  • Packet traces may show tree connects or opens against the same path failing after with STATUS_INTERNAL_ERROR
  • Flexcaches for the same volume may exist on multiple clusters
  • EMS may log timeouts for cifs operations such as creates or tree connects
Nblade.CifsOperationTimedOut: Detected a timed out CIFS operation. SMB command for this operation: SMB2_COM_CREATE, Number of times this command was suspended: #, Number of times th
is command was restarted: 0, Last CSM error during this operation: CSM_OK, Remote blade UUID: 123a1234-1a23-45bc-6de7-f12345a6a12a (nodename), Is QoS enabled: QoS_disabled, Last nBlade error during this operation: 410 (Spinnp op has timed out in WAFL), Client IP address: 10.1.1.2, Local IP address: 10.1.1.3, Target Vserver ID: ##, Target disk's DSID: 1234, Target Vserver Name: target_vserver_name

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