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Long CPs due to a faulty remote disk in MetroCluster IP environment

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Applies to

  • ONTAP 9
  • MetroCluster IP
  • Long consistency points (CP) errors

Issue

  • Aggregate(s) reporting long CPs:

[?]  Tue Apr 31 00:33:46 +0100 [EMSTDCLU4300-03: wafl_exempt10: wafl.cp.toolong:error]: Aggregate aggr1 experienced a long CP.
[?]  Tue Apr 31 01:13:57 +0100 [EMSTDCLU4300-03: wafl_exempt12: wafl.cp.toolong:error]: Aggregate aggr1 experienced a long CP.

  • PerfArchives show latency coming from Wafl Susp CP: 

    clipboard_fe0a49b2-39b3-4457-a736-67e448417e06.png
  • Back-to-back CPs on the affected aggregate(s): 

clipboard_db12100b-f72c-44cf-94d0-e93a4aef083e.png

  • Only 1 remote disk showing high latency: 

clipboard_08811dcb-c786-40c4-a774-e6d47951a73d.png

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