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MetroCluster IP performance issues

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Applies to

  • MetroCluster IP
  • ONTAP 9
  • Cisco Switches

Issue

  • A latency increase is observed on a MetroCluster IP
  • Clients encounter performance issues
  • Congestion is reported on the MetroCluster IP back-end network:

Example:

Mon Aug 21 14:19:30 +0200 [ClusterA-01: mccip_mirror_congestion_mgr_p: mcc.network.congestion:notice]: Network congestion detected. Action taken: Increased ic_timeout to 2000 msec.

  • CPs exceed the threshold, causing a cp too long:
Example:

Mon Aug 21 15:29:17 +0200 [ClusterA-01: wafl_exempt13: wafl.cp.toolong:error]: Aggregate aggr0 experienced a long CP.

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