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Slow NFS performance when client makes small writes

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Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9
  • NFSv3 protocol

Issue

  • Clients hosting applications mounting via NFSv3 experience degraded performance resulting in application-level errors and job failures.
  • Packet traces show many small (8-byte) writes against different file handles and long client-side delays where ONTAP spends the majority of the time waiting on the client for new NFS calls.
  • QoS statistics and performance archives show no storage side or networking bottlenecks.

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