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How to optimize NFS mounts for Trident on OpenShift

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Applies to

  • OpenShift Container Platform 4.x
  • OpenShift Virtualization 4.x
  • Trident with NFS-backed StorageClasses
  • ONTAP 9 using NFSv4.1 or NFSv4.2 backends
  • Red Hat Enterprise Linux CoreOS (RHCOS) worker and control-plane nodes

Description

This article provides baseline tuning guidance for Trident environments that use ONTAP NFS backends on OpenShift and show elevated latency or latency spikes under concurrent workloads, including OpenShift Virtualization workloads.

These settings are baseline recommendations, not universal defaults. Performance depends on workload profile, network topology, and backend configuration.

Apply Steps 1 and 2 as the baseline, re-evaluate performance, and use Step 3 only if workloads still underperform. Validate changes during a maintenance window and adjust as needed for the deployment.

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