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Slowness with Low IOPS on Linux client due to NLM port block by VMware Distributed Firewall

  1. Last updated
    May 14, 2025
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28
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
nas
Last Updated:
5/14/2025, 6:09:28 AM

Applies to

  • ONTAP
  • NFS
  • VMWARE

Issue

  • Application report slowness in file transfer jobs with low IOPs reported. 
  • When the application running on Linux triggers Single instance of file access it works well generating around 800-1000 IOPS to the volume
  • when the second instance is triggered from same server/different server to access the same file as above, IOPS on the volume drops to 2-4 IOPS.

 

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