A Red Hat Enterprise Linux 6.3+ NFS client may overwhelm an NFS server with RPC requests

Solution Verified - Updated -

Issue

  • Red Hat Enterprise Linux 6.3+ NFS client may overwhelm an NFS server with RPC requests.
  • NFS client with heavy IO workload experiencing hung task timeouts or slow NFS performance
  • NFS client experiencing periodic nfs: server XYZ not responding messages, followed by "nfs: server XYZ OK" messages.

Environment

  • Red Hat Enterprise Linux 6.3 (kernel-2.6.32-279.el6) and higher
  • NFS Client
  • If there is a load balancer in front of the NFS server, it may contribute to this scenario

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