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What is the idle connection timeout value for NFS protocols?

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Applies to

  • ONTAP 9.5+
  • NFS

Answer

Default timeout is 360 seconds.

  • To show nfs idle connection timeout configuration:

::*> nfs show -fields idle-connection-timeout,allow-idle-connection
vserver       idle-connection-timeout allow-idle-connection
------------- ----------------------- ---------------------
svm1_ontap912 360                     enabled
svm2_ontap912 360                     enabled

 

Note: Since ONTAP 9.12.1+ the option and field is named -allow-idle-connection-timeout 

Additional Information

  • The options were introduced in ONTAP 9.5
  • Since ONTAP 9.11.1 -allow-idle-connection is default for new SVMs (RFE 1431560)
  • To enable and set value, use with advanced privilege:

Example:

::*> nfs option -vserver <VSERVER_NAME> –allow-idle-connection enable -idle-connection-timeout 360

Note: This will only apply to new connections made.

  • There is no best practice as it is environment specific.
  • Lower idle timeout may allow for the affected client(s) or users to recover more quickly
  • Use test environment to find optimal setting

 

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