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What is the NFSv3 mount "noac" option?

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Views:: 2,117

Visibility:: Public

Votes:: 0

Category:: ontap-9

Specialty:: nfs

Last Updated:

Applies to

ONTAP 9

Answer

The noac option is a client side option available that disables attribute caching. This option is disabled by default. Unless there's a very specific reason to enable the noac option, NetApp Technical Support does not recommend enabling this option. The NFS attribute cache is a local cache of file and directory permissions. By disabling this cache, a new lookup has to occur each time to validate file and directory permissions. Expect an increase in IO operations and a decrease in performance if this option is enabled.

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