NFS file cache

Hi,
I am trying to failover 2 RW NFS partition. The problem is the
generation number. I think if I can make clients to request NFS server
everytime it read it, I think it will work. So I am looking for way to
disable NFS cache.
How do I do that?
If I use option to mount actimeo=0, is that same thing as disabling
cache?
Thx,
Paul

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