Hi,

I don't think NFS has the possibility to push notifications about changes in 
the filesystem to the clients. NFSv3 is stateless so the server does not even 
know about the clients. NFSv4 I don't know much about, but I have never heard 
of notifications.

So for NFS kqueue would only trigger if the change is on the same client as 
where the kqueue is lurking.

Otherwise you could run some daemon on the server which pushes the notifications out of band 
of the NFS protocol to the clients. Which probably gives interesting results together with the 
caching of the NFS client. But that is another story we see at work. (postfix -> you have 
mail! -> NFS -> imap -> no you don't -> O yes, you have. :-) )

Regards,
Ronald.


Van: Daniel Braniss <da...@cs.huji.ac.il>
Datum: woensdag, 11 november 2020 09:40
Aan: sta...@freebsd.org
Onderwerp: kqueue and NFS

Hi,
I have a vague recollection that kqueue does not work for NFS files,
any chance that this will be made possible?

cheers,
    danny

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