nfsv3 vs nfsv4 ? advantages of moving to v4?

[Olav Grønås Gjerde]

If you have three ZFS filesystems:
tank
tank/backup
tank/home

And if you export /tank with nfsv3, you don't really export /tank/backup
and /tank/home.
You only export the folders, but not it's content
I think it has to do with that you cannot export mounted filesystems within
one exported filesystem.

With nfsv4 you will with only one export of /tank, export all three,
including /tank/backup and /tank/home

This was an issue 18 months ago, I cannot confirm if it's still an issue.



On Sun, Apr 28, 2013 at 4:58 PM, Jeremy Chadwick <jdc at koitsu.org> wrote:

> On Sun, Apr 28, 2013 at 04:53:53PM +0200, Olav Grns Gjerde wrote:
> > The main reason I moved to nfsv4 was that I could export multiple ZFS
> > filesystem with just one export. With nsfv3 I could only export one ZFS
> > filesystem per export.
>
> When you say "one/per export", what exactly do you mean?
>
> For exporting ZFS filesystems via NFS, I've always used /etc/exports.
> I've never used the "share" property per ZFS filesystem, because in my
> experience (at the time -- this was early days of ZFS on FreeBSD) it
> just flat out didn't work.  Using /etc/exports always worked for me.
>
> I always liked having all my exported filesystems in one place
> (/etc/exports), versus UFS ones in /etc/exports + ZFS ones requiring me
> to use "zfs get ..." and so on.
>
> Does it really bother you that much to have multiple lines in
> /etc/exports (using NFSv3)?
>
> --
> | Jeremy Chadwick                                   jdc at koitsu.org |
> | UNIX Systems Administrator                http://jdc.koitsu.org/ |
> | Mountain View, CA, US                                            |
> | Making life hard for others since 1977.             PGP 4BD6C0CB |
>