nfsv3 vs nfsv4 ? advantages of moving to v4?

[Jeremy Chadwick]

On Sun, Apr 28, 2013 at 07:10:03PM +0200, Olav Grns Gjerde wrote:
> 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.

Maybe I'm still misunderstanding, but it sounds like what you want (for
NFSv3) is the -alldirs option, e.g.:

/tank -alldirs 10.0.0.20

Which would allow 10.0.0.20 to mount /tank, /tank/backup, /tank/home,
or whatever else under /tank, with 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 |