ZFS snapdir readability (Crosspost)

[Martin Simmons]

>>>>> On Thu, 21 Nov 2019 14:46:04 +0100, Borja Marcos said:
> 
> > On 21 Nov 2019, at 13:59, Martin Simmons <martin at lispworks.com> wrote:
> > 
> >>>>>> On Thu, 21 Nov 2019 13:12:04 +0100, Borja Marcos said:
> >> 
> >> What I mean is, there is no snapshot mount functionality. If you want to access the
> >> contents of a snapshot you either rollback it or you clone it. There is no
> >> mount.
> > 
> > I think that is incorrect.  You can mount a snapshot on /mnt like this:
> > 
> > /sbin/mount -t zfs filesystem at snapname /mnt
> 
> I’ve never seen that and, indeed, on FreeBSD 12.1 it’s not possible. Or I am terribly
> sloppy today!
> 
> Did I miss anything? Is it a new ZFS on Linux feature?
> 
> 
> root at micro1:~ # mount -t zfs -o ro pool/dataset at snapshot /mnt
> mount: unpul/wwwnfsen at antesinst: Device busy
> root at micro1:~ # 

It looks like unpul/wwwnfsen at antesinst is already mounted -- probably in .zfs :-)

__Martin