ZFS: exclude one FS from recurive snapshot creation? Or some equivalent to "nodump" for dataset?

[Dmitry Morozovsky]

On Mon, 20 Apr 2015, Steven Hartland wrote:

> Thinking outside the box a little, create the recursive snapshot then remove
> the snapshot for that user?

or, even invent your own property like

zfs set org.freebsd:nosend=yes pool/path/to/fs

and then (could be optimized, but):

zfs snap pool at snapname
zfs get -H -o name,value -t snapshot org.freebsd:nosend | \
	awk '$2 == "yes" {print $1}' | \
	xargs -n1 zfs destroy

?



> 
> On 20/04/2015 10:29, Lev Serebryakov wrote:
> > Hello Freebsd-fs,
> > 
> >   I have set of ZFS filesystems, one fielsystem per user like this:
> > 
> > zroot/home/group1/user11
> > zroot/home/group1/user12
> > zroot/home/group1/user13
> > zroot/home/group2/user21
> > zroot/home/group2/user22
> > zroot/home/group3/user31
> > ...
> > 
> >   I want to create complete snapshots of "zroot/home" tree regularly (with
> > zfSnap), but I have one "user" which holds a huge amount of
> > easy-reconstructible data, which I don't wont to store in snapshots.
> > 
> >   Is it possible to exclude one dataset (filesystem) from "zfs snap -r"?
> > 
> >   I don't want to enumerate all but this filesystem in configuration file,
> > as
> > it is error-prone and requires editing configs each time user is created or
> > removed.
> > 
> > P.S. I start to understand how much I love "nodump" flag on UFS and it usage
> > with "dump" command! Absence of such functionality for "zfs send" is really
> > pity.
> > 
> 
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-- 
Sincerely,
D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer:                                 marck at FreeBSD.org ]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
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