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

[Lev Serebryakov]

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.

-- 
Best regards,
 Lev                          mailto:lev at FreeBSD.org
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