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Date:      Thu, 25 Feb 2016 15:58:10 -0500
From:      Zaphod Beeblebrox <zbeeble@gmail.com>
To:        FreeBSD Hackers <freebsd-hackers@freebsd.org>, freebsd-fs <freebsd-fs@freebsd.org>
Subject:   ZFS full system backup hoses the backup host.
Message-ID:  <CACpH0Me58jK%2BOz3PCqH93NEn=5V1SKwPGdku62sAVLVh%2BWxEeA@mail.gmail.com>

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This violated POLA for me.  I backed up a host using:

time zfs send -vRI @backup-1-e zroot@backup-1-f | ssh backuphost "zfs
receive -vFud zroot/backup/host"


Only to find that the backup host (a week later) failed to reboot?  The
problem?  Well... -u on receive marks the filesystem as unmounted only
"right now" not "next reboot" and -R on send implies -p (send dataset
attributes) and...

... zroot/ROOT/default mountpoint=/ (among others).

The only hackish way to fix this I see is to have a list of mountpoints to
correct --- which is partially what I'm trying to avoid by using -R --- I
just want the whole thing backed up.

What have other people done to get around this and/or can we either put in
an "ignore properties" on receive flag or a -R on send that doesn't send
them?



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