Date: Wed, 03 Jul 2013 21:07:09 +1200 From: Berend de Boer <berend@pobox.com> To: Kevin Day <toasty@dragondata.com> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: EBS snapshot backups from a FreeBSD zfs file system: zpool freeze? Message-ID: <8738rw57wi.wl%berend@pobox.com> In-Reply-To: <6488DECC-2455-4E92-B432-C39490D18484@dragondata.com> References: <87li5o5tz2.wl%berend@pobox.com> <CA%2BtpaK1jQuKneQsxkVfxJGzXdPdLZfqBM1QWQ0e19nK5t71t1Q@mail.gmail.com> <87ehbg5raq.wl%berend@pobox.com> <20130703055047.GA54853@icarus.home.lan> <6488DECC-2455-4E92-B432-C39490D18484@dragondata.com>
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>>>>> "Kevin" == Kevin Day <toasty@dragondata.com> writes:
Kevin> The other option is to not freeze the filesystem before
Kevin> taking the snapshot, but again you risk leaving things in
Kevin> an inconsistent state, and/or the last few writes you think
Kevin> you made didn't actually get committed to disk yet. For
Kevin> automated systems that create then clone filesystems for
Kevin> new VMs, this can be a big problem. At best, you're going
Kevin> to get a warning that the filesystem wasn't cleanly
Kevin> unmounted.
But I have a couple of disks, and the EBS snapshots are taking
slightly one after another with a few ms between, so I don't think ZFS
will cover from this.
But indeed, you have explained my question very well, thanks!!
--
All the best,
Berend de Boer
------------------------------------------------------
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