Date: Tue, 2 Jul 2013 20:26:59 -0500 From: Adam Vande More <amvandemore@gmail.com> To: Berend de Boer <berend@pobox.com> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: EBS snapshot backups from a FreeBSD zfs file system: zpool freeze? Message-ID: <CA%2BtpaK1jQuKneQsxkVfxJGzXdPdLZfqBM1QWQ0e19nK5t71t1Q@mail.gmail.com> In-Reply-To: <87li5o5tz2.wl%berend@pobox.com> References: <87li5o5tz2.wl%berend@pobox.com>
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On Tue, Jul 2, 2013 at 8:10 PM, Berend de Boer <berend@pobox.com> wrote: > Hi All, > > I'm experimenting with building a FreeBSD NFS server on Amazon AWS > EC2. I've created a zpool with 5 disks in a raidz2 configuration. > > How can I make a consistent backup of this using EBS? > > On Linux' file systems I can freeze a file system, start the backup of > all disks, and unfreeze. This freeze usually only takes 100ms or so. > > ZFS on FreeBSD does not appear to have such an option. I.e. what I'm > looking for is basically a hardware based snapshot. ZFS should simply > be suspended at a recoverable point for a few hundred ms. > > A similar question from 2010 is here: > > http://thr3ads.net/zfs-discuss/2010/11/580781-how-to-quiesce-and-unquiesc-zfs-and-zpool-for-array-hardware-snapshots > > Absent a "zfs freeze" it seems using FreeBSD/zfs on AWS with EBS is > going to be impossible. Unfortunately that means back to Linux sigh. > What is wrong with a simple ZFS snapshot and running the backup against it? I assume that's how most of us are doing it. -- Adam Vande More
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