EBS snapshot backups from a FreeBSD zfs file system: zpool freeze?

[Berend de Boer]

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.

--
All the best,

Berend de Boer


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