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

[Berend de Boer]

>>>>> "Markus" == Markus Gebert <markus.gebert at hostpoint.ch> writes:

    Markus> But taking a zfs snapshot is an atomic operation. Why not
    Markus> use that? For example:

    Markus> 1. snapshot the zfs at the same point in time you'd issue
    Markus> that ioctl on Linux 2. take the EBS snapshot at any time
    Markus> 3. clone the EBS snapshot to the new/other VM 4. zfs
    Markus> import the pool there 5. zfs rollback the filesystem to
    Markus> the snapshot taken in step 1 (or clone it and use that)

OK, various tests later: this does not really work. If you create the
snapshot, and make a backup, the snapshot does not show up on the
backup (whatever the reason, perhaps the disks so inconsistent zfs has
to rollback).

But the biggest issue is that if writing is going on and you make the
EBS snapshot, you can't really mount it. Maybe zfs mounts after hours,
but I just gave if it didn't mount it after 1.5 hours.

Another interesting thing I've seen was a completely empty drive after
mount!

So clearly EBS snapshots on a mounted multi-drive pool don't work.

--
All the best,

Berend de Boer


          ------------------------------------------------------
          Awesome Drupal hosting: https://www.xplainhosting.com/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 836 bytes
Desc: OpenPGP Digital Signature
URL: <http://lists.freebsd.org/pipermail/freebsd-fs/attachments/20130708/83a808c4/attachment.sig>