On 13-04-06 01:46 PM, Stephan von Krawczynski wrote:
> On Sat, 06 Apr 2013 10:50:13 -0700
> Geoff Nordli <geo...@gnaa.net> wrote:
>   
>> I would say that the vbox snapshots are not the path you want to take
>> for backups.  VBox snapshots are great when experimenting with software,
>> or creating a library using a base images.  If you do a VBox snapshot
>> online, then you also have a .sav file, and you have to wait for the
>> save/resume to complete before it can come back online.  If you can
>> afford downtime, then I would power off the VM to get a consistent state
>> of your data.
>>
>> Other people may be able to chime in here, but if you looking at using
>> it for backups, then pausing the machine, and using LVM may be something
>> that works, because after you take the backup, you delete the lvm
>> snapshot. You will need to delete the backup though because LVM doesn't
>> scale well for snapshots.  In the past I used LVM and raw disks to do this.
>>
>> Geoff
> Hm, but your script does suspend/resume the vm, too. I cannot see a big
> difference to a vm snapshot ... ?
>
>

The script uses the virsh suspend command which just pauses the VM 
temporarily until it is resumed, which is pretty much instant.

http://www.centos.org/docs/5/html/5.2/Virtualization/chap-Virtualization-Managing_guests_with_virsh.html

Whereas the vbox "savestate" when doing a snapshot takes a lot longer, 
because it writes out the active memory to a saved state file.



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