On Sat, 06 Apr 2013 14:32:34 -0700 Geoff Nordli <geo...@gnaa.net> wrote:
> 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. Well, if you only suspend the guest, then take a backup from the vdi (with whatever method) you will not end up in a consistent backup. Think of a mysql database where you just suspended the guest right in between some write action. your database file has a good chance to be corrupted that way. On the other hand, if you take a snapshot of the guest and backup this chances are better you'll be able to resume the guest later on during restore, not? -- Regards, Stephan ------------------------------------------------------------------------------ Minimize network downtime and maximize team effectiveness. Reduce network management and security costs.Learn how to hire the most talented Cisco Certified professionals. Visit the Employer Resources Portal http://www.cisco.com/web/learning/employer_resources/index.html _______________________________________________ VBox-users-community mailing list VBox-users-community@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/vbox-users-community _______________________________________________ Unsubscribe: mailto:vbox-users-community-requ...@lists.sourceforge.net?subject=unsubscribe
