[Users] How to backup thin provisioned qcow2 disks?

[Ernest Beinrohr]

Dňa 04.12.2013 15:57, Allon Mureinik wrote / napísal(a):
>
>     Hi, I'm currently looking for ways to backup my disks.
>     Live storage migration converted my disks from
>     preallocated to thin provisioning. Preallocated disk
>     backups are working from a simple dd from a snapshot,
>     but the thin qcow2 disks are a problem. I seems it uses
>     multiple logical volumes (3 in my case).
>
> For one snapshot? Are you sure?
Not anymore, i've deleted the host and its disks :(
>
>     Also they
>     are combined MUCH bigger than the preallocated:
>     8GB raw vs thin: 31 GB - 1 snapshot.
>
> What version are you using?
> And on what storage?
3.3 on iscsi. And I am talking about the LVM lv sizes. No idea how much 
of that space the qcow actually occupies.
>
>
>
>     So I have two questions:
>     - how would you backup these thin disks?
>
> You could just copy all three of your volumes.
> A more robust way, though, would probably be to export the disk to an 
> export domain.
The problem was, that i didn't know WHICH volumes to copy, but that was 
probably due a wrong sql query.


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Ernest Beinrohr, AXON PRO
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