Re: [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.



--
Ernest Beinrohr, AXON PRO
DevOps, Ing , RHCE 
, RHCVA 
, LPIC 
, VCA , 
+421-2--6241-0360 , +421-903--482-603 

icq:28153343, skype:oernii-work , 
jabber:oer...@jabber.org


“For a successful technology, reality must take precedence over public 
relations, for Nature cannot be fooled.” Richard Feynman
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Re: [Users] How to backup thin provisioned qcow2 disks?

[Allon Mureinik]

- Original Message -

> From: "Ernest Beinrohr" 
> To: "users" 
> Sent: Monday, November 25, 2013 12:20:08 PM
> Subject: [Users] How to backup thin provisioned qcow2 disks?

> 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? 

> 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? 

> 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. 

> - is it possible to convert thin to preallocated and
> discard the snapshots
Unfortunately, not while the VM is still running. If you shut it down, you can 
merge the snapshot back. 
Go to VMs -> Snapshots -> select the snapshot you want to remove, and click 
delete. 

> thanks

> --
> Ernest Beinrohr, AXON PRO
> DevOps, Ing , RHCE , RHCVA , LPIC , VCA , +421-2--6241-0360 ,
> +421-903--482-603
> icq:28153343, skype:oernii-work , jabber:oer...@jabber.org

> “For a successful technology, reality must take precedence over public
> relations, for Nature cannot be fooled.” Richard Feynman

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> Users mailing list
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[Users] How to backup thin provisioned qcow2 disks?

[Ernest Beinrohr]

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). Also they
are combined MUCH bigger than the preallocated:
8GB raw vs thin: 31 GB - 1 snapshot.

So I have two questions:
- how would you backup these thin disks?
- is it possible to convert thin to preallocated and
   discard the snapshots


thanks

--
Ernest Beinrohr, AXON PRO
DevOps, Ing , RHCE 
, RHCVA 
, LPIC 
, VCA , 
+421-2--6241-0360 , +421-903--482-603 

icq:28153343, skype:oernii-work , 
jabber:oer...@jabber.org


“For a successful technology, reality must take precedence over public 
relations, for Nature cannot be fooled.” Richard Feynman
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