[pve-devel] copy_vm: new option -target

Alexandre DERUMIER aderumier at odiso.com
Thu May 2 13:20:27 CEST 2013


I have just done a test, and format is correct after qemu-img convert : V2

test is from a qcow2 to rbd

root at kvmtest1:~/proxmox2/qemu-kvm# qm copy 115 301 --storage rbdtest --full
copy drive virtio0 (local:115/vm-115-disk-1.qcow2)
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# rbd info vm-301-disk-1
rbd image 'vm-301-disk-1':
	size 15360 MB in 3840 objects
	order 22 (4096 KB objects)
	block_name_prefix: rbd_data.3c190a6b8b4567
	format: 2
	features: layering, striping
	stripe unit: 4096 KB
	stripe count: 1



----- Mail original ----- 

De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Jeudi 2 Mai 2013 13:16:08 
Objet: Re: [pve-devel] copy_vm: new option -target 

Am 02.05.2013 13:05, schrieb Alexandre DERUMIER: 
>>> I also read that we'll loose sparseness with qemu-img as it does raw 
> 
>>> export and import. 
> 
> I'm not sure about it, qemu-img code is 
> 
> 
> if (has_zero_init) { 
> /* If the output image is being created as a copy on write image, 
> assume that sectors which are unallocated in the input image 
> are present in both the output's and input's base images (no 
> need to copy them). */ 
> if (out_baseimg) { 
> if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset, 
> n, &n1)) { 
> sector_num += n1; 
> continue; 
> } 
> /* The next 'n1' sectors are allocated in the input image. Copy 
> only those as they may be followed by unallocated sectors. */ 
> n = n1; 
> } 
> } else { 
> n1 = n; 
> } 

Yes but with rbd export everything is allocated to 0. 

Stefan 


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