[pve-devel] savevm tests

Alexandre DERUMIER aderumier at odiso.com
Thu Aug 30 17:18:40 CEST 2012


>>Yes, but finally we want do a "blockdev_snapshot_sync" 
so , no vmstate ? (because vmstate is only through savevm)

and blockdev-snapshot-sync works only for qcow2, and external snapshot(for the moment)

>>- how does that call methods inside our library? 
>>Or how do you plan to create a snapshot of all device including VM state? 

here how I see things:


for nexenta: 
     no vmstate(no possible)
     ----------
   - send freeze-fs via qemu-ga if available
   - use nexenta api to snapshot all disks
   - unfreeze freeze-fs via qemu-ga if available

for rbd:
    no vmstate (not available)
    ----------   
   - send freeze-fs via qemu-ga if available
   - savevm.  (or rbd command, it's works too)
   - unfreeze freeze-fs via qemu-ga if available

for sheepdog:
    vmstate
    -------
    savevm

    novmstate
    ---------
   - send freeze-fs via qemu-ga if available and if we don't don't
   - savevm.  (or rbd command, it's works too)
   - unfreeze freeze-fs via qemu-ga if available


for qcow2:
    vmstate
    -------
    savevm

    novmstate
    ---------
   - send freeze-fs via qemu-ga if available and if we don't don't
   - savevm.  (or rbd command, it's works too)
   - unfreeze freeze-fs via qemu-ga if available



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

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Jeudi 30 Août 2012 16:37:26 
Objet: RE: [pve-devel] savevm tests 

> >>And you want to implement that API twice? Not really an option for me. 
> I don't understand what you want to say. I just want to add a snapshot sub in 
> the nexenta storage plugin something like this sub nexenta_snapshot_zvol { 
> 
> my $json = '{"method": "snapshot","object" : "zvol","params": 
> ["pool/image at snap1"]}'; 
> nexenta_request($json); 
> 
> } 

Yes, but finally we want do a "blockdev_snapshot_sync" - how does that call methods inside our library? 
Or how do you plan to create a snapshot of all device including VM state? 



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